C93800 is a copper alloy categorized as a high-leaded tin bronze. It's known for its excellent
machinability, good wear resistance, and fair corrosion resistance. However, similar to other high-lead
alloys, its applications are limited due to environmental and health concerns.
Table: Key Properties of C93800
| Property |
Description |
| Chemical Composition |
- Primarily Copper (Cu): 75-79% <br> - Tin (Sn): 6.3-7.5% <br> - Lead (Pb): 13-16%
<br> - Other (Fe, Zn, etc.): Trace amounts
|
| Mechanical Properties |
- Good machinability due to high lead content <br> - Good wear resistance for low to
medium loads <br> - Moderate strength and fair corrosion resistance
|
| Common Brands (By Country) |
- Europe: B505 High-Leaded Tin Bronze [Europe] <br> - US: High-Leaded
Tin Bronze (SAE 67)
|
Common Questions and Answers:
What are the typical applications of C93800?
Similar to other high-lead copper alloys, the use of C93800 is decreasing due to lead content. However, some
traditional applications include:
Bearings and bushings: In applications with low to medium loads, C93800's machinability
and wear resistance make it suitable for bearings and bushings.
Gears: C93800 can be used for low-load gears that require good machinability.
Important Note: Regulations on lead usage can make finding readily available C93800 or its
equivalents challenging. Explore alternative copper alloys with lower lead content for most applications.
What are the drawbacks of using C93800?
The main drawbacks of C93800 are:
High lead content: Lead is a health hazard during machining and limits applications due to
environmental regulations.
Moderate strength: Compared to other copper alloys, C93800 offers moderate strength, making
it unsuitable for demanding applications.
Fair corrosion resistance: C93800 is not ideal for environments with high corrosion
potential.
Are there lead-free alternatives to C93800?
Several lead-free copper alloys offer better overall properties. Depending on the specific application
requirements, some options include:
C93700: A lead-free alternative with good machinability and wear resistance for bearings and bushings.
Aluminum bronzes (e.g., C95400): Offer good strength, wear resistance, and machinability without lead.
Important Note: Always consult with a material engineer or supplier to identify the most
suitable copper alloy for your specific application considering factors like strength, wear resistance,
corrosion resistance, and regulatory compliance.
