A572 Grade 55 Gr55 - ASTM A572/A572M-2018 - H2ABC

中文版

Grade	A572 Grade 55
Other Names
Corresponding Standard	ASTM A572/A572M-2018 Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
Classification	Alloy Steel
Properties	Strength

A572 Grade 55 Chemical Element Composition Content (%)

	Component	C ^③	Si ^①	Mn ^{② ③}	P ^④	S ^④	Cu	Nb ^⑤	More
Type 1	Minimum Value	-	0.15	-	-	-	-	0.005	/
Type 1	Maximum Value	0.25	0.4	1.35	0.03	0.03	0.2	0.05	/

	Component	C ^③	Si ^①	Mn ^{② ③}	P	S	Cu	V ^⑥	More
Type 2	Minimum Value	-	0.15	-	-	-	-	0.01	/
Type 2	Maximum Value	0.25	0.4	1.35	0.03	0.03	0.2	0.15	/

	Component	C ^③	Si ^①	Mn ^{② ③}	P	S	Cu	V ^⑥	Nb ^⑤	More
Type 3	Minimum Value	-	0.15	-	-	-	-	0.01	0.005	V+Nb：0.02~0.15⑦
Type 3	Maximum Value	0.25	0.4	1.35	0.03	0.03	0.2	0.15	0.05	V+Nb：0.02~0.15⑦

	Component	C ^③	Si ^①	Mn ^{② ③}	P	S	Cu	N	Ti	V	More
Type 5	Minimum Value	-	0.15	-	-	-	-	0.003	0.006	-	/
Type 5	Maximum Value	0.25	0.4	1.35	0.03	0.03	0.2	0.015	0.04	0.06	/

A572 Grade 55 Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
≥485	≥380	(in 50mm) ≥20

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