1. Different strength:

T1 pure copper mechanical properties tensile strength: σb (MPa) ≥295;

T2 copper tensile strength σb (Mpa): ≥195;

T3 copper tensile strength σb (MPa): ≥210;

The tensile strength of T4 copper is lower.

2. The scope of application is different:

T1 pure copper has good electrical conductivity, thermal conductivity, corrosion resistance and processing performance, and can be welded and fiber welded;

T2 pure copper is used as electrical, thermal and corrosion resistant equipment. Such as wire, cable, conductive screw, detonator for blasting, evaporator for chemical industry, storage and various pipelines.

T3 pure copper contains more impurities that reduce electrical conductivity and thermal conductivity. The oxygen content is higher than T2, which is more likely to cause "hydrogen disease".

T4 pure copper is used in the production of motor short-circuit rings, electromagnetic heating inductors, and high-power electronic components, terminal blocks and the like.

Trace impurities in red copper have a serious impact on the electrical and thermal conductivity of copper. Among them, titanium, phosphorus, iron, silicon, etc. reduce the conductivity, while cadmium, zinc, etc. have little effect. Oxygen, sulfur, selenium, tellurium, etc. have very low solid solubility in copper, and can form brittle compounds with copper, which has little effect on conductivity, but can reduce processing plasticity.