Austenitic 309 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Austenitic 309

CNS Austenitic 309

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This page is mainly introduced the Austenitic 309 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Austenitic 309,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
CNS standard heat resistant steel plates
  • Steel Garde:Austenitic 309
  • Type:Special Alloy
  • Country:China
  • Standard:CNS
  • Application:CNS standard heat resistant steel plates

Cross Reference Table(Equivalent Materials):

Material Standard Country
Austenitic 309 CNS China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 879~262 σb/MPa
Yield Strength 901 σ 0.2 ≥/MPa
Elongation 35 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 812~401 -
HRC 30 -

Physical Properties

Thermal expansion 55-50 e-6/K
Thermal conductivity 91-39 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 2890-1399 째C
Density 9087-2973 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)
Austenitic 309 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