Inconel 625 Pipes & Tubes — UNS N06625 Seamless & Welded Supplier, India

Inconel 625 Seamless Pipes & Tubes

Table of Content

Kalpataru Piping Solutions offers Inconel 625 Seamless / Welded pipes & tubes as per material standard ASTM B444 / ASME SB444, with material identification numbers of UNS N06625 (W.Nr. 2.4856), in Grade 1 & Grade 2 varieties. Kalpataru is the Manufacturer and supplier of Inconel 625 Pipe in India, Saudi ARAMCO approved, with Stock in Mumbai and Exporting to over 40 nations for more than 25 Years. It is available in different sizes ranging from 1/8” NB to 48” NB, 5S to XXS Sch. EN 10204. Due to all these features this material is commonly used in different industries such as petrochemical, automobile, healthcare and many more. We are the major and most trusted supplier of Inconel 625 Pipes and tubes in different sizes and forms according to the user requirements.

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Inconel 625 Grade 1 vs Grade 2: Which to Specify?

ASTM B444 / ASME SB444 defines two heat treatment grades for Inconel 625 seamless pipes & tubes. Specifying the wrong grade is a common procurement error. Use this table to specify correctly:

Factor Grade 1 (Annealed) Grade 2 (Solution Annealed)
Heat Treatment Annealed, lower temperature treatment Solution annealed at higher temperature (~1150 degrees C)
Primary Use Moderate temperature service (up to ~593 degrees C) High-temperature service (593 degrees C to 982 degrees C)
Grain Structure Fine-grained; higher tensile/yield strength Coarser grain; better creep/rupture strength
Tensile Strength (min) 120 ksi (827 MPa) 100 ksi (690 MPa)
Yield Strength (min) 60 ksi (414 MPa) 40 ksi (276 MPa)
Elongation (min) 30% 30%
Typical Applications Chemical processing, ambient/moderate temp piping Aerospace, power generation, high-temp furnace components
ASTM Reference ASTM B444 Grade 1 ASTM B444 Grade 2

Inconel 625 Material Specifications — Inconel 625 Composition, Mechanical and Physical Properties (UNS N06625 / W.Nr. 2.4856)

Inconel 625 Chemical Composition (UNS N06625)

Full elemental Inconel 625 composition per ASTM B444 (UNS N06625, W Nr 2.4856, SB 444 N06625)

Element

Symbol

Content (% by weight)

Role

Nickel

Ni

58.0% min

Base element, corrosion and oxidation resistance

Chromium

Cr

20.0 to 23.0%

Oxidation and high-temperature corrosion resistance

Molybdenum

Mo

8.0 to 10.0%

Pitting and crevice corrosion resistance; solid solution hardening

Niobium + Tantalum

Nb + Ta

3.15 to 4.15%

Weld stabilization; prevents sensitization; strengthening

Iron

Fe

5.0% max

Residual, kept low for corrosion performance

Cobalt

Co

1.0% max

Residual

Manganese

Mn

0.50% max

Residual

Silicon

Si

0.50% max

Residual

Carbon

C

0.10% max

Low carbon, minimizes carbide precipitation

Titanium

Ti

0.40% max

Residual

Aluminum

Al

0.40% max

Residual

Inconel 625 Material Properties: Mechanical

Property

Grade 1 (Annealed)

Grade 2 (Solution Annealed)

Typical Value

Tensile Strength (min)

827 MPa (120 ksi)

690 MPa (100 ksi)

930 MPa typical

Yield Strength 0.2% (min)

414 MPa (60 ksi)

276 MPa (40 ksi)

517 MPa typical

Elongation (min)

30%

30%

42.5% typical (50mm gauge)

Hardness (max)

241 HB / 100 HRB

241 HB / 100 HRB

241 HB / 100 HRB

Density

8.44 g/cm3

8.44 g/cm3

0.305 lb/in3

Melting Point

1290 to 1350 degrees C

1290 to 1350 degrees C

2350 to 2460 degrees F

Elastic Modulus

207 GPa (30.1 x 10^3 ksi)

207 GPa

At room temperature

Poisson’s Ratio

0.278

0.278

—

Thermal and Physical Properties at Various Temperatures 

Property

21 degrees C (70 degrees F)

204 degrees C (400 degrees F)

427 degrees C (800 degrees F)

538 degrees C (1000 degrees F)

Thermal Conductivity (Btu*in/h*ft2*degrees F)

68

87

109

139

Specific Heat (Btu/lb*degrees F)

0.098

0.109

0.122

0.118

Thermal Expansion (x10^-6/degrees F)

—

7.3

7.6

7.7

Elastic Modulus (x10^3 ksi)

30.1

28.7

26.9

25.7

Inconel 625 Equivalent Grades and Standards

Standard Designation
UNS N06625
DIN / Werkstoff Nr. 2.4856
EN NiCr22Mo9Nb
JIS NCF 625
BS NA 21
GOST EP718 (XH75MDT)
AFNOR NC22DNb

Inconel 625 Pipes & Tubes ASTM Standards

We supply Inconel 625 seamless pipes and tubes to ASTM B444 and welded pipes to ASTM B705 and some of the most common ASTM standards are listed below. 

Standard Scope Product Form
ASTM B444 / ASME SB444 Seamless nickel-alloy (UNS N06625) pipe and tube, primary pipe standard Seamless pipes and tubes
ASTM B705 / ASME SB705 Nickel-alloy welded pipe Welded pipes
ASTM B446 / ASME SB446 Nickel-chromium-molybdenum-niobium alloy rod and bar Round bar (for fittings)
ASTM B564 / ASME SB564 Nickel alloy forgings Flanges and forged fittings
ANSI B36.19M Stainless steel pipe dimensions (applied to nickel alloy) Dimensional standard
ANSI B36.10M Wrought steel pipe dimensions Dimensional standard
API 5L Line pipe specification Oil and gas line pipe
EN 10216-5 Seamless pressure tubes, austenitic and duplex European equivalent

Inconel 625 Pipe Dimensions, Schedules and Weight Chart

Inconel 625 Pipe Sizes: NPS Range, Schedule and Wall Thickness

Inconel 625 pipe sizes per ASTM B444 range 1/8″ to 24″ NB seamless, up to 48″ NB EFW welded. Nickel alloy 625 small diameter tubing and nickel alloy 625 tubing from 1/16″ OD are available in coil or cut-to-length form. See the manufacturing range table below.

Schedule Wall Thickness Range NPS Range Available Typical Application
SCH 5S / 5 Light wall, 1.65mm to 2.77mm 1/2″ to 24″ NB Low-pressure instrumentation, sampling lines
SCH 10S / 10 1.65mm to 4.19mm 1/2″ to 24″ NB General process piping, offshore topsides
SCH 40S / 40 2.77mm to 15.09mm 1/2″ to 24″ NB Standard process piping, chemical plants
SCH 80S / 80 3.73mm to 26.19mm 1/2″ to 24″ NB High-pressure service, hydraulic systems
SCH 160 4.75mm to 40.46mm 1/2″ to 16″ NB Very high-pressure or corrosive service
SCH XXS 7.47mm to 22.23mm 1/2″ to 8″ NB Extreme pressure, subsea, downhole
Heavy Wall Custom Up to 100mm wall 10mm to 600mm OD Pressure vessels, thick-wall manifolds

 

Schedule 40 Weight Chart: Inconel 625 Pipes (Density 8.44 g/cm3) 

NPS (in) DN (mm) OD (mm) Schedule Wall Thickness (mm) Weight (kg/m)
1/2″ 15 21.3 SCH 40 2.77 1.35
3/4″ 20 26.7 SCH 40 2.87 1.80
1″ 25 33.4 SCH 40 3.38 2.68
1-1/2″ 40 48.3 SCH 40 3.68 4.33
2″ 50 60.3 SCH 40 3.91 5.82
3″ 80 88.9 SCH 40 5.49 12.06
4″ 100 114.3 SCH 40 6.02 17.18
6″ 150 168.3 SCH 40 7.11 30.20
8″ 200 219.1 SCH 40 8.18 45.48

 

Manufacturing Range Summary

Product Type OD Range Wall Thickness Length Standard
Seamless Pipe 1/8″ to 24″ NB (4mm to 610mm) 0.5mm to 20mm Single/Double Random; Cut-to-Length up to 6m ASTM B444
Welded / ERW Pipe 1/2″ to 24″ NB 1.0mm to 15mm Up to 6 metres ASTM B705
EFW Large Diameter Pipe 6″ to 48″ NB 1.5mm to 25mm Up to 26 metres ASTM B705
Heavy Wall Pipe 10mm to 600mm OD 2.5mm to 100mm 0.5 to 12 metres Custom / ASTM B444
Instrumentation Tubing 1/16″ to 2″ OD (1.6mm to 50.8mm) 0.25mm to 9.5mm Cut-to-length / Coil ASTM B444

 

Pressure Ratings for Inconel 625 Pipes at Elevated Temperatures

The table below shows maximum internal working pressures (PSI) for selected Inconel 625 pipe sizes at various operating temperatures. Pressure ratings decrease at elevated temperatures. Always consult our engineering team for project-specific pressure/temperature design.

Size (mm OD x WT) 38 deg C (100 deg F) 93 deg C (200 deg F) 204 deg C (400 deg F) 316 deg C (600 deg F) 427 deg C (800 deg F) 538 deg C (1000 deg F)
3 x 0.5 940 psi 940 psi 930 psi 921 psi 907 psi 888 psi
6 x 1 940 psi 940 psi 930 psi 921 psi 907 psi 888 psi
8 x 2 1,476 psi 1,476 psi 1,462 psi 1,447 psi 1,425 psi 1,395 psi
12 x 1 440 psi 440 psi 435 psi 431 psi 424 psi 415 psi
16 x 1 324 psi 324 psi 321 psi 318 psi 313 psi 307 psi

Alloy 625 Seamless Pipe vs Welded Pipe

Alloy 625 seamless pipe (ASTM B444) and Inconel 625 welded pipes and Inconel 625 welded tubes (ASTM B705) serve different pressure and size requirements:

Factor Seamless Inconel 625 Pipe Welded Inconel 625 Pipe
Manufacturing Extruded or rotary-pierced from solid billet; no seam Rolled plate/strip formed and longitudinally welded
Pressure Capability Higher, no weld zone; preferred for critical high-pressure service Slightly lower; weld zone is the design limit
Size Range 1/8″ NB to 24″ NB (standard) Up to 48″ NB via EFW, unique advantage for large OD
Cost Higher More cost-effective for large diameter and long runs
Post-Weld Heat Treatment N/A Not required, Alloy 625 weld zone retains full corrosion resistance
Best Applications Aerospace ducting, nuclear, subsea, high-pressure chemical FGD scrubbers, offshore risers, large-bore chemical lines
Standard ASTM B444 / ASME SB444 ASTM B705 / ASME SB705

Applications and Industries Served

As certified alloy 625 suppliers to the oil and gas, aerospace, and chemical sectors, we serve six major industry verticals with ex-stock inventory and project-specific supply from Mumbai:

Aerospace and Gas Turbine
Aircraft ducting, engine exhaust and nacelle components, thrust-reverser systems. Turbine shroud rings, fuel and hydraulic lines operating at 600 to 982 degrees C. Grade 2 (solution annealed) specified for creep-critical aerospace components.

Chemical Processing and Petrochemical
Reaction vessels, distillation columns, and transfer piping handling phosphoric acid, nitric acid, and alkali solutions. SS 316L is often upgraded to Alloy 625 where chloride concentrations exceed 1,000 ppm. Heat exchanger and condenser tubing in aggressive multi-phase chemical environments.

Marine and Offshore
Subsea flowlines, umbilicals, and wellhead piping where seawater exposure is constant. Propeller shafts, submarine hull penetrations, and auxiliary propulsion motor shafts. FPSO piping systems and offshore riser connections, both seamless and large-diameter welded.

Oil and Gas
Downhole tubing and wellhead components in sour service (H2S environments) per NACE MR0175. Refinery heat exchanger bundles, tube-side in overhead systems with chloride-rich condensates. Saudi ARAMCO approved supplier, regularly supplied to major Gulf region oil and gas projects. Among certified Inconel 625 pipe manufacturers in India, Kalpataru Piping is Saudi ARAMCO approved and stocks Grade 1 and Grade 2. We stock Inconel 625 pipes in India, ex-warehouse Mumbai, standard sizes dispatched within 2 to 5 business days.

Pollution Control and Flue Gas Desulfurization (FGD)
Scrubber bodies, dampers, ductwork, and stack liners in coal-fired power plant FGD systems. Resists corrosive sulfur dioxide and chloride-laden flue gas at elevated temperatures. Large-diameter welded Inconel 625 pipes (EFW, 6″ to 48″ NB) used for main scrubber headers.

Power Generation
Boiler expansion joints, superheater piping, and heat recovery steam generator (HRSG) tubing. Nuclear steam generator tubes and reactor coolant piping where stress-corrosion cracking resistance is critical.

For Inconel 625 pipe fitting manufacturers in India, see our Inconel 625 Buttweld Fittings and Forged Fittings pages. For flow control components, see our Inconel 625 Instrumentation Valves page.

Welding Inconel 625 Pipes: Process and Parameters

One of the most significant fabrication advantages of Inconel 625 is that it does NOT require post-weld heat treatment (PWHT), unlike Inconel 718. The weld zone retains corrosion resistance equivalent to the base material, reducing fabrication cost and complexity. For matching filler material, see our Inconel 625 Filler Wire (ERNiCrMo-3) page.

Stage Process / Consideration Key Parameter
Pre-weld Cleaning Remove all oils, marking inks, and surface contamination Use acetone or alcohol; do NOT use chlorinated solvents
Fit-Up Ensure proper alignment and root gap Typical root gap: 1.6mm for GTAW backing pass
Preheat Generally not required Max 93 degrees C (200 degrees F) if preheat is applied
GTAW / TIG (root pass) Preferred for root and thin-wall passes; highest quality Filler: AWS ERNiCrMo-3; Shielding: 100% Argon
GMAW / MIG (fill and cap) Higher deposition for fill passes on thicker sections Filler: AWS ERNiCrMo-3; Argon/He mix shielding
SMAW / Stick (field repairs) For on-site and maintenance welding Electrode: ENiCrMo-3; DC Reverse Polarity
Submerged Arc (production) Automatic/semi-automatic for large diameter pipe High deposition; requires qualified flux
Post-weld cooling Air cool naturally Do NOT water quench
Post-weld inspection Visual + NDT per applicable code DP/PT, UT, radiography as required
Post-weld cleaning Remove heat tint; passivate if required Pickling paste or electropolish

Quality Assurance and Testing

Every Inconel 625 seamless pipe and Inconel 625 seamless tube is subjected to the following tests before dispatch from our Mumbai warehouse. We are Saudi ARAMCO approved and certified for inconel 625 pipes & tubes exporters

Test Type Standard / Method Purpose
PMI Testing Positive Material Identification Verify Ni (58% min), Cr, Mo, Nb content per heat
Chemical Analysis Spectro / OES per ASTM E415 Confirm all elemental composition within ASTM B444 limits
Tensile Testing ASTM A370 Verify tensile strength >= 827 MPa (Gr.1) / 690 MPa (Gr.2)
Yield Strength ASTM A370 Verify 0.2% offset yield >= 414 MPa (Gr.1) / 276 MPa (Gr.2)
Intergranular Corrosion (IGC) ASTM G28 Method A Confirm sensitization resistance in weld-affected zones
Ultrasonic Testing (UT) ASTM E213 Detect internal defects in seamless pipes
Hydrostatic Testing ASTM A999 100% leak-proof pressure test on every pipe
Radiography (welded) ASTM E94 100% weld seam integrity verification
Pitting Resistance ASTM G48 Method A Localized corrosion resistance assessment
Flattening / Flaring ASTM E8 / E290 Ductility and weld quality assessment

Documentation Provided with Every Shipment

  • EN 10204 3.1 Mill Test Certificates (MTC), Factory certificate with manufacturer’s declaration.
  • EN 10204 3.2 available, Third Party Inspection (TPI) by independent agencies on request.
  • NABL-approved laboratory chemical and mechanical test reports.
  • PMI test reports, elemental verification on each pipe.
  • Heat traceability records, raw material to finished product.
  • Hydrostatic and NDT test records.
  • Heat treatment charts (annealing / solution treatment records).
  • Fumigation certificate and Certificate of Origin for international shipments.
  • Commercial Invoice with HS Code 75071200 for customs clearance.

Inconel 625 Pipe Price in India (2026) — Inconel 625 Tube & Inconel 625 Tubing Indicative Rates

Inconel 625 pipe price and Inconel 625 tubing price are LME-linked and vary by OD, schedule, condition (Grade 1 or Grade 2), and order quantity. The indicative price table below covers the most commonly ordered product forms. Submit an RFQ for a firm price valid 7 to 14 business days.

Product Form Size Range Indicative Price (INR/kg) Indicative Price (USD/kg)
Seamless Pipe (SCH 40) 1/2″ to 4″ NB Rs. 3,800 to Rs. 5,000 USD 46 to 60
Seamless Pipe (SCH 80) 1/2″ to 4″ NB Rs. 4,200 to Rs. 5,800 USD 50 to 70
Welded / ERW Pipe 1″ to 12″ NB Rs. 3,200 to Rs. 4,500 USD 38 to 54
Heavy Wall Pipe Custom OD/WT On request On request
Instrumentation Tubing 1/16″ to 2″ OD Rs. 4,500 to Rs. 6,500 USD 54 to 78

Welding Inconel 625 Pipes: Process and Parameters

One of the most significant fabrication advantages of Inconel 625 is that it does NOT require post-weld heat treatment (PWHT), unlike Inconel 718. The weld zone retains corrosion resistance equivalent to the base material, reducing fabrication cost and complexity. For matching filler material, see our Inconel 625 Filler Wire (ERNiCrMo-3) page.

Stage

Process / Consideration

Key Parameter

Pre-weld Cleaning

Remove all oils, marking inks, and surface contamination

Use acetone or alcohol; do NOT use chlorinated solvents

Fit-Up

Ensure proper alignment and root gap

Typical root gap: 1.6mm for GTAW backing pass

Preheat

Generally not required

Max 93 degrees C (200 degrees F) if preheat is applied

GTAW / TIG (root pass)

Preferred for root and thin-wall passes; highest quality

Filler: AWS ERNiCrMo-3; Shielding: 100% Argon

GMAW / MIG (fill and cap)

Higher deposition for fill passes on thicker sections

Filler: AWS ERNiCrMo-3; Argon/He mix shielding

SMAW / Stick (field repairs)

For on-site and maintenance welding

Electrode: ENiCrMo-3; DC Reverse Polarity

Submerged Arc (production)

Automatic/semi-automatic for large diameter pipe

High deposition; requires qualified flux

Post-weld cooling

Air cool naturally

Do NOT water quench

Post-weld inspection

Visual + NDT per applicable code

DP/PT, UT, radiography as required

Post-weld cleaning

Remove heat tint; passivate if required

Pickling paste or electropolish

Quality Assurance and Testing

Every Inconel 625 pipe and tube from Kalpataru Piping is subjected to a comprehensive quality programme conducted by an independent Quality Control department. We are a certified vendor to leading OEMs and our materials are Saudi ARAMCO compliant. Technical specifications reviewed by Kalpataru Piping QA and metallurgical engineering team, ISO-certified with 25+ years nickel alloy supply experience.

 

Test Type Standard / Method Purpose
PMI Testing Positive Material Identification Verify Ni (58% min), Cr, Mo, Nb content per heat
Chemical Analysis Spectro / OES per ASTM E415 Confirm all elemental composition within ASTM B444 limits
Tensile Testing ASTM A370 Verify tensile strength >= 827 MPa (Gr.1) / 690 MPa (Gr.2)
Yield Strength ASTM A370 Verify 0.2% offset yield >= 414 MPa (Gr.1) / 276 MPa (Gr.2)
Intergranular Corrosion (IGC) ASTM G28 Method A Confirm sensitization resistance in weld-affected zones
Ultrasonic Testing (UT) ASTM E213 Detect internal defects in seamless pipes
Hydrostatic Testing ASTM A999 100% leak-proof pressure test on every pipe
Radiography (welded) ASTM E94 100% weld seam integrity verification
Pitting Resistance ASTM G48 Method A Localized corrosion resistance assessment
Flattening / Flaring ASTM E8 / E290 Ductility and weld quality assessment

Documentation Provided with Every Shipment

  • EN 10204 3.1 Mill Test Certificates (MTC), Factory certificate with manufacturer’s declaration.
  • EN 10204 3.2 available, Third Party Inspection (TPI) by independent agencies on request.
  • NABL-approved laboratory chemical and mechanical test reports.
  • PMI test reports, elemental verification on each pipe.
  • Heat traceability records, raw material to finished product.
  • Hydrostatic and NDT test records.
  • Heat treatment charts (annealing / solution treatment records).
  • Fumigation certificate and Certificate of Origin for international shipments.
  • Commercial Invoice with HS Code 75071200 for customs clearance.

Inconel 625 Pipe and Tube Price in India: April 2026

Inconel 625 pipe price and Inconel 625 tubing price are LME-linked and vary by OD, schedule, condition (Grade 1 or Grade 2), and order quantity. The indicative price table below covers the most commonly ordered product forms. Submit an RFQ for a firm price valid 7 to 14 business days.

Product Form

Size Range

Indicative Price (INR/kg)

Indicative Price (USD/kg)

Seamless Pipe (SCH 40)

1/2″ to 4″ NB

Rs. 3,800 to Rs. 5,000

USD 46 to 60

Seamless Pipe (SCH 80)

1/2″ to 4″ NB

Rs. 4,200 to Rs. 5,800

USD 50 to 70

Welded / ERW Pipe

1″ to 12″ NB

Rs. 3,200 to Rs. 4,500

USD 38 to 54

Heavy Wall Pipe

Custom OD/WT

On request

On request

Instrumentation Tubing

1/16″ to 2″ OD

Rs. 4,500 to Rs. 6,500

USD 54 to 78

Export Destinations and Supply Chain

We are certified Inconel 625 pipes and tubes exporters with ARAMCO approval and HS Code 75071200 documentation. Kalpataru Piping exports to over 40 countries with full export documentation, ISPM-15 compliant fumigated wooden packaging, and seaworthy packing for ocean freight.

Region

Key Countries and Cities

Delivery (Air / Sea)

Middle East

Saudi Arabia (Riyadh, Jubail, Dammam), UAE (Dubai, Abu Dhabi), Qatar, Kuwait, Oman

Air: 3 to 5 days | Sea: 15 to 20 days

Southeast Asia

Singapore, Malaysia, Indonesia, Thailand, Vietnam

Air: 2 to 3 days | Sea: 10 to 15 days

Europe

Germany, UK, France, Italy, Netherlands, Norway, Spain

Air: 5 to 7 days | Sea: 30 to 35 days

North America

USA (Houston, Los Angeles, New York), Canada (Calgary, Toronto), Mexico

Air: 7 to 10 days | Sea: 45 to 55 days

South America

Brazil, Argentina, Chile, Colombia, Venezuela

Air: 10 to 12 days | Sea: 50 to 60 days

Africa

Nigeria, South Africa, Egypt, Algeria, Kenya, Ghana

Air: 5 to 8 days | Sea: 25 to 35 days

East Asia

Japan, South Korea, Taiwan, China

Air: 3 to 5 days | Sea: 12 to 18 days

 
HS Code for Customs Clearance: 75071200 (Nickel tube or pipe fittings). Saudi ARAMCO Approved vendor, regularly supplied to major oil and gas EPC projects in the Gulf region.

Related Inconel 625 Products and Resources

Complete your Inconel 625 piping system with our full range of matching components. All products share the same UNS N06625 alloy and comply with applicable ASTM / ASME standards:

As alloy 625 tube suppliers, we stock common OD and wall combinations ex-Mumbai for urgent orders. Contact our team for Inconel 625 tube supplier enquiries: export@kalpatarupiping.com, firm pricing within 1 business day.

Frequently Asked Questions

What is Inconel 625 used for?

Inconel 625 is employed where high strength, extreme corrosion resistance, and broad temperature range are required. The main uses are aerospace engine exhaust and ducting, subsea and offshore oil and gas piping, processing vessels and heat exchangers, flue gas desulfurization scrubbers, and marine seawater piping. It is resistant to pitting, crevice corrosion, and chloride stress-corrosion cracking and is therefore the standard alloy for chloride-rich and acidic service environments.

What is the difference between Inconel 625 seamless tubing and Inconel 625 welded tubing?

Inconel 625 seamless tubing is made from a solid billet with no weld seam, giving higher strength and better reliability under high pressure, so it is used in aerospace and critical instrumentation. Inconel 625 welded tubing is produced by forming and welding a strip, making it more economical and suitable for heat exchangers and low to medium pressure applications. Both meet ASTM B444 / ASME SB444 standards and are available from our Mumbai stock.

What is the difference between Inconel 625 and Inconel 718?

Inconel 625 is a solid-solution-strengthened alloy. It does not need heat treatment to be strengthened, and it does not need post-weld heat treatment after fabrication. Inconel 718 is a precipitation-hardened alloy with much higher tensile strength (up to 1,276 MPa), but requires solution annealing and aging heat treatment following welding, which adds complexity and cost to fabrication. Alloy 625 is used in corrosion-critical piping and 718 in high-strength mechanical components like gas turbine discs and shafts.

Can Inconel 625 be welded without post-weld heat treatment?

Yes, this is one of the greatest merits of Inconel 625 in comparison to other superalloys. The niobium addition (3.15 to 4.15%) stabilizes the alloy against sensitization during welding. The heat-affected zone of the weld is corrosion-resistant equivalent to the base material without post-weld heat treatment. Use of filler materials ERNiCrMo-3 / ENiCrMo-3 is recommended.

What is the difference between Inconel 625 Grade 1 and Grade 2?

Grade 1 (annealed) is suited for service up to approximately 593 degrees C and offers higher tensile and yield strength at room temperature. Grade 2 (solution annealed) offers slightly lower tensile characteristics at room temperature but with better creep resistance and long-term mechanical integrity at elevated temperatures. It is the correct choice for aerospace, power generation, and high-temperature chemical service.

Do you supply Inconel 625 pipes for Saudi ARAMCO projects?

Yes. Kalpataru Piping is a nickel alloy pipes and tubes vendor approved by Saudi ARAMCO. Our Inconel 625 pipes follow ARAMCO standards and are regularly supplied to large oil and gas projects in Saudi Arabia, UAE, Qatar, and Kuwait. Complete ARAMCO-conformity documents including Mill Test Certificates, PMI reports, and third-party inspection records are provided.

Where can I find Inconel 625 pipe suppliers in India?

Kalpataru Piping Solutions is a Mumbai-based Inconel 625 pipe manufacturer and exporter with ex-stock inventory. We are among India’s leading Inconel 625 pipe suppliers, serving 40+ countries with Saudi ARAMCO-approved material and EN 10204 3.1 MTC. Contact us at export@kalpatarupiping.com or call 022-66337137 for a price within 1 business day.

Get a Quote from India’s Leading Inconel 625 Pipe Suppliers

We stock Inconel 625 pipes in India, ex-warehouse Mumbai, standard sizes dispatched within 2 to 5 business days. Contact us, your Inconel 625 tube supplier in India, for firm pricing within 1 business day.

Email: export@kalpatarupiping.com  |  Phone: 022-66337137  |  kalpatarupiping.com

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