308 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 308

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UNS 308

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This page is mainly introduced the 308 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 308,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Chemical compositions of SAE wrought stainless steels
  • Steel Garde:308
  • Type:Stainless Steels
  • Country:USA
  • Standard:UNS
  • Standard Number:
    ITEM Standard Number Descriptions
    1 SAE J 405 (1998) Chemical compositions of SAE wrought stainless steels
  • Metallographic Structure:Austenite
  • Application:Chemical compositions of SAE wrought stainless steels

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.08
Si   1.00
Mn   2.00
P   0.045
S   0.03
Cr 19.0  21.0
Ni 10.0  12.0

Mechanical Properties

Tensile strength 977~416 σb/MPa
Yield Strength 066 σ 0.2 ≥/MPa
Elongation 89 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 294~188 -
HRC 30 -

Physical Properties

Thermal expansion 68-37 e-6/K
Thermal conductivity 83-25 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 7683-0022 째C
Density 6722-0976 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)
308 Stainless 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