1. Pure copper: commonly known as “purple copper” in China
a. Common grades: T1, T2, T3, TU1, TU2
b.Characteristics: for conductive purposes
c. Common uses: electrical switches, motor coils, electronic parts, air conditioning pipelines, soldering gun heads
2. Brass: Contains zinc
a. Common grades: H59, H62, H65, H68, HPb59-1 (free cutting brass)
b. Characteristics: high strength, wear resistance, water vapor corrosion resistance
c. Common uses: building hardware, heat exchanger tubes, pumps, power cylinders and bushings, military supplies
3. White copper: containing nickel
a. Common grades: B19, B25, BFe10-1-1, BZn15-20, BA13-3
b. Characteristics: Stable physical properties at room temperature
c. Common uses: medical equipment, precision instruments, thermocouples, watch parts, spectacle frames
4. Bronze:
a. Definition: Japanese name: tin bronze, such as ancient bells, tripods, and wine vessels
New definition: general name other than purple, yellow, and white copper
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, QAl9-2, QAI 10-4-4
Bronze: QSi 3-1, QSi 3.5-3-1.5
Manganese bronze: QMn 1.5, QMn 5
Pot bronze: QCd1 etc.
c. There are different formulas based on practical physical and chemical indicators, such as hardness, strength, elasticity, high temperature resistance, electrical conductivity, thermal conductivity, etc.
d.Usage:
Example: Tin-phosphorus bronze: good elasticity, used as lamp springs and switch springs
