AlloyAlloy 625 Inconel 625 (N06625)
FamilyNickel Alloys
Supplied toASTM B444, ASTM B704, ASME SB-444
Typical serviceSeawater, Sour gas, Aerospace
Size range1/4" to 2-1/2" OD, .028" to .165" wall
TempersAnnealed (Grade 1) or solution annealed (Grade 2) per B444
Testing100% eddy current or ultrasonic per B444/B704, hydrostatic, flattening, flaring; PMI and G28 corrosion test on request
OriginDomestic and approved mills, inspected and certified in Hillsboro
Sourced alloy, certified in HillsboroAmeritube does not manufacture Alloy 625 in Texas. It is supplied from qualified domestic and international mills, then received, inspected, tested, and released under our ISO 9001:2015 system in Hillsboro, Texas, with a full mill test report.
What Alloy 625 is
Alloy 625 is a nickel-chromium-molybdenum-columbium alloy strengthened by solid solution, so it delivers high strength without heat treatment and holds it from cryogenic temperatures to about 1800 degrees F. The chromium and molybdenum give it pitting and crevice corrosion resistance comparable to C-276 in many environments, and it is immune to chloride stress corrosion cracking.
Standards we supply to
- ASTM B444 / ASME SB-444, seamless pipe and tube
- ASTM B704 / ASME SB-704, welded tube
- ASTM B705 welded pipe and AMS 5581 on request
Chemical composition
| Element | Requirement |
|---|---|
| Nickel | 58.0% min |
| Chromium | 20.0 to 23.0% |
| Molybdenum | 8.0 to 10.0% |
| Columbium + Tantalum | 3.15 to 4.15% |
| Iron | 5.0% max |
| Carbon | 0.10% max |
Typical mechanical properties, Grade 1 annealed
| Property | Value |
|---|---|
| Tensile strength | 120,000 psi min (827 MPa) |
| Yield strength | 60,000 psi min (414 MPa) |
| Elongation in 2" | 30% min |
Where it is used
- Seawater heat exchangers, piping, and subsea components.
- Sour gas production tubing, wellheads, and downhole tools.
- Flue gas desulfurization and waste incineration.
- Aerospace ducting, bellows, and exhaust systems.
- Chemical process exchangers where strength and corrosion resistance both matter.
- Nuclear and thermal power reactor components.
What to put in your Alloy 625 RFQ
Grade 1 (annealed, for corrosion service) or Grade 2 (solution annealed, for high temperature), seamless or welded, OD, wall, length, quantity, and any NACE MR0175, ASME, or aerospace specification.