Duplex Stainless Steel Foil (Light Tight)

Duplex Stainless Steel Foil (Light Tight) combines the high strength, corrosion resistance, and phase-balanced microstructure of duplex stainless steels with the critical property of complete light impermeability. This dual-phase alloy structure, composed of nearly equal proportions of ferrite and austenite, provides exceptional resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking. The light-tight feature—free from pinholes—makes it indispensable for applications where optical interference or stray light must be eliminated. Key industries using this material include marine engineering, chemical processing, and advanced optics manufacturing. Specific uses include optical shielding in photonic devices, light-blocking layers in precision instrumentation, and corrosion-resistant barriers in offshore sensor housings. In research, this foil serves as an advanced model material for studying the interplay between microstructural phase balance, light-blocking integrity, and mechanical performance under extreme conditions. Its combination of mechanical robustness, corrosion resistance, and optical shielding capabilities ensures high value in demanding industrial and scientific contexts.

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Properties

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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