45B A70452 - GB /T 3077-2015

Grade	45B
China ISC	A70452
Corresponding Standard	GB /T 3077-2015 Alloy Structure Steels
Classification	Alloy Steel
Properties	Strength Hardness Quench Hardness

45B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	B
Minimum Value	0.42	0.17	0.6	-	-	-	-	-	-	0.0008
Maximum Value	0.49	0.37	0.9	0.03	0.03	0.3	0.3	0.3	0.1	0.0035

45B Mechanical Properties

diameter d 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	Impact Energy Absorption KV2 J
d=25	Quenching + Tempering	≥835	≥685	≥12	≥45	≤217	≥47

Approximate Comparison Table Structural Alloy Steel

45B Corresponding Standards(Same grade name, different standards)

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