ASTM A453 Grade 660 Chemical Composition

High Temperature Stainless Steel Alloy A286

ASTM A453 Grade 660 Chemical Composition

Find typical requirement for ASTM A453 Grade 660 Chemical Compositions with allowable variation. Chemical analysis of raw material or finished products manufactured to ASTM A453 Grade 660 specification must comply with below analysis. The chemical composition is equivalent to Alloy A286 or UNS S66286 stainless steel used as a raw material to produce 660 bolts, studs and nuts.

ASTM A453 Grade 660 Chemical Composition
Elements Content, % Allowable Variation, Over or Under, %
Carbon 0.08 max 0.01 over
Manganese 2.00 max 0.04
Phosphorus 0.04 max 0.005 over
Sulfur 0.03 max 0.005 over
Silicon 1.00 max 0.05
Nickel 24.00 - 27.00 0.20
Chromium 13.50 - 16.00 0.20
Molybdenum 1.00 - 1.50 0.05
Titanium 1.90 - 2.35 0.05
Aluminium 0.35 0.05 over
Vanadium 0.10 - 0.50 0.03
Boron 0.001 - 0.010 0.0004 under to 0.001 over