ASTM B444 UNS N06625 Inconel 625 Pipe Guide
ASTM B444 UNS N06625 Inconel 625 Pipe Guide
ASTM B444 UNS N06625 (Inconel 625) pipe is a premium, high-strength nickel-chromium-molybdenum alloy pipe. Renowned for outstanding corrosion resistance and high-temperature stability (up to 982°C), it is widely used in aerospace, marine engineering, and chemical processing.
What is uns N06625 material grade?
Alloy 625 / UNS N06625 is a nickel-chromium-molybdenum alloy with additional of niobium. This provides a high strength alloy without a strengthening heat treatment. The alloy is especially resistant to pitting and crevice corrosion but also other severely corrosive environments.
1. Inconel 625 Pipe Specifications
| Parameter | Details |
|---|---|
| Standard | ASTM B444 / ASME SB444 (Seamless), ASTM B705 / ASME SB705 (Welded) |
| Size Range | 1/8" NPS to 24" NPS (Seamless), up to 26" NPS (Welded) |
| Wall Thickness | 0.5 mm to 20 mm |
| Schedule | SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, XXS |
| End Type | Plain End (PE), Bevelled End (BE), Threaded |
| Surface Finish | Annealed & Pickled, Bright Annealed, Mill Finish |
| Form | Seamless, Welded (ERW, EFW) |
2. Equivalent Material of Inconel 625 Pipes & Tubes
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST | OR |
| Inconel 625 | N06625 | 2.4856 | NC22DNB4M | NiCr22Mo9Nb | NCF 625 | NA 21 | ХН75МБТЮ | ЭИ602 |
3. Chemical Properties Of 625 Inconel Pipes / Tubes
| Grade | C | Mn | Si | S | Al | Ti | Fe | Ni | Cr |
| Inconel 625 | 0.10 max | 0.50 max | 0.50 max | 0.015 max | 0.40 max | 0.40 max | 5.0 max | 58.0 min | 20.0 - 23.0 |
4. Inconel 625 Pipe & Tube Mechanical Properties
| Property | Grade 1 (Annealed) | Grade 2 (Solution Annealed) |
|---|---|---|
| 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 in 2" (min) | 30% | 30% |
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5. ASTM B444 Inconel 625 Pipe Heat Treatment
| Grade | Treatment | Temperature | Time | Cooling | Purpose |
|---|---|---|---|---|---|
| Grade 1 | Solution Annealing | 940 – 1040°C | Per thickness | Rapid cool (water or air) | Softening, maximum corrosion resistance |
| Grade 2 | Stress Relief | 540 – 620°C | Per thickness | Air cool | Reduce residual stresses |
6. Inconel 625 Tubing Sizes
| Wall Thickness | inconel 625 Tube Sizes ( O.D.) |
|---|---|
| .010 | 1/16" , 1/8" , 3/16" |
| .020 | 1/16" , 1/8" , 3/16" , 1/4" , 5/16" , 3/8" |
| .012 | 1/8" |
| .016 | 1/8" , 3/16" |
| .028 | 1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 3/4" , 1" , 1 1/2" , 2" |
| .035 | 1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 7/16" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 2" , 2 1/4" |
| .049 | 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/8" , 1 1/4" , 1 1/2" , 1 5/8" , 2" , 2 1/4" |
| .065 | 1/4" , 5/16" , 3/8" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 3/4" , 2" , 2 1/2" , 3" |
| .083 | 1/4" , 3/8" , 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 7/8" , 2" , 2 1/2" ,3" |
| .095 | 1/2" , 5/8" , 1" , 1 1/4" , 1 1/2" , 2" |
| .109 | 1/2" , 3/4" , 1" , 1 1/4" , 1 1/2" , 2" |
| .120 | 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 2" , 2 1/4" , 2 1/2" , 3" |
| .125 | 3/4" , 1" , 1 1/4" , 1 1/2" , 2" , 3" , 3 1/4" |
| .134 | 1" |
| .250 | 3" |
| .375 | 3 1/2" |
Contact us to customize Inconel 625 products to fit your project dimensions
7. Inconel 625 Tubing Pressure Rating
| Pipe O.D. (in.) |
Wall Thickness of Tube (inches) | |||||||
|---|---|---|---|---|---|---|---|---|
| .028 | .035 | .049 | .065 | .083 | .095 | .109 | .120 | |
| Working Pressure (psig) | ||||||||
| 1/8 | 7900 | 10100 | ||||||
| 1/4 | 3700 | 4800 | 7000 | 9500 | ||||
| 5/16 | 3700 | 5400 | 7300 | |||||
| 3/8 | 3100 | 4400 | 6100 | |||||
| 1/2 | 2300 | 3200 | 4400 | |||||
| 3/4 | 2200 | 3000 | 4000 | 4600 | ||||
| 1 | 2200 | 2900 | 3400 | 3900 | 4300 | |||
| Size mm |
Grade | Maximum internal pressure, ksi | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 100°F | 200°F | 300°F | 400°F | 500°F | 600°F | 700°F | ||||
| 1.59 x 0.36 | N06625 | 19.21 | 19.21 | 19.02 | 18.83 | 18.54 | 18.15 | 17.77 | ||
| 3 x 0.5 | N06625 | 940 | 940 | 930 | 921 | 907 | 888 | 869 | ||
| 6 x1 | N06625 | 940 | 940 | 930 | 921 | 907 | 888 | 869 | ||
| 8x1 | N06625 | 681 | 681 | 675 | 668 | 658 | 644 | 630 | ||
| 8x2 | N06625 | 1476 | 1476 | 1462 | 1447 | 1425 | 1395 | 1366 | ||
| 10x1 | N06625 | 534 | 534 | 529 | 524 | 516 | 505 | 494 | ||
| 12x1 | N06625 | 440 | 440 | 435 | 431 | 424 | 415 | 407 | ||
| 16x1 | N06625 | 324 | 324 | 321 | 318 | 313 | 307 | 300 | ||
8. Weight Chart of Inconel 625 Tubing
| WT | Dimensions | Weight/m | WT | Dimensions | Weight/m |
|---|---|---|---|---|---|
| mm | mm | kg | mm | mm | kg |
| 1.20 | 12.7 x 12.7 | 0.44 | 1.20 | 40 x40 | 1.49 |
| 1.50 | 12.7 x 12.7 | 0.55 | 1.50 | 40 x40 | 1.85 |
| 1.20 | 15 x 15 | 0.53 | 2.00 | 40 x40 | 2.45 |
| 1.50 | 15 x 15 | 0.65 | 3.00 | 40 x40 | 3.75 |
| 1.20 | 20 x 20 | 0.71 | 1.50 | 50 x50 | 2.32 |
| 1.50 | 20 x 20 | 0.88 | 2.00 | 50 x50 | 3.08 |
| 2.00 | 20 x 20 | 1.19 | 3.00 | 50 x50 | 4.65 |
| 2.00 | 25 x 25 | 1.49 | 3.00 | 70 x70 | 6.53 |
| 1.20 | 25 x 25 | 0.92 | 2.00 | 60 x60 | 3.71 |
| 3.00 | 25 x 25 | 2.20 | 2.00 | 80 x80 | 4.98 |
| 1.50 | 25 x 25 | 1.14 | 3.00 | 60 x60 | 5.49 |
| 1.20 | 30 x 30 | 1.10 | 3.00 | 80 x80 | 7.53 |
| 1.50 | 30 x 30 | 1.37 | 2.00 | 100 x 100 | 6.40 |
| 2.00 | 30 x 30 | 1.84 | 3.00 | 100 x 100 | 9.53 |
| 3.00 | 30 x 30 | 2.72 | - | - | - |
9. Inconel 625 Tube Price
As a leading supplier and stocker of Inconel 625 pipe, Gnee Alloy offers seamless steel pipe in a wide range of sizes, wall thicknesses, and specifications at highly competitive prices. The price of Inconel 625 (UNS N06625) pipe depends on its outer diameter (OD), wall thickness (WT), length, and manufacturing process. The following price overview is designed to help buyers estimate project requirements.
| Inconel 625 Pipes - FOB Price | |
|---|---|
| Product | Price |
| Inconel 625 seamless pipes | US $2300-4000 / Ton |
| Seamless pipe ASTM B444 Alloy 625 | US $615-1000 / Ton |
| Inconel 625 seamless pipe | US $400-2000 / Ton |
| Inconel ASTM B444 625 welded pipe | US $830-2000 / Metric Ton |
| SB444 625 seamless pipe | US $1.5-9 / Kilogram |
| 625 seamless pipe manufacturer | US $830-2000 / Metric Ton |
| Inconel 625 Tubes - FOB Price | |
| Inconel 625 seamless inconel Tube | US $10-168 / Piece |
| Inconel seamless Tube ASTM B163 Alloy | US $15-100 / Kilogram |
| Inconel seamless Tube 625 | US $20-45 / Kilogram |
| SA163 Alloy 625 seamless Tube | US $2000-4600 / Ton |
| Inconel 625 alloy seamless Tube manufacturer | US $25-70 / Kilogram |
For most updated Inconel 625 Tube Price Contact Us
10. ASTM B444 Inconel 625 Non-destructive testing (NDT) for pipes
| Test Method | Requirement | Standard | Acceptance Criteria |
|---|---|---|---|
| Eddy Current Testing (ET) | As specified (typically 100%) | ASTM E426 | No relevant indications |
| Ultrasonic Testing (UT) | As specified | ASTM E213 | No defects exceeding 5% wall |
| Hydrostatic Test | 100% | ASTM B444 | No leakage |
| Pneumatic Test | As specified | - | No leakage |
| Visual Inspection | 100% | ASTM B829 | No surface defects |
11. ASTM B444 Inconel 625 Non-destructive testing (NDT) for pipes
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
Gnee Alloy inconel 625 Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Alloy 625 Alloy Product Packing
Contact us for the latest export price quote for 625 Alloy
FAQ
Q：What are Inconel 625 tubes used for?
A：Inconel 625 tubes are used in aerospace, marine, chemical processing, and nuclear industries. Their excellent resistance to heat, corrosion, and high-pressure environments makes them ideal for heat exchangers, exhaust ducts, reactor piping, and offshore components.
Q：What is the temperature range for Inconel 625 tubing?
A：Inconel 625 tubing performs reliably across a wide temperature range, from cryogenic levels up to around 982°C (1800°F). Its ability to retain strength and resist oxidation at extreme temperatures makes it ideal for thermal and high-stress applications.
Q：Are Inconel 625 tubes resistant to seawater corrosion?
A：Yes, Inconel 625 tubes offer outstanding resistance to seawater corrosion, including pitting and crevice corrosion. Their high nickel and molybdenum content makes them suitable for marine applications like seawater piping, risers, and offshore structures.
Q：What standards and specifications apply to Inconel 625 tubes?
A：Inconel 625 tubes are manufactured to ASTM B163, B444, B516, and ASME SB standards. These cover seamless and welded tubing used in heat exchangers, boilers, and condensers requiring high strength, corrosion resistance, and thermal stability.
Q：What is the difference between Inconel 625 seamless tubing and welded tubing?
A：Seamless Inconel 625 tubing offers superior strength and uniformity, ideal for high-pressure uses. Welded tubing is more economical and suited for lower-stress applications but must be inspected for weld quality to ensure performance under critical conditions.
