Grade A681 Type F1
USA UNS T60601
AISI
American Iron and Steel Institute
F1
Corresponding Standard ASTM A681-2008(R2015)
Standard Specification for Tool Steels Alloy
Classification Tool Steel
A681 Type F1 Chemical Element Composition Content (%)
Component C Si Mn P S W More
Minimum Value 0.95 0.1 - - - 1 Ni+Cu≤0.75
Maximum Value 1.25 0.5 0.5 0.03 0.03 1.75
A681 Type F1 Mechanical Properties
Heat Treatment or Condition
Hardness
HBW
Bars, thick plates, thin plates, strips, rods, wires, forgings Cold Drawing BHN
≤241
Bars, thick plates, thin plates, strips, rods, wires, forgings Annealing BHN
≤207
Bars, thick plates, thin plates, strips, rods, wires, forgings Heat Treatment HRC
≥64
Approximate Comparison Table Alloy Tool Steel
China Japan South Korea United States Germany United Kingdom
GB JIS KS ASTM DIN EN/DIN BS EN/BS
W SKS21 STS21 F1 120W4 BF1

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