M40 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M40

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JIS M40

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This page is mainly introduced the M40 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M40,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
M40
Hardness quartile HRA: 87
Bending strength frequency/MPa: 1569
  • Steel Garde:M40
  • Type:Special Alloy
  • Country:Japan
  • Standard:JIS
  • Application:Carbide for cutting tools

Cross Reference Table(Equivalent Materials):

Material Standard Country
SM400A CNS China
SM400B CNS China
SM400C CNS China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 454~110 σb/MPa
Yield Strength 449 σ 0.2 ≥/MPa
Elongation 54 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 020~369 -
HRC 30 -

Physical Properties

Thermal expansion 57-24 e-6/K
Thermal conductivity 53-42 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 2503-7361 째C
Density 8889-1679 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)
M40 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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