Iridium

High Purity Iridium Metal Products Manufacturer & Supplier

Iridium is one of the world's most corrosion-resistant and heat-resistant platinum group metals, widely used for crystal growth equipment, semiconductor manufacturing and advanced industrial applications.

What is Iridium?

Iridium (Ir) Iridium (Ir) is a dense, corrosion-resistant precious metal belonging to the platinum group metals (PGMs). It possesses one of the highest melting points among all precious metals, outstanding chemical stability and exceptional resistance to oxidation, making it an ideal engineering material for extremely demanding industrial applications.

Due to its remarkable thermal stability and mechanical strength, iridium has become the preferred material for manufacturing crystal growth crucibles, high-temperature laboratory equipment, semiconductor processing components, aerospace parts and advanced scientific instruments operating under aggressive environments.

Sunny Steel supplies a comprehensive range of high purity iridium products including standard stock materials and precision machined custom components manufactured according to customer drawings and international quality requirements.

Physical Properties of Iridium

Iridium possesses one of the highest melting temperatures among all metallic elements and demonstrates exceptional mechanical stability under extremely high operating temperatures. Its remarkable density, corrosion resistance and excellent oxidation resistance make it one of the most valuable engineering materials for harsh industrial environments.

Property Value
Element Symbol Ir
Atomic Number 77
Atomic Weight 192.217 g/mol
Density 22.56 g/cm³
Melting Point 2446 °C
Boiling Point 4428 °C
Crystal Structure Face-Centered Cubic (FCC)
Hardness Approx. 6.5 Mohs
Electrical Resistivity Approximately 5.1 μΩ·cm (20°C)
Thermal Conductivity 147 W/m·K
Elastic Modulus Approximately 528 GPa
Coefficient of Thermal Expansion 6.4 ×10⁻⁶ /K

These outstanding physical characteristics enable iridium components to maintain dimensional stability, structural integrity and excellent durability under prolonged high-temperature service conditions.

Chemical Properties

Iridium is recognized as one of the most chemically stable metals known. At room temperature it is essentially unaffected by air, moisture, most mineral acids and alkalis. Even under elevated temperatures, its oxidation rate remains extremely low compared with conventional engineering metals.

Chemical Advantages
  • Outstanding corrosion resistance
  • Excellent oxidation resistance
  • Resistant to molten glass attack
  • High resistance to molten oxides
  • Excellent chemical inertness
  • Superior stability under vacuum
Industrial Benefits
  • Long operating lifetime
  • Reduced contamination
  • Low maintenance cost
  • Excellent thermal reliability
  • Suitable for aggressive environments
  • High purity process compatibility

Crystal Structure and Metallurgy

Iridium crystallizes in a face-centered cubic (FCC) lattice, providing an excellent balance between mechanical strength and structural stability. Unlike many refractory metals, iridium maintains its crystal integrity under repeated thermal cycling and prolonged exposure to elevated temperatures.

Its metallurgical characteristics allow precision fabrication into various semi-finished and finished products including rods, wires, sheets, tubes, crucibles, sputtering targets and custom-engineered components.

Key Material Characteristics

High Temperature

Exceptional resistance to temperatures exceeding 2000°C makes iridium indispensable for crystal growth furnaces and thermal processing equipment.

Corrosion Resistance

Iridium remains highly stable in corrosive chemical environments where conventional stainless steels and nickel alloys may fail.

High Purity

Ultra-high purity iridium materials minimize contamination during semiconductor processing, crystal growth and laboratory applications.

Available Forms

Iridium Product

Sunny Steel supplies a comprehensive range of high-purity iridium products for semiconductor, crystal growth, aerospace, laboratory and advanced industrial applications.

Due to its exceptionally high melting point and outstanding mechanical strength, iridium is one of the most challenging precious metals to manufacture. Modern production combines powder metallurgy, vacuum melting technologies and precision machining to ensure superior purity, dimensional accuracy and long-term reliability.

Powder Metallurgy

High-purity iridium powder is compacted and sintered under controlled atmospheres to achieve excellent density and uniform microstructure.

Vacuum Melting

Vacuum arc melting and electron beam melting minimize contamination, improve purity and ensure excellent metallurgical quality.

Precision Machining

CNC machining, EDM and precision grinding are used to manufacture high-accuracy iridium components for demanding industrial applications.
Grade Iridium Content Typical Application
Commercial Grade 99.90% General industrial applications
High Purity 99.95% Crystal growth equipment
Ultra High Purity 99.99% Semiconductor and research laboratories
  • Exceptional resistance to oxidation at elevated temperatures
  • Outstanding corrosion resistance against aggressive chemicals
  • Extremely high melting point suitable for thermal processing
  • Excellent dimensional stability during repeated heating cycles
  • High mechanical strength and creep resistance
  • Long service life reduces maintenance frequency
  • Excellent purity minimizes material contamination
  • Suitable for vacuum and inert atmosphere processes
  • Available in custom sizes and fabricated components
  • Ideal for high-value industrial and scientific applications
Frequently Asked Questions
Iridium (Ir) is a platinum group metal (PGM) with atomic number 77. It is one of the densest and most corrosion-resistant metals known, offering exceptional chemical stability, high-temperature strength and a melting point of approximately 2446°C.
Iridium is widely used for crystal growth crucibles, semiconductor manufacturing equipment, spark plug electrodes, laboratory apparatus, aerospace components, electrochemical electrodes and other high-temperature industrial applications.
Iridium is one of the rarest naturally occurring elements on Earth. Limited mining production, complex refining processes and strong demand from semiconductor, crystal growth and aerospace industries contribute to its high market value.
Pure iridium has a melting point of approximately 2446°C (4435°F), making it one of the highest melting precious metals available for industrial use.
Yes. Iridium exhibits exceptional resistance to oxidation, acids, alkalis and molten oxides. It is considered one of the most corrosion-resistant engineering metals available.
Iridium maintains excellent mechanical strength and chemical stability at extremely high temperatures while resisting attack from molten oxide materials. This makes it the preferred material for sapphire, YAG and other oxide crystal growth processes.
Typical purity grades include 99.90%, 99.95% and 99.99%. Ultra-high purity iridium is commonly supplied for semiconductor manufacturing, crystal growth and scientific research.
We supply iridium crucibles, rods, wires, sheets, foils, tubes, sputtering targets, electrodes and precision-machined custom components manufactured according to customer drawings.
Yes. Although iridium is difficult to machine due to its high hardness and brittleness, advanced CNC machining, EDM, grinding and precision finishing technologies allow the production of complex custom parts.
Iridium has a significantly higher melting point, greater hardness and better wear resistance than platinum. Platinum offers superior ductility and is easier to fabricate, while iridium is preferred for extremely high-temperature applications.
Major industries include semiconductor manufacturing, sapphire crystal growth, optical materials, aerospace, scientific research, medical technology, electrochemical processing and high-temperature laboratory equipment.
Yes. Iridium can be joined using specialized welding methods such as electron beam welding, laser welding and TIG welding under carefully controlled conditions. Proper procedures are essential to maintain material integrity.
Yes. Custom manufacturing is available for dimensions, shapes, machining tolerances and fabricated assemblies based on customer drawings or technical specifications.
Material certification, chemical composition analysis, dimensional inspection reports and third-party inspection services such as SGS, BV or TÜV can be provided upon customer request.
Sunny Steel provides high-purity iridium products, precision machining capabilities, strict quality control, customized manufacturing solutions and worldwide export experience for demanding industrial applications.

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