Forging-Grade Copper Alloy Billet

Forging-grade copper alloy billet is a semi-finished industrial material specifically formulated for hot forging processes. It provides excellent forgeability, thermal conductivity, and corrosion resistance when shaped under high pressure and temperature. This material is engineered to maintain structural integrity during deformation while minimizing defects like cracking or porosity. It serves as the foundational raw material for producing complex forged components across multiple industries.

The billet is supplied in cylindrical or rectangular cross-sections with a nominal diameter tolerance of ±0.5 mm and lengths ranging from 500 to 6000 mm. The alloy composition is near pure copper, with a minimum copper content of 99.90% per ASTM B124, and may include zinc, tin, and nickel as alloying elements. Typical physical properties include a density of 8.9–8.94 g/cm³, thermal conductivity of 385–400 W/m·K at 20°C, and electrical conductivity of at least 100% IACS. Mechanical properties in the as-forged condition include a minimum yield strength of 200 MPa and a Brinell hardness of 35–60 HB. The microstructure exhibits an average grain size of 0.015–0.045 mm, and surface quality limits maximum defect depth to 0.2 mm. Straightness is maintained within 1.5 mm/m for automated forging lines.

This material is intended for hot forging operations within a temperature range of 750–950°C. It is suitable for producing components that require high thermal and electrical conductivity, such as electrical connectors, heat sinks, and corrosion-resistant fittings. The billet is not a finished part; it requires subsequent machining or forming. Buyers must verify that the specific alloy grade, dimensions, and mechanical properties meet their application requirements. All listed standards (ASTM B124, GB/T 1804, ASTM E112, ASTM E1004, ASTM E10, GB/T 14956) are reference points for procurement and verification; they do not imply certification of any particular product. Always confirm model-specific values and compliance with the legal manufacturer or supplier before use.

The billet is heated to a forging temperature between 750°C and 950°C, which reduces yield strength and increases ductility. It is then placed in a die and subjected to compressive forces, typically from a hammer or press. The material flows plastically to fill the die cavity, achieving the desired shape and grain structure. Controlled deformation and cooling minimize internal defects such as porosity or cracking. The process enhances mechanical properties through work hardening and recrystallization, resulting in a component with improved strength and reliability.