Duplex Stainless Steel Foil

Duplex Stainless Steel Foil offers a unique combination of high mechanical strength, excellent corrosion resistance, and good weldability due to its balanced austenitic–ferritic microstructure. The dual-phase structure provides superior resistance to chloride stress corrosion cracking and pitting compared to conventional austenitic stainless steels, while maintaining good ductility and toughness. In foil form, its thin cross-section enables precise fabrication for applications requiring both structural integrity and corrosion resistance. Industries such as chemical processing, marine engineering, and energy systems utilize duplex stainless steel foil for heat exchanger plates, chemical reactor linings, and sealing components in corrosive environments. Specific uses include gasket materials for offshore oil and gas installations, thin corrosion barriers in desalination plants, and flexible metallic membranes in fuel cell stacks. In research, duplex stainless steel foils serve as model systems for studying phase balance effects, localized corrosion mechanisms, and microstructural optimization at reduced thicknesses. Its combination of resilience, chemical stability, and formability makes it a vital material for demanding scientific and industrial applications.

Quick Links:

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	290
Elongation at break( % )	<25
Modulus of elasticity( GPa )	200

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	80
Temperature coefficient( K⁻¹ )	-

Thermal Properties

Element	Value
Melting point( C )	1440
Specific heat( J K⁻¹ kg⁻¹ )	500@23°C
Thermal conductivity( W m⁻¹ K⁻¹ )	19@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	13.7@20-100°C