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Home Material BS 4659-1971
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Grade BW1B
Corresponding Standard BS 4659-1971
Tool Steel
Classification Tool Steel
BW1B Chemical Element Composition Content (%)
Component C Si Mn Cr Ni Mo
Minimum Value 0.95 - - - - -
Maximum Value 1.1 0.3 0.35 0.15 0.2 0.1
BW1B Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Steel Annealed at 740~790°C ≤207
Steel Water Quenching 770~790°C, Tempering 180~350°C HV: ≥790
1 Approximate Comparison Table Non-Alloy Cold-Work 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 SS BS EN/BS
T10A SK3 W5 C105U C105W1 C105E2U C105U 1.1545 U10A 1880 BW1B
2 Approximate Comparison Table Carbon Tool Steel
China Japan United States International Organization for Standardization Germany France Russia United Kingdom
GB JIS ASTM ISO DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
T10 SK4 W1-91/2 TC105 C105W2 1.1645 Y1 105 У10 BW1B
3 Approximate Comparison Table Carbon Tool Steel
United States Germany France United Kingdom
AISI DIN EN/DIN NF EN/NF BS EN/BS
W1 C105W1 Y1 05 BW1B
4 Approximate Comparison Table Carbon Tool Steel
China Japan South Korea United States International Organization for Standardization Germany United Kingdom
GB JIS KS ASTM ISO DIN EN/DIN BS EN/BS
T10 SK3
SK4 		STC3
STC4 		W1A-91/2 TC105 C105W2 BW1B
5 Approximate Comparison Table Carbon Tool Steel 1
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

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