Topics CoveredIntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Forging Hot Working Cold Working AnnealingApplications
Copper can be formed into alloys more easily than most metals. It can also be combined with a wide range of alloying elements. Copper possesses excellent electrical and thermal conductivity of any commercial metal. There are 400 types of copper alloys with each comprising many properties that are suitable for various applications, manufacturing processes, and environments.
UNS C44500 alloys are a type of brass-copper alloys with medium leaded property. It is also known as naval brass. These alloys have good corrosion resistance and hot forgeability, and free-cutting features. The following datasheet will provide details about UNS C48200 medium leaded brass-copper alloys
The following table shows the chemical composition of the UNS C48200 medium leaded brass-copper alloys.
The physical properties of UNS C48200 medium leaded brass-copper alloys are outlined in the following table.
The mechanical properties the UNS C48200 medium leaded brass-copper alloys are tabulated below.
|Yield strength (depending on temper)
|Elongation at break (in 381 mm)
|Machinability (UNS C36000 (free-cutting brass) = 100)
The thermal properties of the UNS C48200 medium leaded brass-copper alloys are tabulated below.
|Thermal expansion co-efficient (20-300°C/68-572°F)
||805 BTU in/hr.ft².°F|
Equivalent materials to UNS C48200 medium leaded brass-copper alloys are:
- ASTM B124
- ASTM B21
- ASTM B283
- QQ B639
Fabrication and Heat Treatment
The machinability rate of UNS C48200 medium leaded brass-copper alloys are 50.
Soldering, brazing, and butt welding are considered as suitable welding processes, whereas processes such as oxyacetylene welding, gas shielded arc welding, coated metal arc welding, spot welding, seam welding are not recommended for UNS C48200 alloys.
UNS C48200 alloys have a hot forgeability rating of 90 with the recommended hot working temperature being between 649 and 760°C (1200 and 1400°F).
The hot working capacity of UNS C48200 alloys is good.
The cold working capacity of UNS C48200 alloys is poor.
The annealing temperature of UNS C48200 alloys is between and 427 and 593°C (800 and 1100°F).
UNS C48200 medium leaded brass-copper alloys are used in fasteners, hardware requiring corrosion resistant service, and marine applications. It is also used for high strength cold headed products.