What kinds of copper are there? What are the characteristics of each?

Classification of copper knowledge

1. Pure copper: commonly known as ‘red copper’ in China and ‘red copper’ in Japan and Taiwan

a.Common grades: T1, T2, T3, TU1, TU2 

b. Features: For conductivity

c. Common uses: electrical switches, motor coils, electronic parts, air-conditioning pipelines, soft welding gun heads

2. Brass: containing zinc

a. Common grades: H59, H62, H65, H68, HPb59-1 (free-cutting brass)

b. Features: high strength, wear resistance, water vapor corrosion resistance

c. Common uses: construction hardware, heat exchanger tubes, pumps, power cylinders and bushings, military supplies

3. Cupronickel: Nickel

a. Common grades: B19, B25, BFe10-1-1, BZn15-20, BA13-3 

b. Features: stable physical properties at room temperature

c. Common uses: medical appliances, precision instruments, thermocouples, watch parts, spectacle frames

4. Bronze:

Definition: Old name: tin bronze, such as ancient bells, tripods, and wine vessels.

New definition:

a collective name other than the three categories of purple, yellow, and cupronickel

b.Name: Chrome Bronze: QCr 0.5, QCr 0.6-0.4-0.05 

Tin Bronze: QSn 4-3, QSn 6.5-0.4, QSn 7-0.2 

Aluminum Bronze: QAl 5, QAl 9-2, QAl 10-4-4 

Bronze : QSi 3-1, QSi 3.5-3-1.5 

Manganese bronze: QMn 1.5, QMn 5 

Cadmium bronze: QCd 1, etc.

c.According to practical physical and chemical indicators, such as engineering comprehensive index of hardness, strength, elasticity, high temperature resistance, electrical conductivity, thermal conductivity, etc., there are different formulations.

d.Uses: Example: tin-phosphorus bronze: good elasticity, used for lamp springs, switch springs. Resistance welding electrode materials (roll welding machine, butt welding machine, butt welding machine, riveting machine) chromium zirconium copper, beryllium cobalt copper.The scope of application is extremely wide and extremely mixed.