C22000 is a copper-zinc alloy (brass) composed of 90% copper (Cu) and 10% zinc (Zn) . It is classified under the Unified Numbering System (UNS) as C22000, with equivalent designations including EN CuZn10 and DIN CW501L . This alloy is widely used in architectural applications (e.g., railings, balusters) and industrial components due to its excellent formability, corrosion resistance, and aesthetic appeal . It is also recognized for its lead-free, eco-friendly properties and suitability for precision machining

C84400 is a leaded semi-red brass copper alloy primarily composed of copper (Cu: 79.0–82.0%), zinc (Zn: 7.0–10.0%), lead (Pb: 6.3–7.7%), and tin (Sn: 2.9–3.5%), with trace amounts of iron, nickel, antimony, and other elements

C21000 is a high-conductivity brass alloy composed primarily of copper (94–96%) with zinc as the balancing element, along with trace amounts of iron (≤0.05%) and lead (≤0.05%) . It is classified as a 95% copper brass (CuZn5) and is notable for its excellent thermal and electrical conductivity, corrosion resistance (especially in marine environments), and non-magnetic properties . The alloy also exhibits good cold and hot workability, making it suitable for applications like heat exchangers, marine hardware, electrical components, and condenser tubes .

C24000 copper tube is a common brass tube, mainly composed of copper (Cu) and zinc (Zn), belonging to copper-zinc alloy (CuZn20). Its chemical composition contains 78.5%-81.5% copper, zinc as the balance, and contains trace elements such as lead (Pb≤0.05%) and iron (Fe≤0.05%). This material has high strength, good plasticity, corrosion resistance and hot and cold processing properties, and is suitable for manufacturing thin-walled tubes, corrugated tubes, papermaking nets and building supplies.

C35330 is a dezincification-resistant (DZR) brass alloy primarily composed of copper, zinc, lead, and trace arsenic. It is designed to withstand corrosive environments, particularly chlorinated water systems, while maintaining excellent machinability and cold-forming properties. The alloy’s alpha-phase structure, combined with heat treatment, ensures resistance to dezincification—a common failure mode in high-zinc brasses exposed to aggressive fluids. Typical applications include plumbing hardware, valve components, and fittings in potable water systems .

C44300 copper tube is a copper-zinc-tin alloy (naval brass or arsenic brass) with excellent corrosion resistance, thermal conductivity and mechanical properties. It is widely used in heat exchangers, condensers, ship pipelines, oil and gas equipment and other industrial fields.

C23000 copper tube is a kind of red brass (copper-zinc alloy), with copper content of 84.0%-86.0% and zinc content of no more than 15%. It has excellent corrosion resistance (anti-desinication, pitting), hot and cold processing performance and weldability. Its typical applications include pipe connectors, condensers, heat exchangers, underground water pipes and building guardrails.

C26000 copper tube is a 70/30 copper-zinc alloy (brass) with good plasticity, strength, machinability, welding and corrosion resistance. It is widely used in heat exchangers, papermaking equipment, mechanical parts, building water supply systems and other fields. The "C26000" in its name is the American ASTM standard grade, and the corresponding Japanese JIS standard grade is C2600.

C26800 is a common brass (Cu-Zn alloy), with a copper content of 64%-68.5%, zinc as the balance, and a small amount of iron (≤0.05%), lead (≤0.15%) and other elements. Its zinc content is about 34%, which is a high-zinc brass with good cold working properties, but it should be noted that stress corrosion cracking may occur in an environment containing ammonia, mercury or acid.

C27400 is a brass alloy copper tube, mainly composed of copper (Cu) and zinc (Zn), with a zinc content of about 37%. This material has good corrosion resistance, high strength and processing performance, and is widely used in water heaters, pipeline systems, heat exchangers, electrical equipment and other fields. Its chemical composition is copper as the balance, zinc content is about 37%, and other impurity elements such as tin (Sn) are extremely low (such as Sn <0.05%).

C36000 copper tube is a kind of American standard lead brass material, which belongs to free-cutting brass alloy and has excellent machining performance and anti-friction characteristics. Its chemical composition is based on zinc, containing lead (Pb) 0.8%-4%, aluminum (Al) ≤0.5%, iron (Fe) ≤0.10%, and density is 9.6g/cm³. It is widely used in precision machinery fields such as watch parts, automobile parts and riveted parts.