A668 Class C - ASTM A668/A668M-2021

Grade	A668 Class C
Corresponding Standard	ASTM A668/A668M-2021 Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use
Classification	Carbon Steel

A668 Class C Chemical Element Composition Content (%)

Component	Mn	P	S
Minimum Value	-	-	-
Maximum Value	1.35	0.05	0.025

A668 Class C Mechanical Properties

Controlling Cross Section t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
t≤300	Annealing or Normalizing or Normalizing + Tempering	≥455	≥230	≥23	≥36	137~183
300<t≤500	Annealing or Normalizing or Normalizing + Tempering	≥455	≥230	≥22	≥34	137~183

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