A681 Type A3 T30103 - ASTM A681-2024

Grade	A681 Type A3
USA UNS	T30103
AISI American Iron and Steel Institute	A3
Corresponding Standard	ASTM A681-2024 Tool Steels Alloy
Classification	Tool Steel

A681 Type A3 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	V	More
Minimum Value	1.2	0.1	0.4	-	-	4.75	0.9	0.8	Ni+Cu≤0.75
Maximum Value	1.3	0.7	0.6	0.03	0.03	5.5	1.4	1.4	Ni+Cu≤0.75

A681 Type A3 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
condition of delivery	Cold Drawing	BHN ≤255
condition of delivery	Annealing	BHN ≤229
specimen	Preheat at 788±14 ℃, heat at 982±5.6℃(controlled atmosphere) or 968℃(salt bath), hold for 5 to 15 min, air cool. Temper at 204±5.6℃ once for 2 h	HRC ≥63

A681TypeA3 Corresponding Standards(Same grade name, different standards)

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