70Si7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 70Si7

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DIN 70Si7

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This page is mainly introduced the 70Si7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 70Si7,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Alloyed Si steel

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.65  0.75
Si 1.50  1.80
Mn 0.60  0.80
P   0.030
S   0.030
Cr  
Mo  
V  

Mechanical Properties

Tensile strength 484~322 σb/MPa
Yield Strength 920 σ 0.2 ≥/MPa
Elongation 05 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 042~471 -
HRC 30 -

Physical Properties

Thermal expansion 68-87 e-6/K
Thermal conductivity 03-45 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 2378-5838 째C
Density 5358-4204 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)
70Si7 Tool 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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