M78 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M78

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AFNOR M78

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This page is mainly introduced the M78 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M78,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
  • Steel Garde: M78
  • Type:Special Alloy
  • Country:France
  • Standard:AFNOR
  • Application:Carbide for cutting tools

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 127~182 σb/MPa
Yield Strength 393 σ 0.2 ≥/MPa
Elongation 50 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 316~174 -
HRC 30 -

Physical Properties

Thermal expansion 44-51 e-6/K
Thermal conductivity 22-57 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 2653-5660 째C
Density 9065-0980 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)
M78 Special Alloy 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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