A681 Type S2 T41902 - ASTM A681-2024

Grade	A681 Type S2
USA UNS	T41902
AISI American Iron and Steel Institute	S2
Corresponding Standard	ASTM A681-2024 Tool Steels Alloy
Classification	Alloy Steel

A681 Type S2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Mo	V	More
Minimum Value	0.4	0.9	0.3	-	-	0.3	-	Ni+Cu≤0.75
Maximum Value	0.55	1.2	0.5	0.03	0.03	0.6	0.5	Ni+Cu≤0.75

A681 Type S2 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
condition of delivery	Cold Drawing	BHN ≤241
condition of delivery	Annealing	BHN ≤217
specimen	Preheat at 677±14 ℃, heat at 899±5.6℃(controllable atmosphere) or 885℃(salt bath), hold for 5 to 15 min, brine cool. Temper at 204±5.6℃ once for 2 h	HRC ≥58

A681TypeS2 Corresponding Standards(Same grade name, different standards)

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