A681 Type S1 T41901 - ASTM A681-2008(R2015)

Grade	A681 Type S1
USA UNS	T41901
AISI American Iron and Steel Institute	S1
Corresponding Standard	ASTM A681-2008(R2015) Standard Specification for Tool Steels Alloy
Classification	Tool Steel

A681 Type S1 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	W	V	More
Minimum Value	0.4	0.15	0.1	-	-	1	-	1.5	0.15	Ni+Cu≤0.75
Maximum Value	0.55	1.2	0.4	0.03	0.03	1.8	0.5	3	0.3	Ni+Cu≤0.75

A681 Type S1 Mechanical Properties

	Heat Treatment or Condition	Hardness HBW
Bars, thick plates, thin plates, strips, rods, wires, forgings	Cold Drawing	BHN ≤255
Bars, thick plates, thin plates, strips, rods, wires, forgings	Annealing	BHN ≤229
Bars, thick plates, thin plates, strips, rods, wires, forgings	Heat Treatment	HRC ≥56

1 Approximate Comparison Table Alloy cold-work tool steel

China	United States	International Organization for Standardization	Germany	France	European Standard		Russia	United Kingdom
GB	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	BS EN/BS
6CrW2Si	S1	60WCrV8	60WCrV7	55WC20	60WCrV8	1.2550	5KHV2S	BS1

2 Approximate Comparison Table alloy tool stee

3 Approximate Comparison Table

China		United States		International Organization for Standardization	Germany		France	Russia	Sweden	United Kingdom
GB	ISC	ASTM	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	SS	BS EN/BS
5CrW2Si	T40125	S1	T41901	50WCrV8	≈45WCrV7	1.2542	50WCrV8	5ХВ2С	~2710	50WCrV8 BS1

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