C21000 is a brass alloy (copper-zinc alloy) with a copper content of 94–96%, zinc as the primary alloying element, and trace amounts of iron (≤0.05%) and lead (≤0.05%)

C27400 copper wire is a brass alloy, the main components of which are copper (Cu) and zinc (Zn), with a chemical composition ratio of Cu 57-60% and Zn 38-42%. This material belongs to low-phosphorus brass, has good electrical conductivity, corrosion resistance and mechanical properties, and is suitable for a variety of industrial uses, such as electrical connections, mechanical parts and decorations.

C26800 copper wire is a copper-zinc alloy (brass) with a zinc content of about 33%. It has good processing properties, mechanical strength and conductivity and is widely used in electronic components, fasteners, decorations and other fields.

C26000 copper wire is a 70/30 copper-zinc alloy (copper content 68.5%-71.5%, zinc balance), which belongs to the category of ordinary brass (H70). It has excellent plasticity, high strength, good machinability and corrosion resistance. It is suitable for electronic parts, heat exchangers, mechanical parts and other fields.

C46400 copper wire is a kind of tin brass (naval brass), which has excellent corrosion resistance (especially in seawater environment), good hot working performance and mechanical strength. It is widely used in shipbuilding, aviation, fasteners and marine engineering.

C36000 copper wire is an American standard lead brass material, a free-cutting brass alloy with excellent processing performance and mechanical strength.