ASTM A182 / A182MUNS K41650

ASTM A182 UNS K41650 is a forging material specification for 4 to 6% 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 K41650 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 %
F23 K41650 2.25% chromium, 1.6% tungsten,
0.25% vanadium, plus molybdenum, columbium, and boron 		Carbon 0.04 - 0.10
Manganese 0.10 - 0.60
Phosphorus 0.030 max
Sulfur 0.010 max
Silicon 0.50 max
Nickel 0.40 max
Chromium 1.90 - 2.60
Molybdenum 0.05 - 0.30
Columbium 0.02 - 0.08
Titanium 0.005 - 0.060
Vanadium 0.20 - 0.30
Boron 0.0010 - 0.006
Nitrogen 0.015
Aluminium 0.030
Tungsten 1.45 - 1.75

Mechanical Properties

Property Value
Tensile Strength, min, ksi [MPa] 74 [510]
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 220 max

Products