SMn443 SMn 3 - JIS G 4106-1979

Grade	SMn443
Old Grade
Corresponding Standard	JIS G 4106-1979 Manganese Steels and Manganese Chromium Steels for Machine Structural Use
Classification	Alloy Steel

SMn443 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.4	0.15	1.35	-	-	-	-	-
Maximum Value	0.46	0.35	1.65	0.03	0.03	0.35	0.25	0.3

SMn443 Mechanical Properties

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
Quenching + Tempering	≥932	≥785	≥17	≥45	229~302	≥78

New and Old Grade Replacement List

1 Approximate Comparison Table Structural Alloy Steel

China		Taiwan, China	Japan	South Korea	United States		International Organization for Standardization	France	European Standard		Russia
GB	ISC	CNS	JIS	KS	ASTM/AISI	UNS	ISO	NF EN/NF	EN	Numerical Grade	GOST
40Mn2	A00402	SMn438	SMn438 SMn443	SMn438	1340	G13400	42Mn6	40M5	42Mn6	1.1055	40Г2

2 Approximate Comparison Table Structural Alloy Steel

3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

Japan	United States	International Organization for Standardization	European Standard
JIS	SAE	ISO	EN	Numerical Grade
SMn443	1541	42Mn6	42Mn6	1.1055

4 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

SMn443 Corresponding Standards(Same grade name, different standards)

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