Grade A681 Type D7
USA UNS T30407
AISI
American Iron and Steel Institute
D7
Corresponding Standard ASTM A681-2008(R2015)
Standard Specification for 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
A681 Type D7 Mechanical Properties
form Tensile Strength
σb
Mpa
Hardness
HBW
Bars, Thick Plates, Thin Plates, Strips, Rods, Wires, Forgings Cold Drawing BHN
≤277
Bars, Thick Plates, Thin Plates, Strips, Rods, Wires, Forgings Annealing BHN
≤262
Bars, Thick Plates, Thin Plates, Strips, Rods, Wires, Forgings Heat Treatment HRC
≥63
A681TypeD7 Corresponding Standards(Same grade name, different standards)

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