A681 Type H21 T20821 - ASTM A681-2008(R2015)

Grade	A681 Type H21
USA UNS	T20821
AISI American Iron and Steel Institute	H21
Corresponding Standard	ASTM A681-2008(R2015) Standard Specification for Tool Steels Alloy
Classification	Tool Steel

A681 Type H21 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	W	V	More
Minimum Value	0.26	0.15	0.15	-	-	3	8.5	0.3	Ni+Cu≤0.75
Maximum Value	0.36	0.5	0.4	0.03	0.03	3.75	10	0.6	Ni+Cu≤0.75

A681 Type H21 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 ≥52

Approximate Comparison Table Alloy Tool Steel

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