What Is T3 Copper?
Standard GB/T 4423-1992
Material name: pure copper drawn rod (hard, 60～80mm)
Features: good electrical and thermal conductivity
Basic Information:
T3, copper T3, T3 material, T3 wire, T3 tube, T3 copper strip, T3 copper, T3 copper, T3 material, T1 T2 T3
Grade: T3
Characteristics, scope of application
It has good electrical conductivity, thermal conductivity, corrosion resistance and processing properties, and can be welded and brazed. However, it contains more impurities that reduce electrical conductivity and thermal conductivity, and has a higher oxygen content than T2, which is more likely to cause “hydrogen disease”. It cannot be processed (annealed, welded, etc.) and used in a reducing atmosphere at high temperatures (such as >370°C).
chemical composition
Copper + silver CuAg: ≥99.70
Tin Sn: ≤0.05
Lead Pb: ≤0.01
Nickel Ni: ≤0.2
Iron Fe: ≤0.05
Antimony Sb: ≤0.005
Sulfur S: ≤0.01
Arsenic As ：≤0.01
Bismuth Bi: ≤0.002
Oxygen O: ≤0.1
Note: ≤0.3 (impurities)
Mechanical properties
Tensile strength σb (MPa): ≥210
Elongation δ10 (%): ≥13
Elongation δ5 (%): ≥16
Note: Longitudinal room temperature tensile mechanical properties of bars
Sample size:
diameter or distance between opposite sides>60～80
Heat treatment specification
The hot working temperature is 900～1050℃; the annealing temperature is 500～700℃; the recrystallization starting temperature of cold work hardened copper is 200～300℃.
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