C92200. also known as Navy M bronze, is a copper alloy belonging to the leaded gunmetal family. It offers a
good combination of strength, wear resistance, and machinability, making it suitable for various industrial
applications. However, similar to other leaded alloys, its use is decreasing due to environmental and health
concerns.
Table: Key Properties of C92200
| Property |
Description |
| Chemical Composition |
- Primarily Copper (Cu): 88% <br> - Tin (Sn): 6% <br> - Lead (Pb): 2% <br> -
Zinc (Zn): 4% <br> - Other (Fe, etc.): Trace amounts
|
| Mechanical Properties |
- Good tensile and yield strength <br> - Good wear resistance <br> - Excellent
machinability due to lead content <br> - Fair corrosion resistance
|
| Common Brands (By Country) |
- Europe: ASTM B271. B61. B584 [Europe] <br> - US: Navy M Bronze, SAE
622
|
Common Questions and Answers:
What are the typical applications of C92200?
C92200 finds use in various industries due to its balanced properties:
Gears: Its strength and wear resistance make it suitable for gears, particularly for
lower-load applications.
Bearings and bushings: C92200 can be used for bearings and bushings in applications with
moderate loads.
Wear plates and liners: Industrial machinery can benefit from C92200's wear resistance
for wear plates and liners.
Steam and hydraulic applications: C92200 can be found in some steam and hydraulic
applications due to its decent pressure tightness.
What are the drawbacks of using C92200?
The main limitations of C92200 are:
Lead content: Lead is a health hazard during machining and limits applications in some
industries due to environmental regulations.
Fair corrosion resistance: C92300 is not ideal for environments with high corrosion
potential.
Are there lead-free alternatives to C92200?
Lead-free alternatives can be considered depending on the specific application requirements. Here are some
options:
C93700: A high-tin bronze with good machinability and wear resistance for bearings and
bushings, but no lead.
Aluminum bronzes (e.g., C95400): Offer good strength, wear resistance, and machinability
without lead.
Leaded Nickel-Tin bronzes (e.g., C92900): Depending on the specific needs, some leaded
Nickel-Tin bronzes might offer a balance of properties with slightly lower lead content compared to C92200.
Important Note: Regulations on lead usage can influence the availability of C92200. Lead
content should also be a factor when choosing a material. 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.
