30Cr2Ni2Mo - GB /T 17107-1997

Grade	30Cr2Ni2Mo
Corresponding Standard	GB /T 17107-1997 Structural Steel Grades And Mechanical Property For Forgings
Classification	Alloy Steel

30Cr2Ni2Mo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.26	0.17	0.3	-	-	1.8	1.8	-	0.3
Maximum Value	0.34	0.37	0.6	0.035	0.035	2.2	2.2	0.3	0.5

• High-quality steel——P≤0.035；S≤0.035；Cu≤0.3；Cr≤0.3；Ni≤0.3
• Extra-quality steel （Suffix A）——P≤0.025；S≤0.025；Cu≤0.25；Cr≤0.3；Ni≤0.3
• Special High-Quality Steel (Suffix E)——P≤0.025；S≤0.015；Cu≤0.25；Cr≤0.3；Ni≤0.3

30Cr2Ni2Mo Mechanical Properties

diameter or thickness d mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
d≤100	Sample Direction: Longitudinal	Tempering	≥1100	≥900	≥10	≥45
100＜d≤160	Sample Direction: Longitudinal	Tempering	≥1100	≥800	≥11	≥50
160＜d≤250	Sample Direction: Longitudinal	Tempering	≥900	≥700	≥12	≥50
250＜d≤500	Sample Direction: Longitudinal	Tempering	≥830	≥635	≥12	-
500＜d≤1000	Sample Direction: Longitudinal	Tempering	≥780	≥590	≥12	-

• The forgings must be inspected for mechanical properties after performance heat treatment and before any surface treatment.
• After the samples are removed, no heat treatments that affect the mechanical properties or any processing that influences the test results shall be conducted.
• Mechanical property testing primarily evaluates the material\'s tensile strength, impact resistance, and hardness. When conducting tensile, impact, and hardness tests simultaneously, the hardness value is for reference only. Alternatively, one may choose to perform only one of the tensile, impact, or hardness tests.

1 Approximate Comparison Table

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

30Cr2Ni2Mo Corresponding Standards(Same grade name, different standards)

1	GB /T 17107-1997
	30Cr2Ni2Mo
2	GB /T 3077-2015
	30Cr2Ni2Mo A50300
3	JB /T 6396-2006
	30Cr2Ni2Mo

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!