How to distinguish the quality of copper braided wire

How to distinguish the quality of copper braided wire--Zhejiang intends to buy copper braided wire in large quantities, but does not know how to distinguish the quality from the bad.

The copper industry distinguishes copper braided wires from the following points:

1. Look at the material. Manufacturers provide raw material testing reports.

2. Measure resistance. If the resistance is less than 0.01777, it is pure copper of T2 or above, otherwise it is mixed with other materials.

3. Read the report. -Generally, regular manufacturers will provide factory inspection reports when they leave the factory.

4. Look at the appearance. Smooth surface, no broken strands, burrs, missing weaving, no redness and blackening.

5. Weigh the weight. A heavy product is better than a light one.

6. The copper content of T2 copper braided wire is above 99.95%, which can only be dissolved at high temperature above 1080 degrees, and high temperature annealing is also required.

It takes about 500 degrees to be softened, and the section is still copper. The copper content of other materials is only about 60%, and the temperature resistance is only that of pure copper.

About 86%, the lighter will explode in the middle when it is burned, and the section is brass-colored.