Topics CoveredIntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Cold Working Welding Forging Machinability Hot WorkingApplications
Copper alloys are available in more than 400 varieties. Each copper alloy variety has specific properties that suit a number of manufacturing processes, environments and applications. Some of the copper alloy forms include:
- Beryllium copper
- Nickel silver
- Tin bronze
- Phosphor bronze
- Aluminum bronze
UNS C18400 chromium copper alloys features moderately high elevated strength and conductivity 80% IACS. The datasheet below provides an overview of UNS C18400 chromium copper alloys.
The chemical composition of UNS C18400 chromium copper alloys is outlined in the following table.
The following table shows the physical properties of UNS C18400 chromium copper alloys.
The mechanical properties of UNS C18400 chromium copper alloys are displayed in the following table.
|Yield strength (depending on temper)
|Elongation at break (in 127 mm (2in.))
|Machinability (UNS C36000 (free-cutting brass) = 100)
The thermal properties of UNS C18400 chromium copper alloys are given in the following table.
|Thermal expansion co-efficient (@20-100°C/68-212°F)
|Thermal conductivity (@20°C/68°F)
||1190 BTU in/hr.ft².°F|
Equivalent materials to UNS C18400 chromium copper alloys are:
- MIL C-19311
- SAE J461
- SAE J463
Fabrication and Heat Treatment
UNS C18400 alloys can be cold worked in an excellent manner.
UNS C18400 alloys can be welded using brazing, gas shielded arc welding, butt welding and soldering processes. Welding processes not recommended for these alloys include seam welding, oxyacetylene welding, spot welding and coated metal arc welding.
UNS C18400 alloys can be hot worked between 760 and 871°C (1400 and 1600°F). The hot forgeability rating of these alloys is 80.
The machinability rating of UNS C18400 alloys is 20.
UNS C18400 alloys have good hot forming capacity.
UNS C18400 alloys are also used in mechanical and electrical power transmission devices, high-strength fasteners for elevated-temperature service and circuit breaker parts. They are also used in welding equipment components that include wheels, tips and clamps.