A681 Type H25 T20825 - ASTM A681-2024

Grade	A681 Type H25
USA UNS	T20825
AISI American Iron and Steel Institute	H25
Corresponding Standard	ASTM A681-2024 Tool Steels Alloy
Classification	Tool Steel

A681 Type H25 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	W	V	More
Minimum Value	0.22	0.15	0.15	-	-	3.75	14	0.4	Ni+Cu≤0.75
Maximum Value	0.32	0.4	0.4	0.03	0.03	4.5	16	0.6	Ni+Cu≤0.75

A681 Type H25 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
condition of delivery	Cold Drawing	BHN ≤262
condition of delivery	Annealing	BHN ≤235
specimen	Preheat at 788±14 ℃, heat at 1246±5.6℃(controlled atmosphere) or 1232℃(salt bath), hold for 5 to 15 min,air cool. Temper twice at 552±5.6℃, each time for 2 h	HRC ≥44

A681TypeH25 Corresponding Standards(Same grade name, different standards)

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