Incoloy 925 (UNS N09925) is a precipitation-hardenable nickel-iron-chromium alloy with additions of molybdenum and copper. It combines the high strength of a precipitaiton-hardenable alloy with the excellent corrosion resistance of Incoloy alloy 825.
Incoloy 925 Features
Protection in oxidizing and reducing atmosphere
Resistance to chloride ion stress-corrosion cracking
Excellent resistance to pitting and crevice corrosion
Incoloy 925 Applications
Valves, hangers, packers, and tubulars for sour gas production
Marine fasteners and pump shafts
Incoloy 925 Specifications
| Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr | NF | BS |
| Incoloy 925 | – | – | Incoloy 925 | N09925 | – | – | – | – |
Chemical Compositions of incoloy 925 Nickel Alloy:
| Alloy | C | Si | Mn | P | S | Cr | Ni | Mo | AI | Ti | Cu | Fe |
| Incoloy 925 | ≤0.03 | ≤0.50 | ≤1.00 | ≤0.03 | ≤0.03 | 19.5-22.5 | 42.0-46.0 | 2.5-3.5 | 0.1-0.5 | 1.9-2.4 | 1.5-3.0 | Bal |
Typical Physical and Mechanical Properties (RT, Solution annealed)
| Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HB |
| 8.08 | 1311-1366 | 1210 | 810 | 24 | – |
Incoloy 925 Product Forms and Standards
| Rod, Bar, Wire and Forgings | ASTM B408/ASME SB408, ASTM B564/ASME SB564, ISO 9723/9724/9725 |
| Plate, Sheet and Strip | ASTM A240/A480/B409/B906/ASME SA240/SA480/SB409/SB906, ISO 6208 |
| Pipe and Tube | ASTM B163/ASME SB163, ASTM B407/B829/ASME SB407/SB829, ASTM B514/B775/ASME SB514/SB775, ASTM B515/B751/ASME SB515/SB751, ISO 6207 |
| Welding Product | - |
| Others | ASTM B366/ASME SB366(Fittings) |