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Tantalum/Tungsten Alloy Foil (Light Tight) (Ta97.5/W2.5)

Available Configurations

Properties common to all products in this list

Commodity: Alloys Material: Tantalum/Tungsten Form: Foil (Light Tight) Composition: Ta 97.5/W 2.5 Temper: As Rolled Opacity: Light Tight
Tantalum Tungsten Alloy Foil Light Tight (Ta97.5/W2.5) combines the high corrosion resistance and ductility of tantalum with the strength and heat tolerance of tungsten in a light-tight format that is completely free of pinholes, ensuring total light exclusion. Its thin yet robust profile is suited for demanding applications such as optical isolation barriers, high-temperature shielding, and vacuum-compatible membrane structures. This alloy’s stability under aggressive chemical and thermal conditions makes it valuable in aerospace optics, semiconductor processing, and high-precision instrumentation. Research applications include thin-film photonics experiments, corrosion-resistant coating development, and advanced energy system prototyping. The synergy of alloy performance and light-tight structural integrity ensures consistent results in extreme laboratory and industrial environments.
Starting at $475.00 each
No Minimum order Approx. 2 weeks leadtime Free technical support *Free delivery worldwide

Material Properties

Mechanical Properties
Element Value
Elongation at break( % ) <20
Modulus of elasticity( GPa ) 186
Hardness - Vickers( kgf mm⁻² ) 115-160
Tensile strength( MPa ) 240-310
Thermal Properties
Element Value
Melting point( C ) 3014
Specific heat( J K⁻¹ kg⁻¹ ) 141@23°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 55@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 6.48@20-500°C
Physical Properties
Element Value
Density( gcm⁻³ ) 16.66
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Available Configurations

Properties common to all products in this list

Commodity: Alloys Material: Tantalum/Tungsten Form: Foil (Light Tight) Composition: Ta 97.5/W 2.5 Temper: As Rolled Opacity: Light Tight

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Tolerances

Foil (Light Tight)
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Thickness >0.05mm ±10%
Linear dimension <100mm ±1mm
Linear dimension >=100mm +2 / -1%