A681 Type S6 T41906 - ASTM A681-2024

Grade	A681 Type S6
USA UNS	T41906
AISI American Iron and Steel Institute	S6
Corresponding Standard	ASTM A681-2024 Tool Steels Alloy
Classification	Tool Steel

A681 Type S6 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	V	More
Minimum Value	0.4	2	1.2	-	-	1.2	0.3	0.2	Ni+Cu≤0.75
Maximum Value	0.5	2.5	1.5	0.03	0.03	1.5	0.5	0.4	Ni+Cu≤0.75

A681 Type S6 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 941±5.6℃(controllable atmosphere) or 924℃(salt bath), hold for 5 to 15 min, oil cool. Temper at 204±5.6℃ once for 2 h	HRC ≥56

A681TypeS6 Corresponding Standards(Same grade name, different standards)

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