ASTM A182 / A182M UNS K31545

ASTM A182 UNS K31545 is a forging material specification for Chromium - Molybdenum alloy steel and is used for manufacturing bare forgings or forged and machined products for applications involving high temperature service. Ferrobend offers forged flanges, fittings, valves bodies, fasteners, plates, bars, rings and similar pressure parts in ASTM A182 UNS K31545 specification.

ASTM A182 specification covers requirements such as chemical composition, mechanical properties, heat treatment and other supplementary requirements for 1 stainless steel forgings and forged products.

Chemical Composition

Grade Symbol UNS Number Alloy Elements Composition %
F21 K31545 chromium-molybdenum Carbon 0.05 - 0.15
Manganese 0.30 - 0.60
Phosphorus 0.040 max
Sulfur 0.040 max
Silicon 0.50 max
Chromium 2.7 - 3.3
Molybdenum 0.80 - 1.06

Mechanical Properties

Property Value
Tensile Strength, min, ksi [MPa] 75 [515]
Yield Strength, min, ksi [MPa] 45 [310]
Elongation in 2 in. [50mm] or 4D, min, % 20
Reduction or Area, min, % 30
Brinell Hardness Number, HBW 156-207