BT1 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of BT1

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B.S. BT1

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This page is mainly introduced the BT1 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of BT1,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
W series high speed steel
  • Steel Garde:BT1
  • Type:Tool Die Steels
  • Country:UK
  • Standard:B.S.
  • Standard Number:
    ITEM Standard Number Descriptions
    1 BS 4659 High speed tool steel
  • Application:W series high speed steel

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.70  0.80
Si   0.40
Mn   0.40
Co   1.00
Cr 3.75  4.50
Mo   0.70
Ni   0.40
V 1.00  1.25
W 17.5  18.5
Cu   0.20
Sn   0.05

Mechanical Properties

Tensile strength 937~329 σb/MPa
Yield Strength 375 σ 0.2 ≥/MPa
Elongation 20 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 087~383 -
HRC 30 -

Physical Properties

Thermal expansion 00-81 e-6/K
Thermal conductivity 10-56 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 1407-7462 째C
Density 4900-9877 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m
     

Heat Treatment Regime

Annealing

Quenching

Tempering

Normalizing

Q & T

Size Availability

Steel Grade Specification Processing range(mm)
BT1 Tool Die Steels Round Bar and Hollow Bar Φ1 to Φ2000
Square and Flat Steel Φ10 to Φ100
Plate and Sheet 0.08-800(Thickness)*10-1500(Width)*Length
Tube or Pipe OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
Coil and Strip Steel THK:0.1mm Width:1500mm
Forged Ring/Cylindrical/Disk

Technical specification/standard for download

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