K42544 - ASTM A182/A182M-2025

USA UNS	K42544
ASTM Specification or Grade	F 5a
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	Ni	Mo
Minimum Value	-	-	-	-	-	4	-	0.44
Maximum Value	0.25	0.5	0.6	0.04	0.03	6	0.5	0.65

* The present grade F 5a (0.25 max carbon) previous to 1955 was assigned the identification symbol F 5. Identification symbol F 5 in 1955 was assigned to the 0.15 max carbon grade to be consistent with ASTM specifications for other products such as pipe, tubing, bolting, welding fittings, and the like.

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
≥620	≥450	≥22	≥50	187~248

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