by kalpataru | Dec 9, 2022 | Blog
What Is Passivation?
On metal surfaces, corrosion prevention methods like passivation are widely used. Using citric or nitric acid, free iron from the metal surface is eliminated during the passivation process for stainless steel.
A thick layer of protective oxide is produced by the chemical treatment, shielding the product from chemical reactions with the air that would otherwise erode the stainless steel. After passivation, the chemical being treated frequently looks just like it did before.
3 Benefits of Passivation
Reduced Maintenance
The tiny components of your stainless steel applications are safeguarded by the corrosion resistance that passivation provides. It follows that you won’t need to perform any additional maintenance to stop rust from weakening the bolts and other tiny parts of your product, which could cause your application to break down or stop working altogether.
Removes Contamination
The passivation process gives stainless steel a uniform, smooth appearance and finishes by thoroughly cleaning off all grease, oils, and grime from its surface. You can be confident that your final custom stainless steel basket will be hygienic and simple to clean, however, you intend to use it.
Increases Corrosion Resistance
The corrosion resistance of stainless steel, which already has this property, is improved by passivation. The surface of the stainless steel is unipotentialized by oxygen absorption and develops an oxide coating. The result is that the metal corrodes at a low rate that is desirable.
What Is Electropolishing?
During the electropolishing procedure, which makes use of an electric current and an electrolyte bath heated to a specific temperature, the material’s surface layer dissolves. This process results in a surface that is featureless and smooth. In addition to the food and pharmaceutical industries, electropolishing is frequently used in the manufacturing of semiconductors. The smoothness of the finish virtually eliminates any small imperfections where debris might typically adhere, making the material nearly completely nonstick.
3 Benefits of Electropolishing Stainless Steel
Enhanced Surface Appearance
Electropolished stainless steel surfaces have a clean, shiny appearance. The sterility of the stainless steel tool, basket, or component can thus be easily determined. Additionally, it enhances weldability without lowering the hardness of the surface or resulting in peeling or abrading.
Better Corrosion Resistance
The most resistance to tarnishing and corrosion is produced by electropolishing in various metals and alloys. The electropolished steel baskets from Marlin can be used in demanding conditions with the assurance that they won’t tarnish or corrode soon.
Improved Sanitation Control
Electropolishing smooths out surfaces by filling in tiny fissures where impurities might hide. Applications made of stainless steel used in the medical or pharmaceutical industries must be easy to sanitize in order to prevent the spread of bacteria and viruses. On medical equipment, surfaces that are uneven or rough may hold bacteria. The likelihood of contamination and the spread of bacteria, viruses, and other organisms is thus increased.
What Is Natural Finish?
A natural polish gives stainless steel a natural appearance. This suggests that no surface augmentation or protection has been carried out. The surface appears dull grey and is hardly reflective. It functions best in applications that are concealed or where aesthetics are not important.
Why Finish Stainless Steel?
To withstand environmental factors such as dust, corrosive chemicals, solvents, and dust.
To get a smooth, shiny finish. It matters if you use stainless steel products for manufacturing, in the lab, or in the medical field.
It makes it easy to clean the surface. Since stainless steel with a polished finish is easier to clean than stainless steel with a natural finish, this is important when using stainless steel in food production.
To make them more resistant to being hit, worn down, corroded, and scratched.
Choosing the Right Finish for Your Custom Metal Basket Applications
Electropolishing is frequently faster, easier to control, and readily adaptable to different stainless steel alloys. It provides a better finish and eliminates passivation-related stains. However, electropolishing isn’t always the best option. One of the key advantages of passivation is its capacity to alter the composition of the oxide layer that protects stainless steel from corrosion. In some cases, the design of the oxide layer can be improved to improve the corrosion resistance of the steel.
Depending on how the stainless steel will be used, you should choose between electropolishing and passivating it. The finest option if you need a faultless, flaw-free surface that is also simple to clean is electropolishing. If you need to effectively remove surface contaminants without affecting the metal’s corrosion resistance properties, passivation may be a better option for you.
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What Role Does Steel Play In The Furniture Industry? : There is no other reason to doubt the claim that rising market demand will lead to significant industry growth in the steel sector. Present circumstances make it abundantly clear that steel is necessary for higher-quality products in all market segments.
Selecting Metals and Alloys for Medical Device Manufacturing: The work quality of metal component manufacturers who supply the medical device industry has recently improved significantly. The product quality of these alloys has never been better since the implementation of statistical process control, ISO 9000 certifications, and other initiatives.
by kalpataru | Dec 3, 2022 | Blog
Introduction
There is no other reason to doubt the claim that rising market demand will lead to significant industry growth in the steel sector. Present circumstances make it abundantly clear that steel is necessary for higher-quality products in all market segments. The presence of steel is one of the most crucial metrics for determining the efficacy and lifetime of a product.
Steel is essential to several industries, including the furniture industry. Many products utilized in the furniture industry are made of steel. Steel offers the possibility to ensure that the finished product is of the highest caliber due to its stronger tensile strength and longer lifespan. We may therefore claim that steel provides a stable foundation for the production of several steel sector items. Furniture goods made with the aid of steel are appealing to both small and large businesses that deal with the provision of furniture.
Various products made up of steel that is used in the Furniture industry
Multiple steel components are used in the construction of many furniture industry products. The finished items benefit from the strength, shape, credibility, and durability provided by these steel materials. The following is a list of the various products:
Table Frame
Table frames are frequently constructed with as much steel as is practical. This is done to give the tables the illusion of being more sturdy by including steel components. The manufacturer can construct a variety of table designs thanks to a robust table structure.
Chair Frame
Similar to table frames, chair frames are made with a lot of steel. The weight and tension must be supported by a strong enough chair frame. This is made possible by the presence of steel components in it. Many different decorative chair frame designs may contain a significant amount of steel. It gives the chair frames a strong, durable appearance.
Curtain rods
There are many different types of rods available, each having a different shape, size, and measurement. If you look closely, you might see that steel also contributes to the production of these rods. The steel components help to increase the tensile strength and durability of the rods.
Decorative Tube Frames
Additionally, steel is used to create a variety of decorative tube frames. It is polished and attractive without compromising the integrity of the tubes thanks to the use of steel. There are numerous varieties of steel parts available on the market that offer both great appearances and performance.
Other products
In addition to the previously stated furniture-related products, steel is also widely employed in many other products. Bedside lights, table lamps, and lamps are all made of steel.
To conclude
There are many benefits to steel’s contribution to the furniture industry. There is no denying that the furniture industry has an increasing need for steel producers. This has encouraged numerous businesses to successfully enter the steel manufacturing industry for the furniture sector.
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All you need to know about Grade 304 Stainless Steel: 304 Stainless Steel, also called 304, is a type of steel that is used to make a wide range of appliances and long-lasting items. It is an all-purpose steel alloy that can be used for many different things.
Benefits of Stainless Steel 310 Sheets: Austenitic stainless steel in Grade 310 is easy to weld and bend, and it has great properties at high temperatures. Type 310 stainless steel tubing is often used in situations with high temperatures.
by kalpataru | Nov 26, 2022 | Blog
After a challenging September quarter, the profitability of domestic steel makers in the October-December quarter is expected to improve on the back of increased demand and lower input costs, analysts said.
Analysts see a ray of hope in the December quarter for Indian steel companies on better domestic demand conditions.
“The financial performance of Indian steel companies in the second quarter of the current fiscal has been adversely impacted by falling steel prices on one hand, and high raw material prices, especially coking coal, on the other.
“However, their profitability is expected to improve in the third quarter of FY2023, given lower coking coal costs, and an expected pick-up in capacity utilization rates on the back of better domestic demand conditions,” Roy added.
In the July-September 2022, the top five steel makers of India — which control about 60 percent market — have either reported loss or posted sharp falls in their net profits citing adverse market conditions
According to Kaustubh Chaubal, Senior Vice President, Corporate Finance at Moody’s Investors Service, leading steelmakers reported dampened earnings for a seasonally weak July-September period, amid elevated input and other costs and a steep decline in steel prices.
“Even so, India remains a bright spot in the region, with a high-single-digit percentage growth in steel consumption over the next 12 months supported by demand for autos and continued infrastructure spending by the government,” Chaubal said.
Suman Chowdhury, Chief Analytical Officer, Acute Ratings & Research said raw material prices that increased due to supply constraints are set to moderate in the second half of the current fiscal while steel prices are expected to witness a firmness due to a seasonal pickup in demand.
“We believe that the profitability scenario in the steel sector will improve moderately over the next two quarters,” Chowdhury added.
Echoing similar sentiments, Manish Gupta, Senior Director, CRISIL Ratings Limited said “Going forward, we see steel prices to remain range-bound in the second half as weak global steel demand gets offset by healthy domestic steel demand, which is expected to grow 6-8 percent this fiscal.”
In July-September, state-owned SAIL slipped into the red posting a consolidated loss of Rs 329 crore. It had clocked Rs 4,338.75 crore net profit during the same period of the preceding fiscal.
JSW Steel also reported a consolidated net loss of Rs 915 crore for the quarter that ended September 30, 2022. The company had clocked Rs 7,179-crore net profit in the year-ago period
Tata Steel’s consolidated net profit fell 90 percent to Rs 1,297 crore in the quarter, from Rs 12,547.70 crore in the corresponding period of the previous financial year.
ArcelorMittal Nippon Steel (AM/NS) India posted earnings before interest, taxes, depreciation, and amortization (EBITDA) of USD 204 million during the quarter under review against USD 551 million a year ago.
The net profit of Jindal Steel and Power Limited (JSPL) shrinked to Rs 219 crore as against Rs 2,678 crore.
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Padma Bridge in Bangladesh is the longest spanning the Ganges: The 6-kilometer-long, steel-constructed Padma Bridge is a game-changer for Bangladesh, as it connects 21 southwestern districts to the country’s capital and boosts the economy.
How is India planning to decarbonize the steel industry: As one of the most significant materials for engineering and construction, steel is used in many aspects of our life. Steel is one of the most important components of modern society.
by kalpataru | Nov 15, 2022 | Blog
What is Ductility?
The ductility of a material is its ability to permanently deform in response to stress (e.g., stretch, bend, or spread). For example, the majority of common steels are highly ductile and resistant to localized stress concentrations.
Due to their lack of ductility, brittle materials such as glass cannot withstand stress concentrations and break easily. Under pressure, a material specimen initially deforms elastically, but once it reaches a certain deformation (known as the elastic limit), the deformation becomes permanent.
In materials research, ductility is the degree to which a material can withstand plastic deformation under tensile stress before failing.
In engineering and manufacturing, ductility is essential for determining a material’s suitability for particular manufacturing processes (such as cold working) and its resistance to mechanical stress. Gold and copper are typical examples of ductile substances.
The malleability of a material, a related mechanical property, is determined by its ability to deform plastically without breaking under compressive force. In the past, materials were considered malleable if they could be hammered or rolled into desired shapes. Lead is a material that is somewhat malleable but not ductile.
Examples
The majority of metals, including gold, silver, copper, erbium, terbium, samarium, aluminum, and steel, are examples of ductile materials. The metals tungsten and high-carbon steel are examples of non-ductile materials. Generally speaking, nonmetals are not ductile.
How to Measure Ductility
The ductility of a metal is its ability to undergo deformation without cracking. Metals that are ductile are capable of being pushed or shaped without cracking. Metals that are brittle can break (essentially the opposite of ductile).
Formability is substantially affected by ductility. Extremely brittle metals may not be able to be manufactured satisfactorily. For instance, a metal must possess a certain degree of ductility in order to be stretched into a thin wire.
If the metal is too brittle, it will shatter as soon as it begins to expand. Ductility is another essential safety factor for structural formations. When structures are subjected to heavy stresses, ductility allows them to bend and deform without breaking.
There are two ways to evaluate ductility: percentage elongation and percentage reduction.
During a tensile test, when a metal is dragged until it breaks, its length deforms as a percentage of its original length and is measured as percentage elongation.
The percentage decrease of a specimen’s narrowest cross-section after a tensile test-induced rupture.
The temperature has an effect on plasticity. Consequently, it is crucial to consider the temperatures the metal will encounter in a given application. A chart depicting the transition temperature between ductile and brittle for the majority of metals is available and valuable.
Which Metals Are Ductile?
Aluminum, brass, copper, low-carbon steel, gold, silver, tin, and lead are examples of ductile metals. The metals wrought iron, chromium, and tungsten are examples of brittle materials. Cables, stampings, and structural beams are examples of applications that require high ductility.
Materials Science
Gold is exceptionally malleable. It can be stretched until it breaks and transforms into a single-strand wire.
Under stress, it is impossible to manipulate materials using metal-forming operations such as hammering, rolling, drawing, or extrusion with materials that crack, break or shatter. Materials that are brittle can be cast or thermoformed, whereas materials that are malleable can be formed by stamping or pressing.
Metallic bonds, which are predominant in metals and confer high degrees of ductility, lend metals their reputation for being generally ductile. In metallic bonds, valence shell electrons are delocalized and shared by multiple atoms.
Delocalized electrons allow metal atoms to slide past one another, preventing other materials from shattering due to strong repulsive interactions.
The ductility of steel varies depending on the alloying elements. As carbon content increases, ductility decreases. Many amorphous solids and polymers, such as Play-Doh, can be deformed. Gold is the most ductile metal, while platinum is the most malleable.
Through the formation, reorientation, and migration of dislocations and crystal twins, such metals deform under intense stretching without appreciable hardening.
Factors That Affect the Ductility of Metals:
Both internal and external factors, such as composition, grain size, cell structure, etc., and hydrostatic pressure, temperature, previously experienced plastic deformation, etc., influence ductility.
Below are a few crucial points regarding ductility:
Compared to metals with HCP crystal structures, those with FCC and BCC crystal structures exhibit superior high-temperature ductility.
The grain size has a significant effect on ductility. On a scale of a few microns, many alloys exhibit superplastic behavior when the grain size is excellent.
Higher oxygen content decreases the ductility of steel. Even relatively low levels of impurities have a significant impact on the ductility of some alloys. At approximately 1040°C, the ductility of carbon steels containing sulphur impurities as small as 0.018% decreases rapidly. However, if the Mn concentration is high, this can be corrected. At 1040 °C, the Mn/S ratio is what determines the ductility of carbon steels. When this ratio is 2, the elongation percentage at 1040 °C is only 12-15%, but when it is 14, it is 110 percent.
The temperature has a substantial effect on ductility and, by extension, formability. It promotes ductility in general, but at certain temperatures, it may decrease due to phase transition and microstructural changes induced by temperature rise. Temperature influences the ductility of stainless steel.
At 1050 °C, it is least ductile, and at 1350 °C, it is most ductile. Consequently, its hot operating range is quite constrained.
Hydrostatic pressure improves the ductility of a material. In torsion testing, the length of the specimen decreases as the strength of the torsion increases. In the torsion test, the specimen demonstrates greater ductility when subjected to axial compressive stress than when none is applied. The application of axial tension further diminishes ductility.
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Learn About The Applications Of Alloy 20 Pipes: Alloy 20 is one of the “Super” stainless steels with the highest acid attack resistance. The presence of nickel, chromium, molybdenum, and copper increases the material’s resistance to chloride stress corrosion, which can lead to cracking and general pitting. Columbium is added to the alloy to prevent carbide precipitation during welding.
Selecting Metals and Alloys for Medical Device Manufacturing: The work quality of metal component manufacturers who supply the medical device industry has recently improved significantly. The product quality of these alloys has never been better since the implementation of statistical process control, ISO 9000 certifications, and other initiatives.
by kalpataru | Nov 1, 2022 | Blog
Introduction
Alloy 20 is one of the “Super” stainless steels with the highest acid attack resistance. The presence of nickel, chromium, molybdenum, and copper increases the material’s resistance to chloride stress corrosion, which can lead to cracking and general pitting. Columbium is added to the alloy to prevent carbide precipitation during welding.
It is simple to manufacture and possesses robust mechanical properties. Although the alloy was designed for use in industries involving sulfuric acid, it is most commonly used in the chemical processing industry. In addition, pharmaceuticals, meats, oils, plastics, explosives, and synthetic fibers are utilized in manufacturing.
This superior alloy is also required for high-temperature exchangers, combining tanks, metal cleaning, pickling equipment, and pipe construction. Compared to higher nickel-based alloys, Alloy 20 Pipe may reduce production costs for standard stainless steel.
What distinguishing qualities do Alloy 20 pipes have?
You should be aware of the fact that pipes made from alloy 20 possess a number of exemplary qualities. These is what they consist of:
They are more resistant to stress-corrosion cracking in sulfuric acid (20–40%) at boiling temperatures.
The corrosion resistance of Alloy 20 pipes to sulfuric acid and chloride stress corrosion cracking is exceptional.
In addition, they have superior fabricability, mechanical properties, and low carbide precipitation during welding.
What is the use of Alloy 20 Pipes?
Common applications for Alloy 20 pipes include pickling racks, tanks, valves, SO2 scrubbers, food and dye production, chemical and related industries, heat exchangers, and other harsh environments.
Numerous industrial applications, such as food production, construction, chemistry, petrochemistry, pharmaceuticals, oil exploration, power generation, pulp, and paper industries, condensers, and heat exchangers, use alloy 20 pipes.
Alloy 20 pipes are utilized in numerous industries, including chemical manufacturing, petrochemical and refining, maritime, pharmaceutical, and food processing. Storage tanks, mixing tanks, agitators, pump and valve modules, food processing machinery, fasteners, and fittings are examples of end-use applications. Applications are limited to a maximum temperature of 1000 degrees Fahrenheit per ASME. It is essential to determine whether the required corrosion resistance can be achieved in the present environment.
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The Applications and Benefits of Using Stainless Steel 310 Pipes: Austenitic stainless steel in Grade 310 has outstanding high-temperature characteristics in addition to having strong ductility and weldability.
What is Scheduled 40 Steel Pipe?: The most common pipe schedule is Schedule 40 steel pipe. It can be galvanized but isn’t required, and it’s commonly used in water and gas lines. It can also show up in spots that require decoration or support.
by kalpataru | Oct 21, 2022 | Blog
The 6-kilometer-long, steel-constructed Padma Bridge is a game-changer for Bangladesh, as it connects 21 southwestern districts to the country’s capital and boosts the economy.
Padma River is a major Ganges tributary that originates in the Gangotri glacier in the Himalayas, flows through India and Bangladesh, and empties into the Bay of Bengal.
The Padma, one of the most traveled waterways in the world, has a broad riverbed that divides into numerous channels dotted with shifting islands and sandbanks. While navigable throughout the year, the rainy season makes river navigation increasingly difficult.
During heavy downpours, this could isolate the entire southwest of Bangladesh from the nearby capital and the rest of the country for all but the most courageous and skilled travelers.
With this in mind, the Bangladeshi government embarked on a massive infrastructure initiative to ensure a safe, year-round crossing of the Padma and to improve access to and from the southwest by connecting road and rail networks.
Making connections with steel
The Padma Bridge, constructed at a cost of $3.6 billion, is 22 meters wide and 6.15 kilometers long, making it the longest spanning the Ganges. It is a two-level steel truss bridge that carries a four-lane highway on its upper level and a single-track railroad on its lower level.
In addition to providing rail and road connections, the bridge also carries vital utilities, including telecommunications lines and stainless steel high-pressure gas pipes. There are plans to equip the bridge with seven 400kv steel-latticed interconnector towers so that it can transmit electricity.
Padma Bridge is a triumph of steel-built engineering that is expected to add between 1-2% to the country’s GDP
The bridge’s structure consists of 41 150-meter-long connecting spans. These are supported by 42 piers with 262 high-strength steel piles as foundations. These steel tubes with a 3m diameter are driven up to 100m into the earth to support the massive length of the bridge as well as the weight of road and rail traffic.
This steel core enables the piers and their foundations to withstand all conceivable stresses, ranging from liquefaction of the riverbed to impacts from river vessels to earthquakes – a crucial factor in seismically active Bangladesh, which sits at the intersection of multiple active tectonic plate boundaries.
The awe-inspiring Padma Bridge, which represents a sea change for Bangladesh’s infrastructure, is a triumph of steel-built engineering that is expected to add between 1% and 2% to the country’s GDP and establishes a benchmark for investment.
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What is Food-grade stainless steel and its benefits?: Steel is commonly used in Indian houses for cooking and eating since it is inexpensive, durable, and resistant to rust. Do we truly know whether the stainless steel we use is safe for our bodies, despite its widespread use in the home?
Selecting Metals and Alloys for Medical Device Manufacturing: The work quality of metal component manufacturers who supply the medical device industry has recently improved significantly.
