30CrMnSi - GB /T 17107-1997

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

30CrMnSi Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.27	0.9	0.8	-	-	0.8	-	-
Maximum Value	0.34	1.2	1.1	0.035	0.035	1.1	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

30CrMnSi 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	≥735	≥590	≥12	≥35	235~293	≥35
100＜d≤300	Sample Direction: Longitudinal	Tempering	≥685	≥460	≥13	≥35	228~269	≥35

• 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		Russia
GB	ISC	GOST
20CrMnSi 30CrMnSi 35CrMnSiA	A24202 A24302 A24303	20ХГС 30ХГС 35ХГСА

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

1	GB /T 3077-1999
	30CrMnSi A24302
2	GB /T 17107-1997
	30CrMnSi
3	GB /T 3077-2015
	30CrMnSi A24302
4	GB /T 3078-2019
	30CrMnSi
5	JB /T 6908-2020
	30CrMnSi A24302

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