C93700 is a copper alloy belonging to the high-tin bronze family, but unlike its high-lead cousins, it
boasts a lead-free composition. This makes C93700 a popular choice for various applications requiring good
machinability, wear resistance, and corrosion resistance.
Table: Key Properties of C93700
| Property |
Description |
| Chemical Composition |
- Primarily Copper (Cu): Balance <br> - Tin (Sn): 7-9% <br> - Nickel (Ni): Up to
0.5% <br> - Other (Fe, Zn, etc.): Trace amounts
|
| Mechanical Properties |
- Excellent machinability <br> - Good wear resistance for bearings and bushings <br>
- Moderate strength and fair to good corrosion resistance
|
| Common Brands (By Country) |
- Europe: CuSn8Pb0 [Europe], CW608N [Europe] <br> - US: High-Leaded Tin
Bronze (SAE 64)
|
Important Note: The "High-Leaded Tin Bronze" designation in the US brand for
C93700 is a historical reference and can be misleading. C93700 actually contains no lead.
Common Questions and Answers:
What are the primary applications of C93700?
C93700's combination of properties makes it a go-to choice for various applications, including:
Bearings and bushings: The excellent machinability and good wear resistance of C93700 make
it ideal for bearings and bushings in applications with moderate loads.
Gears: Low-load gears can benefit from C93700's machinability and wear resistance.
Pump components: Impellers, shafts, and other pump components can be made from C93700 due
to its machinability and corrosion resistance.
How does C93700 compare to other high-tin bronzes?
Unlike some high-tin bronzes with higher lead content (e.g., C93800), C93700 offers the advantage of being
lead-free, making it a safer and more environmentally friendly option. It might have slightly lower
machinability compared to high-lead alternatives, but it compensates with good overall properties.
Is C93700 weldable?
Welding C93700 is possible but requires specific techniques to prevent cracking. Preheating and post-weld
heat treatment are often recommended. Consulting a welding professional is essential for optimal results.
