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BT1 material is B.S. BS 4659 High speed tool steel W series high speed steel.

Chemical composition of BT1, BT1 mechanical properties, BT1 datasheet, BT1 equivalent grade, Heat treatment and temperature process of BT1.

BT1 property sheet

BT1 Spec.

B.S. BS 4659
High speed tool steel

Related Materials


Chemical Composition of BT1

C: 0.70 0.80
Si: Max 0.40
Mn: Max 0.40
Co: Max 1.00
Cr: 3.75 4.50
Mo: Max 0.70
Ni: Max 0.40
V: 1.00 1.25
W: 17.5 18.5
Cu: Max 0.20
Sn: Max 0.05

Mechanical Properties of BT1

Rp0.2 (MPa) 427 (≥)
Rm (MPa) 525 (≥)
AKV (J) 43
A (%) 14
Z (%) 41
Hardness HBW 213

BT1 shape and dimensions

BT1 Round bar: 1mm-800mm
BT1 Square bar: 10mm * 10mm-600mm *600mm
BT1 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
BT1 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
BT1 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
BT1 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes