A681 Type D7 T30407 - ASTM A681-2024

Grade	A681 Type D7
USA UNS	T30407
AISI American Iron and Steel Institute	D7
Corresponding Standard	ASTM A681-2024 Tool Steels Alloy
Classification	Tool Steel

A681 Type D7 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	V	More
Minimum Value	2.15	0.1	0.1	-	-	11.5	0.7	3.8	Ni+Cu≤0.75
Maximum Value	2.5	0.6	0.6	0.03	0.03	13.5	1.2	4.4	Ni+Cu≤0.75

A681 Type D7 Mechanical Properties

condition	Tensile Strength σ_b Mpa	Hardness HBW
condition of delivery	Cold Drawing	BHN ≤277
condition of delivery	Annealing	BHN ≤262
specimen	Preheat to 816±14 ℃, heat to 1066±5.6℃(controllable atmosphere) or 1052℃(salt bath), hold for 10 to 20 min, air cool. Temper at 204±5.6℃ once for 2 h	HRC ≥63

A681TypeD7 Corresponding Standards(Same grade name, different standards)

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