30CrMnSiNi2A N31 - GB /T 38809-2020

Grade	30CrMnSiNi2A
China ISC	N31
Corresponding Standard	GB /T 38809-2020 General specification for low alloy ultra-high strength steels
Classification	Alloy Steel

30CrMnSiNi2A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	W	V ^*	More
Minimum Value	0.27	1	1	-	-	0.9	1.4	-	-	-	-	-	S+P≤0.021
Maximum Value	0.33	1.2	1.2	0.015	0.01	1.2	1.8	0.2	0.2	0.03	0.2	0.1	S+P≤0.021

* Added according to the calculated amount and reported as the measured value, not as a basis for judgment.

30CrMnSiNi2A Mechanical Properties

nominal dimension 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 %	Impact Energy Absorption KV2 J
≤200	Sampling Direction Longitudinal	Heat Treatment	≥1620	≥1375	≥9	≥45	KU2 ≥47
≤200	Sampling Direction: Transverse	Heat Treatment	≥1620	≥1375	≥5	≥25	KU2 ≥27
<200~300	Sampling Direction Longitudinal	Heat Treatment	≥1620	≥1375	≥8	≥40	KU2 ≥39
<200~300	Sampling Direction: Transverse	Heat Treatment	≥1620	≥1375	≥5	≥25	KU2 ≥24

30CrMnSiNi2A Corresponding Standards(Same grade name, different standards)

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