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Grade A681 Type A2
USA UNS T30102
AISI
American Iron and Steel Institute		 A2
Corresponding Standard ASTM A681-2008(R2015)
Standard Specification for Tool Steels Alloy
Classification Tool Steel
A681 Type A2 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Mo V More
Minimum Value 0.95 0.1 0.4 - - 4.75 0.9 0.15 Ni+Cu≤0.75
Maximum Value 1.05 0.5 1 0.03 0.03 5.5 1.4 0.5
A681 Type A2 Mechanical Properties
Heat Treatment or Condition
Hardness
HBW
Bars, Thick Plates, Thin Plates, Strips, Rods, Wires, Forgings Cold Drawing BHN
≤262
Bars, Thick Plates, Thin Plates, Strips, Rods, Wires, Forgings Annealing BHN
≤248
Bars, Thick Plates, Thin Plates, Strips, Rods, Wires, Forgings Heat Treatment HRC
≥60
1 Approximate Comparison Table Alloy cold-work tool steel
China Japan United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
Cr5Mo1V SKD12 A2 X100CrMoV5 X100CrMoV5-1 Z100CDV5 X100CrMoV5 1.2363 9KH5VF 2260 BA2
2 Approximate Comparison Table alloy tool stee
Japan United States France United Kingdom
JIS AISI NF EN/NF BS EN/BS
SKD12 A2 Z100CDV5 BA2
3 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF SS BS EN/BS
Cr5Mo1V T20503 SKD 12 SKD 12 STD 12 A2 T30102 X100CrMoV5 X100CrMoV5-1 1.2363 X100CrMoV5 2206 X100CrMoV5
BA2
4 Approximate Comparison Table
China Japan United States Germany France United Kingdom
GB JIS ASTM DIN EN/DIN W-Nr. NF EN/NF BS EN/BS
Cr5Mo1V SKD 12 A2 X100CrMoV5 1 1.2363 Z38CDV5 BA2

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