Leaded tin bronze
High leaded tin bronze alloys contain 7 to 15 percent lead, which enhances their machinability, thermal conductivity, and lubricity. Alloy C93200, known as bearing bronze or SAE 660, serves as the primary alloy in this group and is extensively utilized in bearing applications.
VIIPLUS C9320 leaded Bronze Bearings
Leaded tin bronzes are a group of alloys valued for their machinability, self-lubricating properties, and wear resistance, making them ideal for use in bushings and bearings. Lead content typically ranges from 7% to 15%, and it enhances thermal conductivity, lubricity, and free-cutting properties.
C93200 Bronze (SAE 660)
C93200, or SAE 660, is a widely used leaded tin bronze alloy in bearing applications.
Properties:
- Wear Resistance: C93200 offers excellent wear resistance, even under heavy loads, abrasion, and friction. The lead content forms a lubricating film, reducing friction and wear.
- Self-Lubricating: The lead helps the alloy self-lubricate, minimizing the need for external lubrication and enhancing component lifespan, particularly in challenging lubrication environments.
- Machinability: With a lead content of 6-8%, C93200 boasts a machinability rating of 70, facilitating efficient machining processes.
- Mechanical Properties: It has a tensile strength of 35,000 PSI (241 MPa), yield strength of 20,000 PSI (138 MPa), a minimum elongation of 10%, and a Brinell hardness of 65.
Applications: C93200 is used in automotive fittings, industrial machinery bushings, valve and pump components, and electric motor bushings.
Other High-Leaded Tin Bronzes:
- C93600: 7%-30% lead, suited for bearing applications with potential lubrication loss.
- C93700: High strength, excellent wear resistance under high pressure and speeds, used with hardened steel shafts.
- C93900: Non-seizing, corrosion-resistant in seawater and sulfuric acid, with fair strength.
C93200 Leaded Tin Bronze Bearing Bushing
C93200 Leaded Tin Bronze, also known as bearing bronze, offers excellent machinability, hardness, strength, and wear resistance.
Our C932 Bronze | C93200 (SAE 660) High Lead Tin Bearing Bronze Rounds are a versatile bearing alloy with excellent anti-friction properties, sufficient strength and hardness, and reasonable ductility.
When selecting alloys for oversized bronze bearings, a variety of copper-based alloys, including leaded bronzes, aluminum bronzes, special bronzes, brass and bronze are available. Adjusting alloying elements allows manufacturers to tailor the physical and mechanical properties to meet different application needs, which ensures that the bearings precisely match their intended use.
Operating conditions often have conflicting demands, making almost every bearing design a compromise8. Extremes of load, speed, or temperature can be especially challenging when combined8. The bearing designer’s job is to optimize the compromise to bring out the highest possible performance in the finished bearing.
