A574 Grade 8740 G87400 - ASTM A574-2017 - H2ABC

中文版

Grade	A574 Grade 8740
USA UNS	G87400
Corresponding Standard	ASTM A574-2017 Alloy Steel Socket-Head Cap Screws
Classification	Alloy Steel

A574 Grade 8740 Chemical Element Composition Content (%)

	Component	C	Si	Mn	P	S	Cr	Ni	Mo
Heat Analysis	Minimum Value	0.38	0.15	0.75	-	-	0.4	0.4	0.2
Heat Analysis	Maximum Value	0.43	0.35	1	0.035	0.04	0.6	0.7	0.3

	Component	C	Si	Mn	P	S	Cr	Ni	Mo
Product Analysis	Minimum Value	0.36	0.13	0.71	-	-	0.37	0.37	0.18
Product Analysis	Maximum Value	0.45	0.37	1.04	0.04	0.045	0.63	0.73	0.32

A574 Grade 8740 Mechanical Properties

	Tensile Strength σ_b ksi	Yield Point σ_s ksi	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
d ≤ 0.5 (Full size)	≥180				HRC 39~44
0.5 < d < 1.0 (Full size)	≥170				37~44
d ≥ 1.0 (Full size)	≥170				37~44
d ≥ 1.0 (Machined)	≥170	≥153	≥10	≥35

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