12MnCuCr - GB /T 4172-1984

Grade	12MnCuCr
Corresponding Standard	GB 4172-1984 Atmosphere Corrosion Resisting Steel for Welded Structure
Classification	Alloy Steel

12MnCuCr Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^*	Cu	Mo ^*	Ti ^*	V ^*	Nb ^*	Zr ^*	Al ^*
Minimum Value	0.08	0.15	0.6	-	-	0.3	-	0.2	-	0.02	0.02	0.015	-	0.015
Maximum Value	0.15	0.35	1	0.04	0.04	0.65	0.65	0.4	0.3	0.1	0.15	0.05	0.15	-

12MnCuCr Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤16	≥421	≥294	≥22	-
16＜t≤40	≥421	≥284	≥24	0°C: ≥27 -20°C: ≥27
t＞40	≥412	≥265	≥22	0°C: ≥27 -20°C: ≥27

New and Old Grade Replacement List

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