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Grade A686 Type W1-9.5 Grade A
USA UNS T72301
Corresponding Standard ASTM A686-1992(R2004)
Standard Specification for Tool Steel, Carbon
Classification Carbon Steel
A686 Type W1-9.5 Grade A Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo W V
Minimum Value 0.95 0.1 0.1 - - - - - - - -
Maximum Value 1.05 0.4 0.4 0.03 0.03 0.15 0.2 0.2 0.1 0.15 0.1
A686 Type W1-9.5 Grade A Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Bars, forgings, thick plates, thin plates, wires Cold Drawing ≤241
Bars, forgings, thick plates, thin plates, wires Annealing ≤202
Bars, forgings, thick plates, thin plates, wires Heat Treatment HRC
≥65
Drill rod; d < 3.2 37
Drill rod; 3.2<d≤6.4 28
Drill rod; 6.4<d≤12.7 23
Drill rod; d>12.7 96
1 Approximate Comparison Table
China Japan United States
GB ISC JIS ASTM UNS
T8Mn T01080 SK85 W1-8 T72301
2 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM UNS Numerical Grade EN
T9 T00090 SK90 W1-8 1/2 T72301 C90U C90U
3 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM UNS Numerical Grade EN
T10 T00100 SK105 W1-10 T72301 C105U C105U
4 Approximate Comparison Table
China United States
GB ISC ASTM UNS
T11 T00110 W1-11 T72301
5 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM UNS ISO EN
T12 T00120 SK120 W1-11 1/2 T72301 C120U C120U
6 Approximate Comparison Table
China United States Germany
GB UNS DIN EN/DIN
T12A T72301
T72301 		C110W1
C105W1
7 Approximate Comparison Table
China United States Germany
GB UNS DIN EN/DIN
T8A T72301 C80W1
8 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
T11 T00110 SK3 SK105 STC3 W1A-10 1/2 T72301 C105U C110W2 1.1654 C105U
~C105E2U 		У11-1 C105U
9 Approximate Comparison Table
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 SS BS EN/BS
T12 T00120 SK2 SK120 STC3 W1A-11 1/2 T72301 C120U C125W2 1.1663 C120U
~C120E3U 		У12-1 1885 C120U
(BW1C)
10 Approximate Comparison Table
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 SS BS EN/BS
T10 T00100 SK4 SK95 STC4 W1A-9 1/2 T72301 TC105 C105W2 1.1645 C105E2U У10-1 1880 BW1B
11 Approximate Comparison Table
China Japan United States International Organization for Standardization France Russia United Kingdom
GB ISC JIS ASTM UNS ISO NF EN/NF GOST BS EN/BS
T9 T00090 SK90 W1A-8 1/2 T72301 C90U C90U
C90E2U 		У9-1 C90U
BW1A
12 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM UNS ISO EN Numerical Grade
T11 T00110 SK105
(SK3) 		W1A-10 1/2 T72301 C105U
(TC105) 		C105U 1.1554
13 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard Russia
GB ISC JIS ASTM UNS ISO EN Numerical Grade GOST
T10 T00100 SK95
(SK4) 		W1A-9 1/2 T72301 C105U
(TC105) 		C105U 1.1554 У10
14 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard Russia
GB ISC JIS ASTM UNS ISO EN Numerical Grade GOST
T9 T00090 SK85
(SK5) 		W1A-8 1/2 T72301 C90U
(TC90) 		C90U 1.1830 У9
15 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard Russia
GB ISC JIS ASTM UNS ISO EN Numerical Grade GOST
T8Mn T01080 SK85
SK85 		W1-C8 T72301 C90U
(TC90) 		C90U 1.1830 У8Г

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