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Formula: Pt 90/Rh 10
Form: Tube
Material: Platinum/Rhodium
Commodity: Precious Metals
Temper: As Drawn

Platinum/Rhodium Alloy Tube (Pt90/Rh10)

Platinum/Rhodium Alloy Tube (Pt90/Rh10) combines the exceptional chemical inertness of platinum with the enhanced high-temperature strength and oxidation resistance imparted by rhodium. The tube form is particularly valuable in thermocouple protection, catalyst carrier structures, and high-purity gas handling in corrosive or extreme thermal environments. Widely used in aerospace, glass manufacturing, and chemical processing, Pt90/Rh10 tubes maintain structural integrity and resist embrittlement during prolonged high-heat exposure. Specific applications include protective sheathing for Type S and R thermocouples, platinum-based catalytic reactor components, and platinum-lined feed tubes in specialty glass production. In research, they are deployed in molten metal sampling systems, advanced fuel cell prototypes, and high-purity material synthesis setups. The alloy’s stability at temperatures exceeding 1600 °C makes it indispensable for precision processes where accuracy, purity, and durability are critical.
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Tolerances

Tube
Outside Diameter =<2mm ±0.05mm
Outside Diameter 2mm - 5mm ±0.1mm
Outside Diameter >5mm ±5%
Wall Thickness ±10%

Material Properties for Precious Metals

Mechanical Properties
Element Value
Hardness - Brinell 90-165
Elongation at break( % ) 35
Tensile strength( MPa ) 320-620
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 18.4-19.2
Temperature coefficient( K⁻¹ ) 0.0017
Thermal Properties
Element Value
Melting point( C ) 1830-1855
Thermal conductivity( W m⁻¹ K⁻¹ ) 38@23°C
Physical Properties
Element Value
Density( gcm⁻³ ) 19.97

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