Luois Metals supplies Incoloy 925 forgings—a highly developed nickel-iron-chromium-copper-molybdenum alloy—from our inventory in Houston, designed for demanding chemical, marine, and pollution control applications. Forged in accordance with ASTM B408 and AMS 5912 standards, our forgings of high integrity are offered in sizes of customer choice and tempers. With higher resistance to pitting, crevice corrosion, and chloride stress corrosion, Incoloy 925 is relied upon in seawater environments, in flue gas desulfurization systems, and in oil refinery applications. Luois Metals provides secure supply, technical expertise, and fast delivery for mission-critical alloy components.
Incoloy 925 composition consists of Ni ~40–44%, Fe ~29–34%, Cr ~19–23%, Cu 1.5%, Mo 2.5–3.5%, and Ti/Nb additions. It provides tensile strength ~620 MPa, yield strength ~230 MPa, and elongation of ~50%. Hardness in annealed condition is approximately 200 HB. The alloy has superior resistance to chloride stress corrosion cracking, pitting, crevice corrosion, and sulfuric acid. The alloy maintains mechanical strength at 350 °C and complies with ASTM B408 and AMS 5912 specifications for critical-service forgings.
Specifications ASTM B637 / ASME SB637
Flat bar blocks up to 27″ width and 15,000 lbs.
Cylinders and sleeves up to 50″ maximum O.D. and 65″ maximum length
Discs and hubs up to 50″ diameter and 20,000 lbs.
Rolled, hand forged or mandrel forged rings up to 84″ maximum O.D. and 40″ maximum length
Rounds, shafts and step shafts up to 144″ maximum length and 20,000 lbs.
| Grade | Ni% | Cr% | Fe% | Mo% | Cu% | Ti% | Al% | Mn% | Si% | Nb% | C% | S% |
| Incoloy 925 | 42.0-46.0 | 19.5-22.5 | Min 22 | 2.5-3.5 | 1.5-3.0 | 1.9-2.4 | 0.1-0.5 | Max 1.0 | Max 0.5 | Max 0.5 | Max 0.03 | Max 0.03 |
| UNS | Heat Treatment | Tensile Strength, min, psi (MPa) | Yield Strength (0.2 % offset), min, psi (MPa) | Elongation in 2 in. (50 mm) or 4D, min, % | Reduction of Area, min, % | Brinell or (Rockwell C) Hardness |
| ASTM B637 UNS N09925 | solution + precipitation harden | 140 000 (965) | 105 000 (724) / 110 000 (758) | 18 | 25 | 346 max (38, Rc max) |
| STANDARD | UNS | WNR. |
| Alloy 925 | N09925 | – |
The ideal temperature range for forging Incoloy 925 is between 1,800°F (982°C) and 2,200°F (1,204°C). Forging should be done within this range to achieve optimal material properties and avoid overheating.
Incoloy 925 forgings require minimal maintenance due to their excellent corrosion resistance. Regular inspection for signs of wear, cracks, or environmental damage is recommended to ensure long-term performance.
Incoloy 925 forgings have limited high-temperature strength beyond 1,600°F (871°C) and may suffer from reduced ductility in extreme conditions. They also exhibit moderate resistance to pitting and crevice corrosion in highly aggressive environments.
Incoloy 925 forgings are utilized in chemical process equipment, heat exchanger tubes, pollution control scrubbers, and seawater valves. In oil & gas, they‘re utilized for pump shafts, rotating equipment, and wet-stack components. In sea coast chemical plants, they‘re used in pickling and brine systems. Flue gas desulfurization units take advantage of their corrosion resistance. The alloy is chosen for marine fasteners, condensers, and marine aerospace hardware. Where resistance to chloride and corrosive conditions and structural integrity are of top priority in high-moisture conditions, Incoloy 925 forgings maintain long-term dependability.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
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