1. What material is C36000 Copper?
2. What is the chemical composition of C36000 Copper?
Copper (Cu): 60.0–63.0% (base element, providing basic mechanical and conductive properties)
Zinc (Zn): Balance (typically 35.0–38.0%, enhancing strength and machinability)
Lead (Pb): 2.5–3.7% (critical free-cutting additive, improving chip formation and tool life)
Iron (Fe): ≤ 0.35% (controlled to avoid hard spots and maintain machinability)
Nickel (Ni): ≤ 0.50% (trace impurity, minimal impact on performance)
Tin (Sn): ≤ 0.30% (trace element, slightly enhancing corrosion resistance)
Other Impurities: Total ≤ 0.50% (e.g., aluminum, antimony, phosphorus-strictly limited to prevent performance degradation)
3. What is the hardness of C36000 Copper?
3.1 Annealed State (Soft State)
Brinell Hardness (HB): 60–80 HB (500 kg load, 10 mm ball)
Rockwell Hardness (HRB): 50–65 HRB
Vickers Hardness (HV): 65–90 HV
This state has excellent ductility and is suitable for forming processes (e.g., bending, drawing) before final machining.
3.2 Cold-Worked State (Half-Hard to Full-Hard)
Half-Hard State: Brinell Hardness 90–110 HB; Rockwell Hardness 70–80 HRB
Full-Hard State: Brinell Hardness 110–130 HB; Rockwell Hardness 80–90 HRB
Cold working increases hardness and strength while reducing ductility, making this state suitable for finished parts requiring higher wear resistance.
3.3 As-Cast State
Brinell Hardness (HB): 70–90 HB
Slightly harder than the annealed state but with lower uniformity, mainly used for cast components before machining.
