A681 Type H23 T20823 - ASTM A681-2024

Grade	A681 Type H23
USA UNS	T20823
AISI American Iron and Steel Institute	H23
Corresponding Standard	ASTM A681-2024 Tool Steels Alloy
Classification	Tool Steel

A681 Type H23 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	W	V	More
Minimum Value	0.25	0.15	0.15	-	-	11	11	0.75	Ni+Cu≤0.75
Maximum Value	0.35	0.6	0.4	0.03	0.03	12.75	12.75	1.25	Ni+Cu≤0.75

A681 Type H23 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
condition of delivery	Cold Drawing	BHN ≤269
condition of delivery	Annealing	BHN ≤255
specimen	Preheat to 816±14 ℃, heat to 1260±5.6℃(controlled atmosphere) or 1246℃(salt bath), hold for 5 to 15 min, oil cool. Temper twice at 649±5.6℃, each time for 2 h	HRC ≥42

A681TypeH23 Corresponding Standards(Same grade name, different standards)

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