SKS 31 - JIS G 4404-2015

SKS 31 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	W
Minimum Value	0.95	-	0.9	-	-	0.8	1
Maximum Value	1.05	0.35	1.2	0.03	0.03	1.2	1.5

SKS 31 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
Rolled or Forged Products	Annealing	≤217
Rolled or Forged Products	Quenching and Tempering	HV 720

1 Approximate Comparison Table Plastic Mold Steel

China	Japan	United States	International Organization for Standardization	Germany
GB	JIS	ASTM	ISO	DIN EN/DIN	W-Nr.
CrWMn	SKS 31	07	105WCr1	105WCr6	1.2419

2 Approximate Comparison Table Alloy Tool Steel

China	Japan	South Korea	International Organization for Standardization	Germany
GB	JIS	KS	ISO	DIN EN/DIN
CrWMn	SKS31	STS31	105WCr1	105WCr6

3 Approximate Comparison Table Alloy Tool Steel 2

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