A681 Type P4 T51604 - ASTM A681-2008(R2015)

Grade	A681 Type P4
USA UNS	T51604
AISI American Iron and Steel Institute	P4
Corresponding Standard	ASTM A681-2008(R2015) Standard Specification for Tool Steels Alloy
Classification	Tool Steel

A681 Type P4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	More
Minimum Value	-	0.1	0.2	-	-	4	0.4	Ni+Cu≤0.75
Maximum Value	0.12	0.4	0.6	0.03	0.03	5.25	1	Ni+Cu≤0.75

A681 Type P4 Mechanical Properties

form	Heat Treatment or Condition	Hardness HBW
Bars, thick plates, thin plates, strips, rods, wires, forgings	Annealing	BHN ≤131

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