CompositionPhysical PropertiesMechanical PropertiesThermal propertiesOther DesignationsFabrication and Heat
Treatment Machinability Welding
Leaded yellow brass – copper casting alloy UNS C85400 has high machinability
due to the presence of lead in the alloy. Lead works as a lubricant and
microscopic chip breaker. UNS C85400 has good strength and resistance to
corrosion. UNS C85400 copper alloy is an alloy of copper, zinc and lead which belongs to the cast alloys category.
The following datasheet provides chemical composition and properties
of UNS C85400.
The chemical composition of UNS C85400 copper alloy is given in the
The following table details the physical properties of UNS C85400.
The mechanical properties of UNS C85400 copper alloy are shown in the
|Elongation at break
The following table discusses the thermal properties of UNS C85400.
|Thermal expansion co-efficient
|Thermal conductivity (@20°C/68°F)
Equivalent designations to UNS C85400 copper alloy include:
- ASTM B271
- ASTM B30
- ASTM B584
- ASTM B763
- QQ C390
- SAE J461
- SAE J462
Fabrication and Heat Treatment
UNS C85400 has a machinability rating of 80.
The preferred welding techniques for UNS C85400 copper alloy are
soldering, brazing and oxyacetylene welding. Gas shielded arc welding, coated
metal arc welding and carbon arc welding are not recommended for this alloy.