A681 Type H12 T20812 - ASTM A681-2008(R2015)

Grade	A681 Type H12
USA UNS	T20812
AISI American Iron and Steel Institute	H12
Corresponding Standard	ASTM A681-2008(R2015) Standard Specification for Tool Steels Alloy
Classification	Tool Steel

A681 Type H12 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	W	V	More
Minimum Value	0.3	0.8	0.2	-	-	4.75	1.25	1	0.2	Ni+Cu≤0.75
Maximum Value	0.4	1.25	0.6	0.03	0.03	5.5	1.75	1.7	0.5	Ni+Cu≤0.75

A681 Type H12 Mechanical Properties

form	Heat Treatment or Condition	Hardness HBW
Bars, thick plates, thin plates, strips, rods, wires, forgings	Cold Drawing	BHN ≤262
Bars, thick plates, thin plates, strips, rods, wires, forgings	Annealing	BHN ≤235
Bars, thick plates, thin plates, strips, rods, wires, forgings	Heat Treatment	HRC ≥53

Approximate Comparison Table Alloy Tool Steel 3

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