ASTM A182 / A182M UNS K91271

ASTM A182 UNS K91271 is a forging material specification for 9% 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 K91271 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 %
F122 K91271 11 % chromium, 2 % tungsten,
0.2 % vanadium, plus molybdenum, columbium,
copper, nickel, nitrogen, and boron 		Carbon 0.07 - 0.14
Manganese 0.70 max
Phosphorus 0.020 max
Sulfur 0.010 max
Silicon 0.50 max
Nickel 0.50 max
Chromium 10.00 - 11.50
Molybdenum 0.25 - 0.60
Columbium 1.00 - 2.00
Vanadium 0.15 - 0.30
Boron 0.005
Nitrogen 0.040 - 0.100
Aluminium 0.02
Copper 0.30 - 1.70
Tungsten 1.50 - 2.50
Titanium 0.01
Zirconium 0.01

Mechanical Properties

Property Value
Tensile Strength, min, ksi [MPa] 90 [620]
Yield Strength, min, ksi [MPa] 58 [400]
Elongation in 2 in. [50mm] or 4D, min, % 20
Reduction or Area, min, % 40
Brinell Hardness Number, HBW 250 max

Products