4140H chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 4140H

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AS 4140H

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This page is mainly introduced the 4140H chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 4140H,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
4140H
  • Steel Garde:4140H
  • Type:Special Alloy
  • Country:Australia
  • Standard:AS
  • Application:Australia Structural steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 477~321 σb/MPa
Yield Strength 401 σ 0.2 ≥/MPa
Elongation 91 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 693~076 -
HRC 30 -

Physical Properties

Thermal expansion 23-74 e-6/K
Thermal conductivity 77-51 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 5329-0028 째C
Density 0984-3127 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)
4140H 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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