Iridium Rod

Iridium Rod combines extreme corrosion resistance, mechanical strength, and high melting point in a dense cylindrical form suitable for precision machining. Its durability under aggressive chemical and thermal environments makes it valuable in aerospace, energy, and electronics. Industries use iridium rods for spark plug electrodes, high-temperature probes, and components exposed to corrosive gases. Technologies benefiting include aerospace thrusters, electrochemical testing systems, and precision metrology instruments. Research applications include long-term corrosion resistance studies, alloy prototype development, and electrode performance testing in fuel cells. The rod format allows precise machining and structural integration, providing reliability where dimensional stability and chemical inertness are critical. Its combination of strength, durability, and functional versatility ensures iridium rods remain essential in high-performance industrial and scientific systems.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Rod

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

Material Properties for Precious Metals

Atomic Properties

Element	Value
Atomic number	77
Crystal structure	Face centred cubic
Electronic structure	Xe 4f¹⁴ 5d⁷ 6s²
Valences shown	3, 4
Atomic weight( amu )	192.22
Thermal neutron absorption cross-section( Barns )	425
Photo-electric work function( eV )	4.6
Natural isotope distribution( Mass No./% )	191/ 37.3
Natural isotope distribution( Mass No./% )	193/ 62.7
Atomic radius - Goldschmidt( nm )	0.135

Mechanical Properties

Element	Value
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.26
Poisson's ratio	0.26
Bulk modulus( GPa )	371
Bulk modulus( GPa )	371
Tensile modulus( GPa )	528
Tensile modulus( GPa )	528
Hardness - Vickers( kgf mm⁻² )	650
Hardness - Vickers( kgf mm⁻² )	200-300
Tensile strength( MPa )	550-1100
Tensile strength( MPa )	1200

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	5.1@20@20°C
Superconductivity critical temperature( K )	0.11
Temperature coefficient( K⁻¹ )	0.0045@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.65

Physical Properties

Element	Value
Boiling point( C )	4130
Density( gcm⁻³ )	22.4@20°C

Thermal Properties

Element	Value
Melting point( C )	2410
Latent heat of evaporation( J g⁻¹ )	3186
Latent heat of fusion( J g⁻¹ )	135
Specific heat( J K⁻¹ kg⁻¹ )	133@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	147@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	6.8@0-100°C