ASTM A182 / A182M UNS K31390

ASTM A182 UNS K31390 is a forging material specification for 20% Nickel, 8% Chromium 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 k31390 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 %
F3VCb K31390 3% chromium, 1% molybdenum,
0.25% vanadium plus boron, columbium, and titanium 		Carbon 0.10–0.15
Manganese 0.30 - 0.60
Phosphorus 0.020 max
Sulfur 0.010 max
Silicon 0.10 max
Nickel 0.25 max
Chromium 2.7 - 3.3
Molybdenum 0.90 - 1.10
Columbium 0.015–0.070
Titanium 0.015 max
Vanadium 0.20 - 0.30
Copper 0.25 max
Calcium 0.0005 - 0.0150

Mechanical Properties

Property Value
Tensile Strength, min, ksi [MPa] 85-110 [585-760]
Yield Strength, min, ksi [MPa] 60 [415]
Elongation in 2 in. [50mm] or 4D, min, % 18
Reduction or Area, min, % 45
Brinell Hardness Number, HBW 174-237

Products