Choosing the right structural steel shouldn’t feel like cracking a secret code. Yet, terms like IS 2062, E250BR or E350BO, combined with sometimes confusing technical data, can leave even experienced engineers and buyers scratching their heads. Getting the right IS 2062 material is crucial for your project’s safety, longevity and success. You’ve come to the right place. This guide is designed to be your clear, comprehensive resource for everything IS 2062. We’ll break down the official standard, explore the different grades, dive into chemical makeup and mechanical strength, see where it’s used and offer practical tips—all to help you select the perfect IS 2062 steel with confidence.

What is IS 2062 and Why It’s Important in Structural Steel?

Think of IS 2062 as the official Indian standard, published by the Bureau of Indian Standards (BIS), that defines the requirements for hot-rolled structural steel. This standard covers steel delivered as:

• Plates
• Sections (like beams, angles, channels)
• Flats (flat bars)
• Bars (round, square, etc.)

Its core purpose is simple: to ensure that the structural steel used across India for building and engineering provides consistent strength, reliable weldability and long-lasting durability. It sets a predictable quality benchmark.

Why IS 2062 is Foundational for Indian Infrastructure?

The IS 2062 standard isn’t just paperwork; it’s a critical element underpinning countless infrastructure projects you see every day – from towering bridges and bustling airports to essential power plants and refineries. Here’s why it’s so vital:

• Safety Assurance: Guarantees minimum strength and toughness levels, crucial for structural integrity.
• Project Compliance: Provides a clear specification for tendering, design and construction ensuring everyone is on the same page.
• Lifecycle Durability: Standardized quality contributes to long-term performance and lifespan of structures.
• Reliable Framework: Engineers and builders can trust that steel marked IS 2062 material meets specific, verifiable criteria.

Key Reasons IS 2062 Steel is the Go-To Choice

Its widespread use comes down to its dependable properties and versatility:

• Major Infrastructure: The backbone of bridges, airports, metro rail projects, stadiums and large commercial buildings.
• Energy & Process Industries: It is essential for pipeline supports, oil & gas structures, refinery equipment and power plant frameworks.
• Pressure Equipment: Specific grades are chosen for constructing reliable low-to-medium pressure vessels and boiler components.

Adhering to IS 2062 specifications directly translates to safer structures, enhanced project quality and dependable long-term performance.

Understanding The Different Material Grades In IS 2062

IS 2062 offers a family of steel grades, primarily distinguished by their strength levels and sometimes impact toughness:

• Basic Grades (Older Naming Still Encountered):
• Grade A: A mild steel, generally used for less critical, lighter structural elements.
• Grade B: Medium strength, a common choice for general construction and fabrication.
• Yield Strength Based Grades (IS 2062:2011 onwards):
• E250: The popular workhorse grade with a minimum yield strength of 250 MPa. Ideal for many standard structural uses.
• E350: Offers significantly higher strength (350 MPa min. yield) for applications demanding greater load capacity or allowing for lighter designs.
• E410 / E450: High-strength grades (410/450 MPa min. yield) reserved for heavy-duty structures and specialized engineering applications.

What Do E250BR, E250BO, E350BR Mean?

Those letters tacked onto the grade aren’t random; they tell you crucial information about impact testing which measures the steel’s resistance to brittle fracture, especially in colder conditions:
 

• B: Indicates the steel must be impact tested. (Grades without ‘B’ like ‘A’ usually aren’t).
• R: Impact tested at Room Temperature (typically 27°C). Suitable for general applications where severe cold isn’t expected.
• O: Impact tested at 0°C (Zero Degrees Celsius). This signifies enhanced toughness, making it essential for structures exposed to colder climates or applications requiring higher safety margins against fracture.
• (C): Sometimes seen, indicates testing at -20°C, for even greater low-temperature toughness.

Quick Grade Comparison: Strength & Toughness

Detailed Indian Standard (IS) 2062 Chemical Composition

The chemical composition of IS 2062 steel is carefully controlled by BIS to achieve the desired balance of strength, weldability, formability and toughness. Here are the typical maximum limits for the key players:

Note: These are general guidelines. Specific maximums (especially for Carbon and CE) vary slightly between grades (A, B, E250, E350 etc.). Always refer to the specific grade requirements in the latest IS 2062 standard or the supplier’s MTC for exact figures.

Chemistry Differences Between Grades

While limits for S, P and Si are often similar, Carbon content is a key differentiator. Generally, higher strength grades (like E350, E410) have stricter controls on maximum Carbon and Carbon Equivalent (CE) to maintain good weldability despite their increased strength (achieved through Manganese or other elements). This careful chemical control is essential for ensuring the steel behaves predictably during fabrication and in service.

Understanding IS 2062 Mechanical Properties

These properties tell you how the steel performs under load:

How BR and BO Grades Differ in Practice?

It boils down to temperature toughness:

• BR (Room Temp Tested): Perfectly adequate for most structures in moderate climates where temperatures don’t frequently drop near freezing.
• BO (0°C Tested): The safer choice for structures in regions experiencing colder winters or for critical applications where low-temperature fracture resistance is paramount. It provides documented assurance of toughness at freezing point.

Key Updates in the IS 2062:2011 Edition

The 2011 revision brought important clarifications:

• Clearer Strength Grades: Introduced the “E” followed by yield strength (E250, E350, etc.), making selection more intuitive based on design needs.
• Mandatory Impact Testing: Formalized the BR/BO/C classifications, linking impact toughness requirements directly to the grade designation.
• Stricter Controls: Reinforced the need for manufacturers to meet specific chemical and mechanical property ranges consistently.

These changes enhanced the standard’s usability and alignment with international practices.

IS 2062 Material Equivalent Standards Globally

When projects involve international specifications, knowing approximate equivalents is helpful (but always verify!):

IS 2062 vs. ASTM A36: While E250 and A36 are close cousins in strength and chemistry, IS 2062 material (especially BR/BO) is often specified with mandatory impact testing relevant to varied Indian climate conditions which isn’t standard for basic A36. Direct substitution requires careful review of project specs.

Typical Applications of IS 2062 Steel in Various Industries

You’ll find IS 2062 steel hard at work in:

• Construction: Structural frames for buildings, bridges, flyovers, stadiums, industrial sheds.
• Oil & Gas: Offshore platforms, pipeline supports, storage tank walls and roofs.
• Shipbuilding: Ship hulls, decks, internal structures.
• Automotive: Heavy truck chassis, trailer frames, vehicle components.
• Machinery & Equipment: Crane structures, heavy industrial machine bases, earthmoving equipment components, lifting gear.

Selecting the correct IS 2062 grade ensures the structure or equipment has the optimal strength, toughness and durability for its intended job.

How to Select the Right IS 2062 Grade: A Practical Checklist

Make an informed decision by considering:

• Strength Needed: Does your design require E250’s standard strength or the higher capacity of E350 or E410? Match the grade’s Yield Strength to calculations.
• Weldability: Will there be extensive or complex welding? While all grades are weldable, lower carbon/CE variants (often found in higher grades) can sometimes simplify procedures for very thick sections.
• Operating Temperature: Will the structure face freezing temperatures? If yes, BO grade is strongly recommended for enhanced safety against brittle fracture. BR is suitable for moderate climates.
• Impact Requirements: Does the design specification explicitly call for certain impact energy values? Ensure the chosen grade (BR/BO/C) meets these.

Common Mistakes to Avoid During Selection

• Ignoring Temperature: Choosing BR for a cold environment application is a significant risk.
• Skipping Certification: Accepting material without a valid, traceable Material Test Certificate (MTC) from the manufacturer. This compromises quality assurance (Trustworthiness signal).
• Assuming Equivalence: Treating international grades as identical without verifying detailed specs.

Finding Trustworthy Suppliers: The Importance of Certified IS 2062 Material & MTCs

For structural applications where safety and reliability are paramount, always source IS 2062 steel from reputable suppliers who provide BIS-certified material accompanied by a valid Material Test Certificate (MTC).

An MTC is your proof of quality, confirming:

• Compliance with the specific IS 2062 grade (e.g., IS 2062 E350BO).
• Actual chemical analysis results (heat-specific).
• Verified mechanical test results (Yield, Tensile, Elongation, Impact values).
• Traceability to the specific batch/heat of steel.

Suppliers demonstrating this commitment to certification, like Kalpataru Piping Solutions, provide assurance of quality, compliance and traceability.

Resources for Deeper Dives (Official Documentation)

For the most detailed and up-to-date information:

• Purchase the official IS 2062:2011 standard directly from the Bureau of Indian Standards (BIS) website.
• Request detailed datasheets for specific grades from your chosen supplier.
• Familiarize yourself with the format and content of a proper Material Test Certificate (MTC).

(Note: Official standards are typically copyrighted and require purchase.)

Conclusion: Making Smart & Confident IS 2062 Steel Choices

IS 2062 structural steel offers a versatile range of options tailored for diverse engineering needs. By understanding the grades, the meaning behind BR/BO, the key chemical and mechanical properties and how they relate to your application (especially temperature!), you can move beyond confusion and select the most suitable and safest material. Always prioritize certified steel backed by comprehensive MTCs.

Frequently Asked Questions About IS 2062

Ever felt like you need a secret decoder ring to understand steel types? If you’re trying to figure out mild steel, maybe ask “Which grade do I actually need?” or worrying “Is this stuff strong enough?” you’re definitely not sailing that boat alone. And sorting out how it’s different from other steels? Yeah, that can be a head-scratcher too.Forget the dense manuals. Let’s talk about mild steel like normal people. We’ll cover the basics: what it is, what’s mild steel composition, what it can handle, its good and bad points and where you literally bump into it every single day. This is for anyone who designs with it, builds with it, buys it or is just curious about this massively important metal. It’s no exaggeration – mild steel is kind of the unsung hero holding up large parts of our world. Think buildings scratching the sky, the cars we drive, the bridges connecting places, even the humble pipes hidden in walls. So, what makes it the go-to choice so often?

1. It’s Easy to Work With: This is probably its superpower. You can cut mild steel, bend it into shape, drill holes in it and crucially, weld it together without jumping through hoops. Ask any fabricator – they appreciate how cooperative it is. It lets you build complex things relatively easily.
2. It’s Kind to the Budget: Let’s be honest, cost matters. Compared to stainless steel or aluminum, mild steel gives you a solid amount of performance without requiring you to empty your wallet. This makes big projects actually affordable.
3. It’s Predictably Strong: Okay, it’s not the superman of steels, but it has reliable, well-understood strength. Engineers know how it behaves and can design structures and parts confidently, knowing it will handle the expected loads.

Getting your head around mild steel isn’t just trivia. It means you can make better calls on materials, potentially design things that last longer (or are easier to make) and keep costs in check. It’s practical stuff.

What is Mild Steel?

The secret ingredient? Or rather, the lack of one specific ingredient in high amounts? It all comes down to carbon. Mild steel gets its name because it has a low amount of carbon, usually kicking around between 0.05% and 0.25% of its total weight. That might sound tiny, but in the steel world, carbon dramatically changes the game.

Keeping the carbon low does a few really important things:

• Makes it Bend, Not Break (Ductility): Lower carbon means the steel is more ductile. Think of it like being less brittle. You can bend it, stretch it and form it more easily without it just cracking. Super important for making things like car panels or curved supports.
• Makes Welding a Breeze (Weldability): This is a huge plus. Less carbon means the area around a weld doesn’t get super hard and brittle when it cools down. This dramatically reduces the risk of cracks and makes it much easier to get strong, reliable welded joints – critical for safety in structures.
• Goes Easy on the Tools (Machinability): Because it’s softer than high-carbon steels, cutting tools, drill bits and milling machines have an easier time working with mild steel. Things get done faster and tools last longer.

So, mild steel basically trades some maximum potential hardness and strength for being way more versatile and user-friendly in the workshop.

Want to know how much your mild steel weighs? Use our handy MS Round Bar Weight Calculator to get quick and accurate outcomes for your next project.

Mild Steel vs. Stainless Steel

Sometimes seeing how things compare makes it click. Here’s a simplified look:

Mild Steel Composition: Chemical Elements and Their Percentages

It’s not just pure iron. Like a good recipe, those small additions matter. Here’s the mild steel composition for better understanding:

• Iron (Fe): The main ingredient, making up almost everything (98-99%+).
• Carbon (C): The key player, kept low at 0.05% to 0.25%. This range dictates its “mildness.”
• Manganese (Mn): Usually 0.25% to 0.60% (can be higher). Think of it as a helper – adds a bit of strength and toughness and helps during the steelmaking process itself.
• Sulphur (S) & Phosphorus (P): Unwanted guests! Mills work hard to keep these below 0.050% (S) and 0.040% (P). Too much sulphur can cause problems when the steel is hot; too much phosphorus can make it brittle when cold. Low levels = better quality.
• Silicon (Si): Often present in small amounts (maybe up to 0.40%). Helps clean up the steel during production and adds a touch of strength.

Mechanical and Physical Mild Steel Properties

• Yield Strength (250-400 MPa range): Think of this as the “don’t permanently bend” point. It’s how much load the steel can take before it stays bent. Mild steel’s composition provides it a yield strength that is solid enough for tons of structural work – beams, columns, frames.
• Tensile Strength (370-550 MPa range): This is more about the absolute maximum pull it can handle before it starts to fail. Gives you an idea of its ultimate breaking point.
• Elongation (~20-25%): How much can it stretch before it snaps? Mild steel stretches quite a bit! This “ductility” is great because it means the material often shows signs of stress (bending, stretching) before a catastrophic break, giving a warning. Brittle materials just snap!
• Hardness (~120-180 HB): How resistant is it to scratches and dents? Mild steel is relatively soft. Good news for machining, bad news if you need something super wear-resistant (like a bulldozer blade edge – that needs tougher steel!).
• Weldability: We keep mentioning it because it’s SO important. Mild steel just joins together really well with common welding methods, making building things much easier and often cheaper.

Common Mild Steel Grades

When you order mild steel, you don’t just say “mild steel,” you usually ask for a specific grade based on a standard. These standards are like guarantees from the manufacturer about the steel’s minimum properties. Here are some you’ll hear a lot:

• IS 2062 (Common in India): Mild Steel Grades like E250 are everywhere in construction. Sometimes people still use older terms like Grade A or B which are roughly similar in strength. E250 means it has a guaranteed minimum yield strength of 250 Megapascals (MPa).
• ASTM A36 (Big in the USA): If you’re in North America, you’ll hear A36 constantly. It’s used for I-beams, channels, plates – all sorts of structural stuff. Its minimum yield strength (36 ksi) is almost identical to E250 (around 250 MPa).
• EN 10025 (Europe’s Standard): Covers many grades. S235JR and S275JR are very common. The number roughly indicates the minimum yield strength (in MPa), so S275JR is very similar to A36 and E250. The ‘JR’ part tells you about basic impact testing done at room temp.
• JIS G3101 (Japan): SS400 is a popular grade, where the 400 refers to its minimum tensile strength (not yield strength) in MPa.

Applications of Mild Steel

• Building Skeletons: Those huge steel frames for office buildings or warehouses? Prime mild steel territory. Also, the reinforcing bars (rebar) are hidden inside concrete foundations and columns.
• Your Car: While cars use lots of materials now, mild steel still makes up many body panels, chassis parts and internal brackets because it’s formable and relatively cheap (but needs good paint!).
• Ships and Boats: The plates welded together to make the hull? Often mild steel (special marine grades, heavily protected from corrosion, of course).
• Factory Workhorses: The frames holding heavy machinery, conveyor belt systems, support structures – mild steel provides the needed rigidity without excessive cost.
• Pipes and Tubes Galore: From water pipes (often galvanized zinc-coated) and electrical conduit running through walls, to handrails, fence posts and even bicycle frames.
• Furniture Basics: Metal desk legs, the frames of sturdy chairs or shelves – often simple, cost-effective mild steel.
• Bits and Bobs: Countless brackets, housings, simple tools, nuts, bolts, washers… mild steel is perfect for these everyday hardware items.

Advantages of Mild Steel

• It’s Cheap: Compared to most other metals offering similar structural ability, mild steel is usually the most cost-effective option. Big projects depend on this.
• It Joins Easily (Weldability): Saves time and money during fabrication. Getting strong welds isn’t overly complicated.
• It’s Flexible (Ductility/Malleability): You can bend it, press it, roll it into curves without it complaining (cracking) too much.
• It Cuts Nicely (Machinability): Easier on your tools and your time compared to harder metals.
• It’s Strong Enough: Don’t underestimate it! For the vast majority of structural and general uses, its strength is perfectly fine.
• It Can Be Reborn (Recyclability): Steel is heavily recycled which is fantastic for sustainability. Old mild steel can become new steel.

What You Need to Watch Out For (Limitations):

• RUST! (Poor Corrosion Resistance): This is the big one, the elephant in the room. Mild steel + Oxygen + Water = Rust. It’s inevitable if left unprotected. You must plan to protect it if it will be exposed to moisture or humidity. Paint, galvanizing, powder coating, even just oil for tools – some kind of barrier is usually essential for long life.
• It’s Not Invincible (Lower Strength/Hardness): Need something to resist constant grinding or abrasion? Need something incredibly hard for a cutting edge? Need the absolute lightest possible structure for a given strength? Mild steel might not be your guy. That’s where higher carbon steels, alloy steels or other materials come in. Also, keep it away from high heat, as it loses strength significantly faster than some other steels.

Reliable Suppliers of Mild Steel in India

So, you need some mild steel. Great! But how do you know you’re getting what you pay for, especially if it’s for something important like a building support or a machine frame?

This is where reliable suppliers and those official-looking papers called Material Test Certificates (MTCs) are your best friends.

• Specify the Standard: Asking for steel that meets a known standard (like IS 2062 E250 or ASTM A36) sets a clear quality baseline.
• Demand the MTC: This certificate is proof. It comes from the mill (or a certified distributor) and shows the actual chemical test results and mechanical test results (like yield strength) for the exact batch of steel you’re buying. It confirms it meets the standard you asked for. Don’t accept steel for critical jobs without it!

Mild steel totally deserves its spot as a fundamental building block of our world. It’s affordable, dependable and incredibly versatile if you understand its personality. Embrace its fantastic workability, use its reliable strength appropriately, but always, always remember its tendency to rust. Protect it properly, choose the right grade, get it from a good source and mild steel will likely be a smart, effective solution for your needs.

Frequently Asked Questions About Mild Steel

A special type of stainless steel called duplex is distinguished by its balanced microstructure, which consists of roughly equal amounts of ferrite and austenite. Its dual-phase structure improves its corrosion resistance and mechanical qualities, making it a popular option across a number of industries. Duplex stainless steel normally comprises at least 30% of the lesser phase by volume, though this is not strictly specified.

Overview of Duplex Stainless Steel Grades

Due to its exceptional strength and resistance against corrosion, duplex stainless steel is used widely. The most commonly recognized ASTM grades of duplex steel products that Kalpataru Piping Solutions offers are ASTM A182 F51, ASTM A182 F53, ASTM A182 F55, and ASTM A182 F61; these grades all fall within the ASTM A182 specification. Due to their exceptional resilience to hostile environments, these grades are widely used in industries like desalination, chemical processing, oil and gas, and ships.

Types of Duplex Stainless Steel ASTM Grades

• ASTM A182 F51 (UNS S31803 / S32205)
  The original 22% Cr duplex stainless steel, UNS S31803, is equivalent to ASTM A182 F51. UNS S32205 (F60) is the result of producers gradually optimizing its composition to increase pitting corrosion resistance. It is possible to dual-certify this upgraded grade as S31803, but not the other way around. Due to its exceptional strength and resistance to corrosion, F51/F60 makes up almost 80% of the production of duplex stainless steel.

• ASTM A182 F53 (UNS S32750)
  UNS S32750, a 25% Cr super duplex stainless steel with better pitting resistance and a greater yield strength than ASTM A182 F51, is comparable to ASTM A182 F53. Often referred to as SAF 2507, this grade is ideal for applications requiring high resistance to corrosion and strong mechanical strength in harsh environments.

• ASTM A182 F55 (UNS S32760)
  Another 25% Cr super duplex stainless steel with tungsten added to enhance strength and corrosion resistance is ASTM A182 F55, also referred to as UNS S32760. It was first created as Zeron 100 and is now widely utilized in the chemical, offshore, and shipping sectors where exceptional durability and resilience to adverse environments are essential.

• ASTM A182 F61 (UNS S32550)
  UNS S32550, a super duplex stainless steel that was first introduced as Ferralium 255, is equivalent to ASTM A182 F61. In comparison to F53 and F55, it has a higher strength (minimum yield strength of 85 ksi) and contains up to 2.0% copper, which further enhances resistance to pitting corrosion. Applications including chemical processing and highly corrosive conditions, such as saltwater, frequently use this grade.

Contact Us for Duplex Stainless Steel ASTM Grades

Looking for premium ASTM Grades of Duplex Stainless Steel? ASTM A182 F51, F53, F55, and F61 are among the many duplex stainless steel products that Kalpataru Piping Solutions offers. Our materials provide exceptional strength, durability, and corrosion resistance, making them ideal for applications in the oil and gas, aquatic, chemical processing, and desalination industries. Get premium duplex stainless steel items from a reliable manufacturer by raising inquiries regarding the product right away.

FAQs

Overview of Duplex 2205

The nitrogen enhanced duplex steel Duplex 2205 (UNS S32205) is known for its exceptional strength and resistance against corrosion. With a balanced microstructure that contains between 40 and 50 percent magnetite when heated, it offers tremendous resistance to stress corrosion cracking while maintaining good durability and weldability.

2205 Duplex Stainless Steel Supplier

One of the top suppliers of duplex stainless steel is Kalpataru Piping Solutions, which provides premium materials with exceptional strength and resistance against corrosion. Our Duplex 2205 material provides high mechanical qualities and durability in challenging environments by effectively balancing iron based and austenitic microstructures.

We provide an extensive range of 2205 duplex stainless steel goods, including as pipes, tubes, fittings, flanges, and sheets, to a number of industries, including pulp and paper, chemical processing, oil and gas, maritime, and desalination plants.

• Duplex 2205 Pipes & Tubes

• Duplex 2205 Plates & Sheets

• Duplex 2205 Fasteners

• Duplex 2205 Buttweld Fittings

• Duplex 2205 Filler Wire

• Duplex 2205 Flanges

• Duplex 2205 Round Bars

Key Properties of Duplex UNS S32205

• Corrosion Resistance :
  Compared to stainless steels from the 300 series, Duplex 2205 stainless steel has higher resistance to corrosion, particularly against chloride stress corrosion cracking. High resistance to pitting and crevice corrosion is offered by its high chromium, molybdenum, and nitrogen levels, which makes it ideal for saltwater marine applications, chemical manufacturing, and the food industry.
• Strength & Weldability :
  Duplex 2205 offers more strength over standard austenitic grades due to its balanced ferritic-austenitic structure, which ensures high fatigue resistance. While it is strong, it still melts well, allowing fabrication easy without compromising durability.
• Heat Treatment & Machining :
  Its mechanical qualities are restored by heating it between 1020 and 1100°C and then quickly cooling it down. Duplex 2205 cannot be hardened by heat treatment, although work hardening is a possibility. Due to its extreme strength, it can be challenging to machine and needs lower rates of cutting than the stainless steel 304.

FAQs

High-performance stainless steel alloy Super Duplex 2507 (UNS S32750) has exceptional strength and resistance to corrosion. It is mostly used in elevated temperatures and extreme environments, such as those found in oil and gas exploration, chemical processing, and marine industries.

In this guide, we will explore the benefits of Duplex 2507 in industrial settings, as well as its chemical makeup, salient characteristics, and applications.

Super Duplex 2507 Overview

Super Duplex 2507, also known as Duplex 2507 or UNS S32750, is a high-strength duplex stainless steel 2507 alloy designed for harsh environments. With a composition of 25% chromium, 4% molybdenum, and 7% nickel, it provides exceptional resistance to stress corrosion cracking, crevice corrosion, and chloride pitting.

With a balanced austenite-ferrite microstructure (50/50), super duplex UNS S32750 offers exceptional mechanical strength and endurance due to its balanced austenite-ferrite microstructure (50/50). Because of its great strength, thinner materials may be used, which lowers weight and fabrication costs without compromising structural integrity.

Super Duplex 2507 Forms

Kalapataru Piping Solutions is a Leading manufacturer, supplier, and exporter of premium Super Duplex 2507 (UNS S32750) products. It is renowned for its exceptional strength, corrosion resistance, and resilience in harsh conditions.

Our Super Duplex S32750 Products

• Super Duplex Steel UNS S32750 Fasteners
• Super Duplex Steel UNS S32750 Seamless Pipes & Tubes
• Super Duplex Steel UNS S32750 Wire Mesh
• Super Duplex Steel UNS S32750 Plates & Sheets
• Super Duplex Steel UNS S32750 Filler Wire
• Super Duplex Steel UNS S32750 Buttweld Pipe Fittings
• Super Duplex Steel UNS S32750 Round Bars
  

Features of Super Duplex 2507 (UNS S32750)

2507 Chemical Composition

The chemical composition of Super Duplex 2507 is designed to provide exceptional corrosion resistance and high strength. About 25% of it is chromium, 4% is molybdenum, and 7% is nickel. Compared to common stainless steels like 304 or 316L, S32750 has a much higher resistance to localized corrosion due to its composition, which results in an outstanding pitting resistance equivalent number (PREN) of 42–45.

Mechanical Properties of Duplex 2507

Standard austenitic stainless steels have a yield strength of about 250 MPa, but S32750 typically has a yield strength of about 550 MPa. Because of its increased strength, thinner sections can be used without compromising structural integrity, which lowers equipment weight and overall material costs. Furthermore, even in high-stress situations, Duplex 2507 retains its mechanical qualities and exhibits exceptional wear resistance.

Corrosion Resistance of UNS S32750

UNS S32750 exhibits remarkable corrosion resistance, especially in harsh conditions with seawater, acids, and chlorides. It is perfect for the chemical processing, offshore, and maritime industries because of its high chromium, molybdenum, and nitrogen content, which improves its resistance to pitting and corrosion. Compared to austenitic stainless steels like 316L, which normally have a critical pitting temperature (CPT) below 30°C, Super Duplex 2507 has a CPT above 50°C.

Welding Considerations for Duplex 2507

Strict temperature control and the use of suitable filler materials are necessary while welding Super Duplex 2507 in order to preserve its dual-phase microstructure. Common methods for guaranteeing excellent welds include gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), and shielded metal arc welding (SMAW). To avoid the production of unwanted intermetallic phases that can lower toughness and corrosion resistance, the interpass temperature must be carefully regulated to not exceed 150°C (300°F). Weld integrity and lifespan are guaranteed by appropriate post-weld inspection techniques like dye penetrant and ultrasonic testing.

Applications of Super Duplex 2507

Super Duplex 2507 stainless steel is perfect for industries that need to be strong and resistant to corrosion. Because of its resilience in challenging conditions, it finds extensive application in chemical processing, offshore oil and gas, and desalination facilities. The steel is necessary for PVC processing, industrial reactors, bleaching apparatus, and maritime applications such as ship shafts and propellers. Additionally, it is essential to fluid handling pipelines, exhaust scrubbers, and flue gas desulfurization (FGD) systems, guaranteeing sustained performance under demanding circumstances.

FAQs

Stainless steel plays a crucial role in various industries applications, offering exceptional strength, durability, and corrosion resistance. With availability of various grades, UNS S31803 Duplex Stainless Steel is known for its superior performance in demanding applications.

Here, in this blog we will discuss UNS S31803 material, highlighting its key properties, applications.

Understanding UNS S31803 Material

UNS S31803 Duplex Stainless Steel also known as Duplex 2205, is a high-performance alloy widely used across industries for its exceptional strength, durability, and corrosion resistance. With a balanced microstructure of austenite and ferrite, it provides superior mechanical properties, making it a preferred choice for chemicals, seawater, and extreme temperatures applications.

UNS S31803 Duplex Steel Supplier – Kalpataru Piping Solutions

Kalpataru Piping Solutions is a trusted supplier of UNS S31803 Duplex Steel, a chromium-nickel-molybdenum austenitic-ferritic grade known for its high strength, corrosion resistance, and durability. This type of duplex stainless steel offers superior resistance to stress corrosion cracking, pitting, and crevice corrosion.

Our Duplex UNS S31803 Products

We offer a wide range of UNS S31803 products to meet industrial requirements:

• Duplex Steel UNS S31803 Pipes & Tubes
• Duplex Steel UNS S31803 Plates & Sheets
• Duplex Steel UNS S31803 Flanges
• Duplex Steel UNS S31803 Fasteners
• Duplex Steel UNS S31803 Round Bars & Wires
• Duplex Steel UNS S31803 Wire Mesh
• Duplex Steel UNS S31803 Buttweld Fittings
• Duplex Steel UNS S31803 Filler Wire

Key Features of UNS S31803

Corrosion Resistance of Duplex UNS S31803

Duplex stainless steel UNS S31803 offers excellent corrosion resistance, compared with austenitic stainless steel grades like 316. The duplex S31803 material resists intergranular corrosion, stress corrosion cracking, and pitting corrosion better than 304 and 316 stainless steels. Its superior corrosion resistance makes duplex steel UNS S31803 ideal for marine, chemical, and oil & gas applications.

Welding of Duplex S31803 Material

Duplex UNS S31803 material has good weldability. The low thermal expansion reduces residual stresses after welding. Using duplex welding electrodes that match the duplex SS UNS S31803 base metal ensures strong and durable welds. Electric arc welding methods are recommended, but oxyacetylene welding should be avoided to prevent carbon contamination. While post-weld annealing is not always necessary, it enhances the corrosion resistance of duplex stainless steel S31803 in extreme conditions.

Heat Treatment of Duplex Stainless Steel UNS S31803

Duplex UNS S31803/F51 undergoes solution annealing to enhance corrosion resistance and mechanical properties. The typical annealing temperature for duplex stainless steel UNS S31803 is between 1025°C and 1125°C, followed by rapid cooling. The temperature ranges from 150°C to 300°C, with a holding time of 30 minutes to 1 hour. Proper heat treatment ensures that duplex steel UNS S31803 retains its strength and durability in demanding applications.

Composition of Duplex Steel UNS S31803

The duplex S31803 material consists of 22% chromium, 5% nickel, 3% molybdenum, and 0.15% nitrogen. This unique composition enhances pitting and crevice corrosion resistance, making duplex SS UNS S31803 an excellent choice for offshore and aggressive environments.

Mechanical Properties of Duplex Stainless Steel S31803

The duplex UNS S31803 material has exceptional mechanical properties, with a yield strength of 450 MPa and a tensile strength of 620 MPa. The high strength-to-weight ratio makes duplex UNS S31803 a preferred choice for structural applications. While the elongation and formability of duplex stainless steel UNS S31803 are lower than austenitic grades, its high durability and corrosion resistance make it ideal for demanding industrial uses.

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