Chung Metal provides Incoloy 925 Forgings, a nickel-base alloy with cobalt and molybdenum additions for combined high strength, corrosion resistance, and chlorides as well as reducing acid resistance. Incoloy 925 is beneficial in applications where mechanical load and severe chemical exposure coexist. Forgings in Incoloy 925 are produced with controlled chemistry and heat treatment for consistent performance in marine, oil & gas, and chemical processing applications.
Incoloy 925 is normally composed of ~40‑45% nickel, ~20‑25% chromium, minor cobalt (~8‑12%), molybdenum (~4‑6%), along with iron and minute amounts of copper and other stabilizers. Mechanical properties are tensile strength of 700‑900 MPa depending on temper, yield strength lower, elongation moderate (~20‑35%). Distinguished resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. Excellent weldability and high toughness.
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 offshore platform hardware, seawater valves and piping, chemical process plant equipment, desalination equipment, and oil & gas equipment that is exposed to chloride environments. Also utilized in heat exchangers, pump shafts, impellers, and structural components where extreme mechanical stresses and severe chemical or saline exposure are experienced. Ideal for components in marine, chemical, and petrochemical service.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chung Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Da Nang, Vietnam
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