A681 Type S7 T41907 - ASTM A681-2024

Grade	A681 Type S7
USA UNS	T41907
AISI American Iron and Steel Institute	S7
Corresponding Standard	ASTM A681-2024 Tool Steels Alloy
Classification	Tool Steel

A681 Type S7 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	V	More
Minimum Value	0.45	0.2	0.2	-	-	3	1.3	-	Ni+Cu≤0.75
Maximum Value	0.55	1	0.9	0.03	0.03	3.5	1.8	0.35	Ni+Cu≤0.75

A681 Type S7 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 677±14 ℃, heat at 954±5.6℃(controlled atmosphere) or 941℃(salt bath), hold for 5 to 15 min, air cool. Temper at 204±5.6℃ once for 2 h	HRC ≥56

Approximate Comparison Table Alloy Tool Steel 3

A681TypeS7 Corresponding Standards(Same grade name, different standards)

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