3a chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 3a

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STAS/SR 3a

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This page is mainly introduced the 3a chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 3a,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
3a
  • Steel Garde:3a
  • Type:Special Alloy
  • Country:Romania
  • Standard:STAS/SR
  • Application:Structural steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 686~313 σb/MPa
Yield Strength 163 σ 0.2 ≥/MPa
Elongation 89 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 471~686 -
HRC 30 -

Physical Properties

Thermal expansion 30-69 e-6/K
Thermal conductivity 76-76 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 0496-2692 째C
Density 2697-7104 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)
3a 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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