Incoloy Alloy 925 ®

Incoloy Alloy 925 is a nickel-iron-chromium alloy which is age hardenable, with elements of titanium, molybdenum, copper and aluminium. Alloy 925 offers excellent resistance to corrosion and shows high strength. Incoloy Alloy 925 offers good resistance to stress corrosion cracking, crevice corrosion and numerous aqueous environments including those containing chlorides and sulphides.

West Special Fasteners are manufacturers of Incoloy Alloy 925 Fasteners.

Alloy 925 Fasteners such as Socket Setscrews, Socket Countersunk Screws, Nuts, Washers, Bolts, Socket Capscrews, Studs, Studbolts, hot forged items and machined components to drawings can all be produced at West Special Fasteners Limited.

We can also supply round bar in Alloy 925

Incoloy Alloy 925 is used in a variety of different applications where high strength and corrosion resistance in sour gas environments is important. This would include use in the oil & gas industry for parts in intermediate sour-gas wells, marine and pump shafting and high-strength piping systems and power plants condensation and pipe system in the use of sewage water to cool water.

West Special Fasteners specialises in exotic metals and have supplied major UK companies with Incoloy Alloy 925 Nuts, Bolts etc.

We look forward to helping with your Alloy 925 requirements and would welcome any enquiries by telephone on + 44 (0)1246 291111 or email

Typical Chemical Analysis

C Si Mn P S Cr Ni Mo
0.030 0.500 1.000 0.030 0.030 19.5-22.5 42.0-46.0 2.5-3.5
W N2 Nb Ti Co Cu Al B
0.500 1.9-2.40 1.5-3.0 0.1-0.5
V Fe Mg Ta Nb + Ta Ca O2 Bi
22.0 min
Se Sn Zn Pb

Typical Mechanical Properties

Tensile Strength: 965N/mm² Min Impacts:
0.2% Proof Stress: 724N/mm² Min
Elongation: 18% Stress Rupture:
Reduction of Area: 25%
Hardness: 38 HRC Max
Other Remarks: Mechanicals based on material in Cold Worked, Solution Annealed and Aged Condition 0.625”-3” inclusive