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Formula: Cu 94/Sn 6
Form: Foil (Light Tight)
Material: Phosphor Bronze
Commodity: Alloys
Light Tight: Light Tight

Phosphor Bronze Foil (Light Tight) (Cu94/Sn 6)

Phosphor Bronze Foil Light Tight (Cu94/Sn6) combines the corrosion resistance, strength, and conductivity of phosphor bronze with complete opacity to light, making it ideal for optical and electronic applications requiring light exclusion. The light-tight property is critical in optical instrumentation, precision imaging devices, and experimental setups where ambient light must be fully blocked. It finds applications in aerospace optical sensors, defense imaging systems, and shielding layers in high-precision measurement devices. Specific uses include light-blocking gaskets, optoelectronic shielding layers, and diaphragms for sensitive detectors. In research, it enables accurate measurements in light-sensitive experiments. This combination of mechanical integrity and light-tight performance makes it indispensable for specialized engineering applications.
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Material Properties for Alloys

Mechanical Properties
Element Value
Hardness - Brinell 80-225
Elongation at break( % ) 60
Modulus of elasticity( GPa ) 90-120
Izod impact strength( J m⁻¹ ) 62
Shear strength( MPa ) 250-430
Tensile strength( MPa ) 320-740
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 11.0-16.0
Temperature coefficient( K⁻¹ ) 0.0006-0.0007
Thermal Properties
Element Value
Melting point( C ) 900-1050
Thermal conductivity( W m⁻¹ K⁻¹ ) 50-75@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 17@20-100°C
Physical Properties
Element Value
Density( gcm⁻³ ) 8.9

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