34Cr2Ni2Mo - GB /T 17107-1997

Grade	34Cr2Ni2Mo
Corresponding Standard	GB /T 17107-1997 Structural Steel Grades and Mechanical Property for Forgings
Classification	Alloy Steel

34Cr2Ni2Mo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.3	0.17	0.4	-	-	1.4	1.4	-	0.15
Maximum Value	0.38	0.37	0.7	0.035	0.035	1.7	1.7	0.3	0.3

• 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

34Cr2Ni2Mo 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	≥1000	≥800	≥11	≥50
100＜d≤160	Sample Direction: Longitudinal	Tempering	≥900	≥700	≥12	≥55
160＜d≤250	Sample Direction: Longitudinal	Tempering	≥800	≥600	≥13	≥55
250＜d≤500	Sample Direction: Longitudinal	Tempering	≥740	≥540	≥14	-
500＜d≤1000	Sample Direction: Longitudinal	Tempering	≥690	≥490	≥15	-

• 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.

Approximate Comparison Table Structural Alloy Steel

China	International Organization for Standardization	European Standard
GB	ISO	EN	Numerical Grade
34Cr2Ni2Mo	34CrNiMo6	34CrNiMo6	1.6582

34Cr2Ni2Mo Corresponding Standards(Same grade name, different standards)

1	GB /T 17107-1997
	34Cr2Ni2Mo
2	GB /T 3077-2015
	34Cr2Ni2Mo A50342
3	JB /T 6396-2006
	34Cr2Ni2Mo

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