AISI 347 Stainless Steel Foil

AISI 347 Stainless Steel Foil is a niobium-stabilized austenitic alloy developed for high resistance to intergranular corrosion, oxidation, and creep at elevated temperatures, making it ideal for precision-engineered thin-section applications. The foil form ensures uniform thickness, surface quality, and flexibility, enabling it to be shaped or layered into complex assemblies. It is widely employed in aerospace recuperators, chemical processing liners, and heat shields in high-performance engines. Specific uses include compact heat exchanger plates, catalyst carrier substrates in emission control systems, and flexible substrates for advanced electronic displays. In research, AISI 347 foil is utilized in studies of creep rupture behavior, oxidation resistance, and surface engineering to extend operational lifespans in aggressive environments. Its combination of thermal stability, corrosion resistance, and precision manufacturability ensures enduring value for both industrial production and cutting-edge scientific applications.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±25%
Thickness	>0.05mm	±10%

Material Properties for Alloys

Mechanical Properties

Element	Value
Hardness - Brinell	160-190
Elongation at break( % )	<60
Modulus of elasticity( GPa )	190-210
Izod impact strength( J m⁻¹ )	20-136
Tensile strength( MPa )	520-1100

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	70-73

Thermal Properties

Element	Value
Maximum use temperature in air( C )	800
Melting point( C )	1400-1425
Thermal conductivity( W m⁻¹ K⁻¹ )	16.3@100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	16-18@20-100°C