A668 Class N - ASTM A668/A668M-2021 - H2ABC

中文版

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

A668 Class N Chemical Element Composition Content (%)

Component	P	S
Minimum Value	-	-
Maximum Value	0.04	0.025

A668 Class N 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≤100	Normalizing, Quenching, Tempering	≥1175	≥965	≥13	≥40	331~401
100<t≤175	Normalizing, Quenching, Tempering	≥1140	≥930	≥12	≥35	331~401
175<t≤254	Normalizing, Quenching, Tempering	≥1100	≥900	≥11	≥35	321~388
250<t≤500	Normalizing, Quenching, Tempering	≥1100	≥900	≥11	≥35	321~402

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