34CrNi3Mo - GB /T 17107-1997

Grade	34CrNi3Mo
Corresponding Standard	GB /T 17107-1997 Structural Steel Grades And Mechanical Property For Forgings
Classification	Alloy Steel

34CrNi3Mo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.3	0.17	0.5	-	-	0.7	2.75	-	0.25
Maximum Value	0.4	0.37	0.8	0.035	0.035	1.1	3.25	0.3	0.4

• 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

34CrNi3Mo 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 %	Hardness HBW	Impact Energy Absorption KV2 J
d≤100	Sample Direction: Longitudinal	Tempering	≥900	≥785	≥14	≥40	269~341	≥55
100＜d≤300	Sample Direction: Longitudinal	Tempering	≥850	≥735	≥14	≥38	262~321	≥47
300＜d≤500	Sample Direction: Longitudinal	Tempering	≥805	≥685	≥13	≥35	241~302	≥39
500＜d≤800	Sample Direction: Longitudinal	Tempering	≥755	≥590	≥12	≥32	241~302	≥32

• 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 Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
34CrNi3Mo 34CrNiMo ZG34CrNiMo	SNCM447	4340	36CrNiMo6	34CrNiMo6 GS-34CrNiMo6V	35NCD6	34CrNiMo6	1.6582	36KH2N2MFA 38KH2N2MA 40KHN2MA	2541	817M40

2 Approximate Comparison Table Cast Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
ZG34CrNiMo 34CrNi3Mo 34CrNiMo	SNCM447	4340	36CrNiMo6	GS-34CrNiMo6V 34CrNiMo6	35NCD6	34CrNiMo6	1.6582	36KH2N2MFA 38KH2N2MA 40KHN2MA	2541	817M40

34CrNi3Mo Corresponding Standards(Same grade name, different standards)

1	GB /T 17107-1997
	34CrNi3Mo
2	JB /T 6396-2006
	34CrNi3Mo

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