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Formula: Pt 75/Ir 25
Form: Rod
Material: Platinum/Iridium Alloy
Commodity: Precious Metals
Diameter: 2.9mm
Temper: As Drawn

Platinum/Iridium Alloy Rod (Pt75/Ir25)

Goodfellow's range of platinum/iridium alloy rods includes Pt75/Ir25, a high-temperature resistant material composed of 75% platinum and 25% iridium. This alloy combines platinum's excellent corrosion resistance and high-temperature strength with iridium's hardness and wear resistance. With a melting point over 2000°C, Pt75/Ir25 rods maintain mechanical strength and oxidation resistance in extreme environments. Common applications include thermocouple wires, electrical contacts, crucibles, and high-temperature furnace components where durability at high temperatures is critical. As part of Goodfellow's selection of platinum/iridium alloy rods, Pt75/Ir25 provides an optimal balance of properties for demanding high-temperature applications.
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Tolerances

Rod
Diameter =<10mm ±10%
Diameter >10mm ±5%

Material Properties for Precious Metals

Mechanical Properties
Element Value
Elongation at break( % ) 20
Modulus of elasticity( GPa ) 218-220
Hardness - Vickers( kgf mm⁻² ) 230-240
Tensile strength( MPa ) 860-1500
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 31-32
Temperature coefficient( K⁻¹ ) 0.001
Thermal Properties
Element Value
Melting point( C ) 1820-2133
Physical Properties
Element Value
Density( gcm⁻³ ) 21.7

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