SNCM 431 SNCM 1 - JIS G 4103-1979

Grade	SNCM 431
Old Grade
Corresponding Standard	JIS G 4103-1979 Nickel Chromium Molybdenum Steel
Classification	Alloy Steel

SNCM 431 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.27	0.15	0.6	-	-	0.6	1.6	-	0.15
Maximum Value	0.35	0.35	0.9	0.03	0.03	1	2	0.3	0.3

SNCM 431 Mechanical Properties

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
Quenching + Tempering	≥834	≥686	≥20	≥55	248~302	≥98.1

New and Old Grade Replacement List

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

China	Japan	International Organization for Standardization	Germany	France	European Standard		Russia	United Kingdom
GB	JIS	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	BS EN/BS
30Cr2Ni2Mo	SNCM431	31CrNiMo8	30CrNiMo8	30CND8	30CrNiMo8	1.6580	3KH3M3F	823M30

SNCM431 Corresponding Standards(Same grade name, different standards)

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