30Cr2Ni4Mo A50300 - GB /T 3077-2015

30Cr2Ni4Mo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.26	0.17	0.5	-	-	1.2	3.3	-	0.3
Maximum Value	0.33	0.37	0.8	0.03	0.03	1.5	4.3	0.3	0.6

30Cr2Ni4Mo 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	≥1080	≥930	≥10	≥50	≤269	≥71

1 Approximate Comparison Table Alloy Steel for Quenching and Tempering

China		Japan	International Organization for Standardization	Germany		European Standard
GB	ISC	JIS	ISO	DIN EN/DIN	W-Nr.	EN	Numerical Grade
30Cr2Ni2Mo	A50300	SNCM431	30CrNiMo8	30CrNiMo8	1.6580	30CrNiMo8	1.6580

2 Approximate Comparison Table Structural Alloy Steel

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