30CND 8 - NF A 35-557-1983

Grade	30CND 8
Corresponding Standard	NF A 35-557-1983 Iron And Steel — Heat Treatable Steels for Externally Threaded, High Performance Fasteners for Engineering Purposes.
Classification	Alloy Steel
Properties	Strength

30CND 8 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo
Minimum Value	0.26	0.1	0.3	-	-	1.8	1.8	0.3
Maximum Value	0.33	0.4	0.6	0.03	0.025	2.2	2.2	0.5

30CND 8 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW	Impact Energy Absorption KV2 J
Bar, Coil; d=50	Oil Quenching	-	-	-	HR48	-
Bar, coil; d ≤ 50	Quenching and Tempering	1130~1330	≥950	≥10	-	Charpy U Notch ≥50

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

30CND8 Corresponding Standards(Same grade name, different standards)

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