Alloy 286/660 A/B/C/D

Alloy 286/660 A/B/C/D is a non-magnetic alloy which offers very high corrosion resistance, along with well retained high strength up to approximately 700˚C. Alloy 286 also shows good oxidation resistance up to approximately 800˚C. Alloy 286/660 can be age hardened to an elevated strength level.

West Special Fasteners are manufacturers of Incoloy Alloy 286/660 Fasteners.

Alloy 286/660 Fasteners such as Socket Capscrews, Nuts, Studs, Bolts, Washers, Studbolts, Socket Countersunk Screws, Socket Setscrews, 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 286/660.

Alloy 286/660 A/B/C/D is used in a number of applications where high temperature and corrosion resistance is important. Alloy 286/660 has been used in applications such as high performance components in jet engines, turbines and after burner parts because of its first-class resistance in environments of elevated heat.

West Special Fasteners specialises in exotic metals and have supplied major UK companies with Alloy 286/660 A/B/C/D nuts, bolts etc.

We look forward to helping with your Alloy 286/660 A/b/C/D 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
0.080 1.000 2.000 0.040 0.030 13.5-16. 24.0-27. 1.00-1.50
W N2 Nb Ti Co Cu Al B
1.90-2.3 0.35 0.001-0.010
V Fe Mg Ta Nb + Ta Ca O2 Bi
Se Sn Zn Pb

Typical Mechanical Properties

Tensile Strength: 895N/mm² Min Impacts:
0.2% Proof Stress: 585N/mm² Min*
Elongation: 15% Stress Rupture: 650°C, Stress Min 385 Mpa for 100 Hrs Min

5% Min Elongation***
Reduction of Area: 18%
Hardness: 24-37 HRC**
Other Remarks: * Min 0.2% For 660D is 725Mpa

** Hardness Range For 660D is 24-35 HRC

*** Stress Rupture Not Required For 660D