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Grade A600 T1
USA UNS T12001
AISI
American Iron and Steel Institute		 T1
Corresponding Standard ASTM A600-1992(R2010)
Standard Specification for Tool Steel High Speed
Classification Tool Steel
A600 T1 Chemical Element Composition Content (%)
Component C Si Mn P S Cr W V More
Minimum Value 0.65 0.2 0.1 - - 3.75 17.25 0.9 Ni+Cu≤ 0.75
Maximum Value 0.8 0.4 0.4 0.03 0.03 4.5 18.25 1.3
A600 T1 Mechanical Properties
Heat Treatment or Condition
Hardness
HBW
Bars, forgings, thick plates, thin plates, strip products Cold Drawing HB
≤269
Bars, forgings, thick plates, thin plates, strip products Cold Drawn and Annealed ≤262
Bars, forgings, thick plates, thin plates, strip products Annealing ≤255
Bars, forgings, thick plates, thin plates, strip products Heat Treatment HR
≥63
1 Approximate Comparison Table High-Speed Tool Steels
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 SS14 BS EN/BS
W18Cr4V SKH
SKH2 		T1 HS18-0-1 HS18-0-1 Z80WCV18-04-01 HS18-0-1 1.3355 R18 2750 BT1
2 Approximate Comparison Table High-Speed Tool Steels
China Japan South Korea United States International Organization for Standardization Germany United Kingdom
GB JIS KS ASTM ISO DIN EN/DIN BS EN/BS
W18Cr4V SKH2 SKH2 T1 HS18-0-1 S18-0-1 BT1
3 Approximate Comparison Table High-Speed Steel 2
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST SS14 BS EN/BS
W18Cr4V T51841 SKH 2 SKH 2 SKH 2 T1 T12001 HS 18-0-1 S 18-0-1 1.3355 HS 18-0-1 Р18 2750 HS 18-0-1
BT1
4 Approximate Comparison Table High-Speed Steel 4
China Japan South Korea United States Germany France European Standard Russia Sweden United Kingdom
GB JIS KS ASTM UNS DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS14 BS EN/BS
W18Cr4V SKH2 SKH2 T1 T12001 HS18-0-1
S18-0-1
X75WCrV18-4-1 		1.3355 18-04-01
HS18-0-1
Z80WCV
Z80WCV18-04-01 		HS18-0-1
HSv18-0-1
X75WCrV18-4-1 		1.3355 Р18
R18 		2750 3355
BT1

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