K12122 - ASTM A182/A182M-2025

USA UNS	K12122
ASTM Specification or Grade	F 2
Corresponding Standard	ASTM A182/A182M-2025 Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
Classification	Alloy Steel
Properties	Corrosion Resistance

Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.05	0.1	0.3	-	-	0.5	0.44
Maximum Value	0.21	0.6	0.8	0.04	0.04	0.81	0.65

* Grade F 2 was formerly assigned to the 1 % chromium, 0.5 % molybdenum grade which is now Grade F 12.

Mechanical Properties

Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
≥485	≥275	≥20	≥30	143~192

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!