Production of copper rounds, bars

Calculation of the weight of copper rounds and bars

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Production of copper rolled products

Production of copper bars and circles is regulated by requirements of GOST 1535-2006. This standard specifies production of copper bars of two categories - of higher purity (grades M1 and M2), as well as of secondary copper grade M3. The chemical composition of the feed material is specified in GOST 859-2001, and methods for determining the basic mechanical properties of copper - GOST 24251-80.

Drawing and pressing

Drawing can be performed in cold or hot condition. Preformed semi-finished product is set in the drawing mill die, where it is gripped and forced through forming rollers. Due to the high ductility of copper the process is usually completed in one or two passes. However, tensile stresses arising in the process of broaching may cause discontinuities and cracks, therefore, this technology is used in production of copper semi-finished products with cross-section not more than 10...12 mm.

Drawed and pressed copper rod/circle, GOST 1535-91

Drawed rod and round Tensile strength Elongation, %
Soft 200...210 MPa 35...45
Semi-solid 240...250 MPa 10...17
Solid 270...290 MPa 5...8
Pressed 90...200 MPa 30...35

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Hot pressing

Hot-pressing of rolled copper provides a much higher quality surface of a circle or bar. The process is carried out on horizontal hydraulic presses by direct extrusion of the input material, which is preheated in a furnace to temperatures of 450...5000 C. The method is suitable for the production of copper billets with a diameter of 10 to 160 mm, has a higher quality of surface, but also much higher technological efforts.

To buy. Supplier, price

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