ASTM B444 Alloy 625 Seamless Pipe Manufacturer & Supplier in USA
Inconel 625 Pipes & Tubes are premium Nickel-Chromium-Molybdenum-Niobium alloy products that deliver outstanding corrosion resistance across a wide range of aggressive media. Unlike Inconel 600, the addition of molybdenum (8-10%) and niobium + tantalum (3.15-4.15%) in Alloy 625 provides exceptional resistance to pitting, crevice corrosion, and intergranular attack, making Inconel 625 pipe the first choice for seawater service, offshore structures, and chemically aggressive environments where other alloys fail.
Alloy 625 pipe (UNS N06625 / W.Nr. 2.4856) is solution-strengthened, meaning it does not require heat treatment to develop full mechanical properties, making Inconel 625 seamless pipe and tube products easier to fabricate and weld in the field. Alloy 625 seamless pipe retains important mechanical properties up to 815C, while its cryogenic toughness makes it equally suitable for LNG and deep-sea applications. In many systems it is used alongside Inconel 600 pipes, Inconel 601 pipes, and Inconel 718 pipes to meet varying temperature and strength requirements.
USA Piping Solution is a certified Inconel 625 pipe manufacturer and global exporter supplying ASTM B444 / ASME SB444 Inconel 625 seamless pipe, ASTM B705 / ASME SB705 welded pipe, and Inconel 625 seamless tubing in a comprehensive range of sizes, schedules, and end configurations. All products come with full material traceability and MTCs to ASTM, ASME, and NACE MR0175 standards. USA Piping Solution is an ISO 9001:2015 certified supplier and approved vendor to major EPC contractors and end-users in the oil & gas, power, and chemical processing sectors, with over 40 years of experience exporting nickel alloy pipe products globally. Contact us for the latest Inconel 625 pipe price and availability.
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Types of Inconel 625 Pipes & Tubes
Inconel 625 pipe and alloy 625 tube products are manufactured in multiple forms to match pressure ratings, dimensional requirements, and application environments:
Inconel 625 Seamless Pipe
Hot-extruded or cold-drawn from solid billet with no longitudinal weld - ASTM B444 / ASME SB444. Preferred for high-pressure offshore, subsea, and chemical process applications requiring uniform wall thickness and maximum mechanical integrity.
Inconel 625 Welded Pipe
Produced from flat-rolled strip and welded to ASTM B705 / ASME SB705. Cost-effective for large-diameter structural and process piping where extreme pressure conditions are not the primary design driver.
Inconel 625 Seamless Tubing
Precision Inconel 625 seamless tubing manufactured to ASTM B444 / AMS 5581 for heat exchanger, instrumentation, and hydraulic control line applications. Available cold-drawn for tight OD tolerances and superior surface finish.
Alloy 625 Welded Tube
Welded alloy 625 tube to ASTM B705 / ASME SB705 for condenser, heat exchanger shell, and low-pressure fluid transfer applications requiring accurate dimensional control at competitive cost.
Advantages of Inconel 625 Pipes & Tubes
- Exceptional resistance to pitting and crevice corrosion in seawater and chloride media.
- Outstanding stress corrosion cracking resistance, superior to Inconel 600 in chloride environments.
- High strength without heat treatment (solution-strengthened by Nb and Mo additions).
- Excellent fatigue and corrosion-fatigue strength, ideal for dynamic subsea applications.
- Good mechanical properties retained from cryogenic temperatures to 815C.
- Superior weldability using matching ERNiCrMo-3 filler metal; no post-weld heat treatment required.
- Resistance to a wide range of inorganic and organic acids, including phosphoric, sulfuric, and hydrofluoric acids.
- NACE MR0175 / ISO 15156 compliant for sour (H2S) service.
Inconel 625 Pipe Price & Tubing Price:
For bulk orders or export inquiries, contact our sales team for the latest Inconel 625 pipe price and Inconel 625 tubing price. Stock available for fast global delivery.
Check Today's price in USAInconel 625 Pipes & Tubes Specifications
| Feature | Specification Details |
|---|---|
| Applicable Standards | ASTM, ASME, AMS, API, NACE |
| Seamless Pipe & Tube | ASTM B444 / ASME SB444 |
| Welded Pipe & Tube | ASTM B705 / ASME SB705 |
| Cold-Drawn Seamless Tube (AMS) | AMS 5581 |
| Pipe Size Range | 1/8" NB to 24" NB (6.35 mm to 610 mm OD) |
| Pipe Schedules | SCH 5S, 10S, 10, 20, 40S, 40, STD, 60, 80S, 80, XS, 100, 120, 140, 160 & XXS |
| Seamless Tube OD Range | 6.00 mm to 168.3 mm OD |
| Tube Wall Thickness | 0.5 mm to 20 mm |
| Manufacturing Types | Seamless, Welded (EFW/SAW), ERW, Fabricated |
| Length Options | Single Random (5-7 m), Double Random (7-14 m), Cut Length, Required Length |
| End Connections | Plain End (PE), Beveled End (BE), Threaded & Coupled (T&C) |
| UNS Designation | N06625 |
| W.Nr. / DIN | 2.4856 |
Chemical Composition of Inconel 625 Pipes & Tubes
| Grade | Ni | Cr | Mo | Nb (+Ta) | Fe (max) | Co (max) | Al (max) | Ti (max) | C (max) | Mn (max) | Si (max) | S (max) | P (max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy 625 / N06625 | 58.00 min | 20.0-23.0 | 8.0-10.0 | 3.15-4.15 | 5.00 | 1.00 | 0.40 | 0.40 | 0.10 | 0.50 | 0.50 | 0.015 | 0.015 |
Mechanical Properties of Inconel 625 Pipes & Tubes
| Property | Annealed - Grade 1 | Solution Annealed - Grade 2 |
|---|---|---|
| Tensile Strength (min) | 120 ksi / 827 MPa | 100 ksi / 690 MPa |
| Yield Strength 0.2% Offset (min) | 60 ksi / 414 MPa | 40 ksi / 276 MPa |
| Elongation at Break (min) | 30% | 30% |
| Hardness (max) | Rb 100 / Rc 22 | Rb 100 / Rc 22 |
| Density | 8.44 g/cm3 (0.305 lb/in3) | 8.44 g/cm3 (0.305 lb/in3) |
| Melting Range | 1290-1350C (2350-2460F) | 1290-1350C (2350-2460F) |
Grade 1 = Cold-worked and annealed (ASTM B444). Grade 2 = Hot-finished and solution annealed (ASTM B444).
Equivalent Grades for Inconel 625 Pipes & Tubes
| Grade | UNS | W.Nr. / DIN | JIS | BS | AMS | AWS | EN |
|---|---|---|---|---|---|---|---|
| Alloy 625 | N06625 | 2.4856 | NCF 625 | NA 21 | AMS 5581 / AMS 5599 | ERNiCrMo-3 | NiCr22Mo9Nb |
Inconel 625 Pipe Weight Chart (kg/m)
Approximate weights based on nominal bore and schedule. Actual weight may vary slightly with mill tolerances.
| NB (inch) | OD (mm) | SCH 10S (kg/m) | SCH 40 (kg/m) | SCH 80 (kg/m) | SCH 160 (kg/m) | XXS (kg/m) |
|---|---|---|---|---|---|---|
| 1/4" | 13.72 | 0.38 | 0.63 | 0.84 | - | - |
| 3/8" | 17.15 | 0.50 | 0.84 | 1.10 | - | - |
| 1/2" | 21.34 | 0.67 | 1.27 | 1.62 | 2.55 | 2.55 |
| 3/4" | 26.67 | 0.92 | 1.69 | 2.20 | 3.24 | 3.24 |
| 1" | 33.40 | 1.28 | 2.50 | 3.24 | 4.55 | 4.55 |
| 1 1/4" | 42.16 | 1.72 | 3.39 | 4.47 | 6.35 | 6.35 |
| 1 1/2" | 48.26 | 2.05 | 4.05 | 5.41 | 7.67 | 7.67 |
| 2" | 60.33 | 2.72 | 5.44 | 7.48 | 11.10 | 11.10 |
| 2 1/2" | 73.03 | 3.68 | 7.66 | 10.41 | 15.27 | 15.27 |
| 3" | 88.90 | 4.87 | 10.25 | 13.44 | 19.63 | 22.37 |
| 4" | 114.30 | 6.72 | 13.57 | 18.64 | 27.67 | 31.57 |
| 6" | 168.28 | 10.97 | 21.77 | 30.19 | 47.10 | 53.63 |
| 8" | 219.08 | 15.27 | 42.55 | 59.02 | 79.10 | 90.44 |
Weights calculated using Inconel 625 density of 8.44 g/cm3. For non-standard schedules or custom wall thicknesses, contact our team.
Inconel 625 Tube Size Chart
Standard Inconel 625 seamless tubing dimensions available from stock and to order:
| OD (mm) | Available Wall Thickness (mm) |
|---|---|
| 6.00 | 0.5, 0.7, 1.0, 1.5 |
| 8.00 | 0.5, 0.7, 1.0, 1.5, 2.0 |
| 10.00 | 0.7, 1.0, 1.5, 2.0 |
| 12.00 | 1.0, 1.5, 2.0, 2.5 |
| 14.00 | 1.0, 1.5, 2.0, 2.5 |
| 16.00 | 1.0, 1.5, 2.0, 2.5, 3.0 |
| 19.05 (3/4") | 1.0, 1.2, 1.5, 2.0, 2.5, 3.0 |
| 25.40 (1") | 1.2, 1.5, 2.0, 2.5, 3.0, 3.5 |
| 31.75 (1 1/4") | 1.5, 2.0, 2.5, 3.0, 3.5 |
| 38.10 (1 1/2") | 1.5, 2.0, 2.5, 3.0, 4.0 |
| 50.80 (2") | 2.0, 2.5, 3.0, 4.0, 5.0 |
| 63.50 (2 1/2") | 2.0, 2.5, 3.0, 4.0, 5.0, 6.0 |
| 76.20 (3") | 2.5, 3.0, 4.0, 5.0, 6.0 |
| 101.60 (4") | 3.0, 4.0, 5.0, 6.0, 8.0 |
| 168.28 (6") | 4.0, 5.0, 6.0, 8.0, 10.0 |
Custom OD and wall thickness combinations available on request. Contact us for Inconel 625 tubing price on specific sizes.
Inconel 625 Pipe & Tube Pressure Rating
Pipe Pressure Ratings - Working Pressure (psig) at Room Temperature
| NB (inch) | SCH 10S | SCH 40 | SCH 80 | SCH 160 | XXS |
|---|---|---|---|---|---|
| 1/2" | 2,400 | 5,700 | 7,800 | 12,600 | 12,600 |
| 3/4" | 2,100 | 4,700 | 6,300 | 9,800 | 9,800 |
| 1" | 1,900 | 4,100 | 5,400 | 7,900 | 7,900 |
| 1 1/2" | 1,500 | 3,100 | 4,200 | 6,200 | 6,200 |
| 2" | 1,300 | 2,600 | 3,700 | 5,600 | 5,600 |
| 3" | 1,000 | 2,200 | 3,000 | 4,500 | 5,200 |
| 4" | 900 | 1,900 | 2,700 | 4,000 | 4,600 |
| 6" | 700 | 1,600 | 2,200 | 3,400 | 3,900 |
Tube Pressure Ratings - Maximum Internal Pressure (ksi)
| OD (inch) | Wall 0.049" | Wall 0.065" | Wall 0.083" | Wall 0.109" | Wall 0.120" | Wall 0.134" |
|---|---|---|---|---|---|---|
| 3/8" | 7.5 | 10.3 | 13.5 | 18.5 | - | - |
| 1/2" | 5.5 | 7.4 | 9.7 | 13.2 | 14.7 | 16.8 |
| 5/8" | 4.3 | 5.8 | 7.6 | 10.4 | 11.6 | 13.2 |
| 3/4" | 3.6 | 4.8 | 6.3 | 8.6 | 9.6 | 11.0 |
| 1" | 2.7 | 3.6 | 4.7 | 6.5 | 7.2 | 8.2 |
| 1 1/4" | - | 2.9 | 3.8 | 5.2 | 5.8 | 6.6 |
Tube pressure ratings use imperial wall thicknesses per instrumentation tubing conventions. Values are based on allowable stress data per ASME B31.3. Contact us for elevated-temperature pressure ratings.
Applications of Inconel 625 Pipes & Tubes
The superior properties of Inconel 625 pipes & tubes make them a preferred choice in demanding industries worldwide. The combination of high strength, excellent weldability, and unmatched corrosion resistance in chloride-rich environments makes alloy 625 pipe and alloy 625 tube indispensable in the following sectors:
- Aerospace & Defense: Ducting systems, engine exhaust systems, thrust reversers, and fuel nozzles, exploiting high strength-to-weight ratio and oxidation resistance.
- Offshore & Marine Engineering: Subsea umbilicals, flexible risers, propeller shafts, wire rope, seawater handling systems, leveraging outstanding pitting and crevice corrosion resistance in seawater.
- Chemical & Petrochemical Processing: Reactor vessels, heat exchangers, distillation columns, and pipelines handling HCl, H2SO4, H3PO4, and other aggressive acids.
- Oil & Gas - Sour Service: Downhole tubing, Christmas tree components, and wellhead equipment in H2S-containing environments (NACE MR0175 qualified).
- Nuclear Power Generation: Reactor core components, control rod mechanisms, and spent fuel handling equipment, excellent radiation resistance and stress corrosion cracking resistance.
- Flue Gas Desulphurization (FGD): Stack liners, dampers, and absorber vessels in wet scrubber systems handling SO2-rich corrosive condensates.
Inconel 625 Pipe and Tube Price
The Inconel 625 pipe price is influenced by several factors including current nickel and molybdenum market rates, pipe OD, wall thickness, schedule, manufacturing method, certification requirements, and order quantity. Contact us for exact current pricing:
| Product | Standard | Indicative Price Range (USD) | Unit |
|---|---|---|---|
| Inconel 625 Seamless Pipe (small bore, SCH 40) | ASTM B444 | $50-$120 | Per kg |
| Inconel 625 Seamless Pipe (large bore, SCH 40) | ASTM B444 | $45-$100 | Per kg |
| Inconel 625 Welded Pipe (SCH 10S-SCH 40) | ASTM B705 | $35-$80 | Per kg |
| Inconel 625 Seamless Tubing (small OD, precision) | ASTM B444 / AMS 5581 | $80-$180 | Per kg |
| Inconel 625 Seamless Tubing (heat exchanger) | ASTM B444 | $55-$130 | Per kg |
| Alloy 625 Welded Tube | ASTM B705 | $40-$90 | Per kg |
Prices are indicative and subject to change based on current nickel and molybdenum commodity rates, order quantity, dimensional specification, and delivery destination. Contact USA Piping Solution for an exact quotation.
Ready to source Inconel 625 pipes and tubes for your project? Contact USA Piping Solution for a precise quote tailored to your specifications. We supply to EPCs, OEMs, and fabricators worldwide.
Request a Quote →Packing, Documentation & Export
Inconel 625 pipes and tubes are packed in wooden crates or polyethylene-sleeved bundles, end-capped and labelled with heat number, grade, standard, and dimensions to prevent transit damage and ensure full traceability. Every order ships with EN 10204 Type 3.1 Material Test Certificates covering chemical composition and mechanical properties. On request, we provide EN 10204 Type 3.2 certificates (third-party witnessed), NACE MR0175 compliance documentation for sour service projects, PMI (Positive Material Identification) reports, and hydrostatic test certificates. Export documentation including Certificate of Origin, Phytosanitary Certificate, and fumigation certificates is arranged for all international shipments.
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FAQs - Inconel 625 Pipes & Tubes
What is the difference between Inconel 625 Grade 1 and Grade 2?
Under ASTM B444, Grade 1 refers to cold-worked and annealed Inconel 625 pipe with a minimum tensile strength of 120 ksi (827 MPa) and yield strength of 60 ksi (414 MPa). Grade 2 refers to hot-finished and solution-annealed pipe with a minimum tensile strength of 100 ksi (690 MPa) and yield strength of 40 ksi (276 MPa). Both grades carry the same minimum elongation of 30% and hardness limit of Rb 100 / Rc 22.
What standard covers Inconel 625 seamless pipe?
Inconel 625 seamless pipe is covered by ASTM B444 and its ASME equivalent ASME SB444. Welded pipe and tube are covered by ASTM B705 / ASME SB705. Cold-drawn seamless tubing for aerospace and instrumentation applications is also produced to AMS 5581.
What is the maximum temperature for Inconel 625 pipe?
Inconel 625 pipe retains useful mechanical properties up to approximately 815C (1500F) in oxidising and reducing environments. Above this temperature, creep and oxidation resistance decrease significantly. For cryogenic applications, Inconel 625 maintains excellent toughness down to liquid nitrogen temperatures, making it suitable for LNG and deep-sea service.
Is Inconel 625 pipe NACE MR0175 compliant?
Yes. Inconel 625 (UNS N06625) is listed in NACE MR0175 / ISO 15156 as a qualified material for use in H2S-containing (sour service) environments in oil and gas production. USA Piping Solution can supply Inconel 625 pipe and tube with NACE MR0175 compliance documentation on request.
What is the current price of Inconel 625 pipe per kg?
Inconel 625 pipe prices typically range from USD 35 to USD 120 per kg depending on OD, wall thickness, schedule, manufacturing method (seamless vs welded), certification requirements, and current nickel and molybdenum market rates. Contact USA Piping Solution for an exact quotation based on your specific size and quantity requirements.
What is the difference between Inconel 625 pipe and Inconel 600 pipe?
Inconel 625 (UNS N06625) contains molybdenum (8-10%) and niobium+tantalum (3.15-4.15%) in addition to nickel and chromium, giving it superior pitting resistance, crevice corrosion resistance, and stress corrosion cracking resistance, especially in chloride and seawater environments. Inconel 600 (UNS N06600) has a simpler Ni-Cr-Fe composition optimised for high-temperature oxidation resistance and is preferred for furnace muffles, nuclear steam generators, and carburising atmospheres. Inconel 625 is generally the stronger and more corrosion-resistant alloy; Inconel 600 is typically more economical for high-temperature non-chloride service.