How to buy high-quality welding wire?

How to buy high-quality welding wire?

1) Look at the label.

The content of the wire qualification certificate produced by regular manufacturers should include: 3C certification mark, certification number, model specification, implementation standard, rated voltage, wire length, production date, manufacturer, inspector, factory name, factory address, fixed telephone, and anti-counterfeiting signs.  The labels of counterfeit products are often unclear or incomplete.

2) Look at the surface.

The plastic sheath of the national standard wire is soft and smooth, and the color is uniform. On its surface, several items on the product certificate should also be printed, such as: 3C certification mark, certification number, model, rated voltage, implementation standard, factory name, etc. At the same time, the handwriting must be clear and not easy to erase.
 

3) Try bending.

It is advisable to take a wire end and bend it repeatedly by hand. Those with soft hand feel, good fatigue resistance, plastic or rubber feel elastic and no cracks on the wire insulator are superior products. The insulation layer of fake and inferior wires seems to be very thick, but in fact, most of them are made of recycled plastic. As long as you squeeze a little harder, the squeezed place will become white, and the wire will break after 4 to 6 times of bending;

4) Tear off the insulation.

High-quality insulating materials have certain mechanical strength and flexibility, and they cannot be easily torn apart. The inferior wire can be torn off or pinched off by hand;

5) Watch burn.

According to the regulations, the insulation layer of the wire has a certain flame retardancy. Peel off a section of the insulation layer and ignite it with a lighter. It is the inferior wire that can continue to spontaneously ignite after leaving the open flame.
 

6) Check the thickness.

Cut a section of the insulating layer to see if there are visible pores on the section of the insulating layer, and whether the core is located in the middle of the insulating layer. What is not centered is the eccentric phenomenon caused by the low craftsmanship, and the presence of pores indicates that the insulating material used is unqualified. Serious eccentricity is most likely to leak electricity on the thinner side, and the presence of pores also affects the compressive strength.
According to the above 8 simple verification methods, it can basically identify whether it is a good or bad wire. If you need to speak with data, please use the corresponding instrument to detect the length, diameter, thickness, resistance, withstand voltage and strength of the wire.