Alloy 286 / 660
A high temperature steel bolting grade, used for fasteners and component parts within the marine, power and aerospace industry.
- ASTM A453 GR 660 (High Temperature Bolting) UNS S66286Tested and heat treated to conform to grades A, B and D
Fully certified material, additional testing available
UK, US and European origin unless otherwise stated
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Broder Metals Group supply air melt material to ASTM A453 GR 660 (High Temperature Bolting) and UNS S66286.
Our product conforms to the Alloy 660 grade D specification (with a guaranteed yield strength minimum of 105,000 PSI), but with stress rupture tests carried out to also conform to 660 grade A. These provide a tensile strength of 895 MPa (minimum), 0.2% offset yield strength of 725 MPa (minimum), elongation of 15% and reduction of area of 18%. Hardness is in the range 29-35 HRC.
Although best known for the above grades we also supply ASTM A453 GR 660 heat treated and tested to conform to grade B. This provides a tensile strength of 895 MPa (minimum), a lower 0.2 offset yield strength of 585 MPa (minimum), elongation of 15% and reduction of area of 18%. Hardness is in the range 24-37 HRC. Stress rupture tests are performed on the material as standard.
Alloy 286 Chemical Composition
Alloy 286 Mechanical Properties
|Grade 286/ 660 Class||Hardening Treatment|
|Temp ° F||Temp ° C||Hold for||Cooling Method|
|A and D*||1325 +/-25||720 +/-14||16 hours||Air Cool|
|B||1325 +/-25||720 +/-14||16 hours||Air Cool|
For more technical information download our Alloy 286 information sheet here
Alloy 286 is used in offshore and marine applications, and the aerospace industry for:
- Critical frames
- Components for gas turbines
- Aircraft components
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