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Home Material BS 4659-1989
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Grade BT5
Corresponding Standard BS 4659-1989
Specification for Tool and Die Steels
Classification Tool Steel
BT5 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo W V Co Sn
Minimum Value 0.75 - - - - 3.75 - - - 18.5 1.75 9 -
Maximum Value 0.85 0.4 0.4 0.035 0.035 4.5 0.4 0.2 1 19.5 2.05 10 0.05
BT5 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Steel Annealing ≤290
Steel Quenching + Tempering HV
≥869
1 Approximate Comparison Table High-Speed Tool Steels
Japan United States International Organization for Standardization France United Kingdom
JIS ASTM/AISI ISO NF EN/NF BS EN/BS
SKH4 T5 HS18-0-1-10 HS18-0-2-9 BT5
2 Approximate Comparison Table High-Speed Steel 2
China Taiwan, China Japan South Korea United States Germany France Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS DIN EN/DIN W-Nr. NF EN/NF SS14 BS EN/BS
W18Cr4V2Co8 T71848 ≈SKH 4 ≈SKH 4 ≈SKH 4 T5 T12005 ≈S 18-1-2 1.3265 HS 18-0-2-9 2756 BT5
3 Approximate Comparison Table High-Speed Steel 1
China Japan United States International Organization for Standardization Germany United Kingdom
GB JIS ASTM ISO DIN EN/DIN W-Nr. BS EN/BS
W18Cr4V2Co8 SKH4A T5 HS18-0-1-10 S18-1-2-10 1.3265 BT5

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