High Leaded Tin Bronze


High Leaded Tin Bronze


  • C93200


  • Lead is added to improve machinability and pressure tightness
  • Suitable for pump, valve components, general utility bearings, bushings


High leaded tin bronze C93200, also known as SAE 660 bronze, is a specific type of tin bronze alloy known for its excellent wear resistance, self-lubricating properties, and machinability. Composed primarily of copper (Cu) with tin (Sn) as the primary alloying element and a high lead content, C93200 offers a unique set of characteristics that make it highly valuable in various industrial applications. Here's a detailed write-up on high leaded tin bronze C93200:


High leaded tin bronze C93200 typically consists of copper as the base metal, with tin and lead added as alloying elements. The exact composition of C93200 alloy includes approximately:

  • Copper (Cu): 81-85%
  • Tin (Sn): 6-8%
  • Lead (Pb): 6-8%
  • Other trace elements: Zinc (Zn), Iron (Fe), and Phosphorus (P) in small amounts.

The precise composition may vary slightly depending on specific manufacturing requirements and standards.


  1. Excellent Wear Resistance: C93200 bronze exhibits exceptional wear resistance, making it suitable for applications subjected to heavy loads, friction, and abrasive wear. The high lead content contributes to the formation of a lubricating film on the surface, reducing friction and minimizing wear, even under high-speed and high-load conditions.
  2. Self-Lubricating Properties: The presence of lead in C93200 bronze imparts self-lubricating properties to the alloy. This reduces the need for external lubrication and enhances the performance and longevity of components, particularly in applications where continuous lubrication is impractical or challenging.
  3. Machinability: C93200 bronze is renowned for its excellent machinability, allowing for easy cutting, drilling, milling, and turning operations. Its machinability facilitates the production of intricate components with precise dimensions, contributing to manufacturing efficiency and cost-effectiveness.
  4. Good Corrosion Resistance: Despite the high lead content, C93200 bronze still offers good corrosion resistance, particularly in freshwater and non-corrosive environments. However, it may not be suitable for applications exposed to seawater or highly corrosive chemicals.
  5. High Thermal Conductivity: C93200 bronze possesses high thermal conductivity, allowing for efficient heat transfer and dissipation. This property is advantageous in heat exchangers, bearings, and other thermal management applications where effective heat dissipation is essential for optimal performance.
  6. Excellent Bearing Properties: Due to its wear resistance and self-lubricating properties, C93200 bronze is widely used in the manufacture of bearings, bushings, and thrust washers for various industrial applications. It provides reliable performance and extended service life in rotating and sliding applications.


  1. Bearings and Bushings: C93200 bronze is commonly used in the manufacture of bearings, bushings, and thrust washers for various industrial applications, including automotive, machinery, and heavy equipment. Its excellent wear resistance and self-lubricating properties make it ideal for high-load and high-speed applications.
  2. Wear Plates and Guides: C93200 bronze finds applications in wear plates, guides, and slide rails where low-friction, wear-resistant materials are required. Its self-lubricating properties reduce friction and minimize wear, resulting in improved performance and longevity of components.
  3. Pump and Valve Components: C93200 bronze is utilized in the manufacturing of pump and valve components such as impellers, sleeves, and valve seats due to its wear resistance and self-lubricating properties. It ensures reliable performance and extended service life in fluid handling applications.
  4. Gears and Gear Bushings: C93200 bronze is used in the production of gears and gear bushings for machinery and automotive applications. Its excellent wear resistance and self-lubricating properties contribute to smooth operation and reduced maintenance requirements.
  5. Marine Applications: While not suitable for direct exposure to seawater, C93200 bronze is used in marine applications for components requiring wear resistance and self-lubricating properties, such as propeller shaft bearings, stern tubes, and rudder bearings.


High leaded tin bronze C93200 is a versatile alloy with a wide range of applications across diverse industries. Its exceptional wear resistance, self-lubricating properties, and machinability make it indispensable for manufacturing critical components and structures requiring durability, reliability, and performance. Whether in bearings, pump components, gears, or marine applications, C93200 bronze continues to demonstrate its value as a versatile and effective engineering material.

  • Round Bar / Rod
  • Flat Bar
  • Bush / Hollow
  • Sheet / Plate
  • Cu: 81-85%
  • Sn: 6.5-7.5%
  • Pb: 6-8%
  • Ni: 1% max


  • Tensile Strength: 240 MPa (34800 PSI)
  • Yield Strength: 125 MPa (18100 PSI)
  • Elongation: 20%
  • Elastic Modulus: 117 GPa (16969 KSI)
  • Hardness: 65
  • Fatigue Strength: 110 MPa (16000 KSI)
  • Machinability: 70


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