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 Steels & 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.(≤)
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 004~739 σb/MPa
Yield Strength 652 σ 0.2 ≥/MPa
Elongation 66 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 679~281 -
HRC 30 -

Physical Properties

Thermal expansion 77-50 e-6/K
Thermal conductivity 88-98 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 8765-5344 째C
Density 7555-7384 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 Steels & 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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