40Sil7A chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 40Sil7A

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STAS/SR 40Sil7A

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This page is mainly introduced the 40Sil7A chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 40Sil7A,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
40Sil7A
  • Steel Garde:40Sil7A
  • Type:Special Alloy
  • Country:Romania
  • Standard:STAS/SR
  • Application:Alloy structural steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 904~299 σb/MPa
Yield Strength 199 σ 0.2 ≥/MPa
Elongation 69 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 636~935 -
HRC 30 -

Physical Properties

Thermal expansion 55-20 e-6/K
Thermal conductivity 15-94 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 7307-6884 째C
Density 3249-2596 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)
40Sil7A 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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