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

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AMS ER 308

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This page is mainly introduced the ER 308 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of ER 308,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
The welding materials are classified according to chemical composition. The values contained in the mechanical properties are not requirements of this specification. They are obtained from weld metal specified in A5.4.
  • Steel Garde:ER 308
  • Type:Stainless Steels
  • Country:USA
  • Standard:AMS
  • Standard Number:
    ITEM Standard Number Descriptions
    1 SFA-5.9/SFA-5.9M Bare Stainless Steel Welding Electrodes and Rods
  • Metallographic Structure:Austenite
  • Application:This filler metal is the most often used to weld similar composition, in particular, Type 304.

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.08
Si 0.25  0.60
Mn 1.00  2.50
P   0.03
S   0.03
Cr 19.5  22.0
Ni 9.00  11.0
Cu   0.75
Mo   0.75

Mechanical Properties

Tensile strength 811~222 σb/MPa
Yield Strength 976 σ 0.2 ≥/MPa
Elongation 26 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 743~023 -
HRC 30 -

Physical Properties

Thermal expansion 55-89 e-6/K
Thermal conductivity 73-98 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 7058-7287 째C
Density 9124-6450 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)
ER 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