Copper alloy balls include brass balls and copper balls used in applications requiring conductivity, corrosion resistance, stable metallic appearance and non-magnetic performance.
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Copper alloy balls provide corrosion resistance, electrical conductivity and non-magnetic performance for valve, conductive and decorative ball applications.
Copper alloy balls are manufactured from copper-based metallic materials including brass alloys and pure copper materials.
Compared with standard carbon steel balls, copper alloy balls provide better corrosion resistance, non-magnetic performance and electrical conductivity, making them suitable for valve balls, conductive balls and decorative ball applications.
Brass balls are commonly selected for valve, hardware and decorative ball applications, while copper balls are more suitable for conductive and thermal-transfer applications.
Due to their relatively lower hardness compared with bearing steel balls, copper alloy balls are generally not recommended for high-load rolling element bearing applications.
Selection between brass balls and copper balls should be based on conductivity requirements, mechanical strength, corrosion environment and operating conditions.
| Item | Specification |
| Material | Copper Alloy |
| Typical Materials | Brass / Pure Copper |
| Structure | Solid metal ball |
| Size Range | 1 mm – 100 mm |
| Grade | Depending on ball application requirements |
| Density | Approx. 8.4 – 8.9 g/cm³ |
| Corrosion Resistance | Good in atmospheric, freshwater and seawater environments; not suitable for strong acids, ammonia or sulfide media |
| Electrical Conductivity | Moderate to excellent depending on alloy type |
| Magnetic Properties | Non-magnetic |
| Temperature Recommendation | Suitable for low-to-moderate temperature applications; continuous service above 250°C is generally not recommended |
| Design Note | Softer than bearing steel balls; not suitable for high-load or high-wear rolling applications |
| Surface Appearance | Metallic yellow or copper color |
| Packing | Carton / Plastic bag / Steel drum / Custom |
| Condition | Clean and dry or lightly oiled |
| Delivery Time | Stock available for standard sizes or production based |
| Ball Type | Main Features | Typical Hardness | Conductivity | Typical Ball Applications |
| Brass Balls | Good corrosion resistance and stable metallic appearance | ~70–110 HV (softer than bearing steel) | ~28% IACS | Valve balls, hardware balls, decorative balls |
| Copper Balls | Excellent electrical and thermal conductivity | ~40–60 HV (very soft) | ~100% IACS | Conductive balls, electrical contact balls, thermal-transfer applications |
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Address: No.202,Yangjia tou, Nanzhai, Xueyan town, Wujin, Changzhou, China 213178, Changzhou, Jiangsu
Contact: Nicky Yang
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Email: nicky@stw-industrial.com
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