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AISI 309S Stainless Steel Foil

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Properties common to all products in this list

Commodity: Alloys Material: Stainless Steel Form: Foil/Film/Sheet Composition: Fe/Cr 22.3/Ni12.3/Mn1.5/Si.3/C/P/S Grade: AISI 309S UNS Number: S30908 Temper: Annealed
AISI 309S Stainless Steel Foil (UNS S30908) is a low-carbon austenitic stainless steel foil sharing the 22–24% chromium and 12–15% nickel composition of AISI 309, but with carbon restricted to 0.08 wt% maximum to minimise sensitisation in welded and thermally cycled assemblies. It delivers a room-temperature tensile strength of 670 MPa and retains meaningful structural integrity beyond 900 °C. Supplied in the annealed condition at 1.0 mm and 2.0 mm thicknesses, it is fully weldable by GTAW/TIG, GMAW/MIG, SMAW, and SAW processes without the sensitisation risk of higher-carbon grades. Typical applications include furnace mesh, heat-treatment baskets, radiant tube supports, and components in hot acid and sulphur-bearing environments. In research, it provides a metallurgically stable substrate for high-temperature oxidation, sensitisation, and creep studies.
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Material Properties

Mechanical Properties
Element Value
Hardness - Brinell ≤217
Elongation at break( % ) 45
Modulus of elasticity( GPa ) 200
Tensile strength( MPa ) 670
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 78
Thermal Properties
Element Value
Melting point( C ) 1400-1455
Thermal conductivity( W m⁻¹ K⁻¹ ) 15.6@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 15.6@23°C
Physical Properties
Element Value
Density( gcm⁻³ ) 8.03
each

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Available Configurations

Properties common to all products in this list

Commodity: Alloys Material: Stainless Steel Form: Foil/Film/Sheet Composition: Fe/Cr 22.3/Ni12.3/Mn1.5/Si.3/C/P/S Grade: AISI 309S UNS Number: S30908 Temper: Annealed

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Tolerances

Foil/Film/Sheet
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Thickness >0.05mm ±10%
Linear dimension <100mm ±1mm
Linear dimension >=100mm +2 / -1%