There are various methods for classifying flux-cored wire. Such as classification according to the manufacturing method of flux-cored wire. Classification of shielding gas when welding of flux-cored wire. Classification by the use of flux-cored wire.Classification of welding powder composition of flux-cored wire.
Today, we will introduce you to the flux-cored wire under various classification methods:

Classification by Manufacturer Method

According to different manufacturing methods, the flux-cored wire can be divided into two types:
a seamless flux cored wire and a seamless flux cored wire. The seamed flux-cored wire  processe into a groove by a thin aluminum strip through a forming roll. Which roll into a powder, rolled into a tube and then drawn, and processed. The seamless flux-cored wire  fill with pre-formed aluminum tubes and then drawn to the diameter of the wire product.

Compared with the seams, the seamless aluminum-based flux cored wire process more advanced.With the advantages of uniform solder powder, solder powder not easy to get wet, and better welding effect.

The flux-cored wire can divid into gas-shielded flux-cored wire and self-shielded flux-cored wire according to different shielding gas during welding. In China, Japan, South Korea, etc., most of the flux-cored wire uses CO2 as a shielding gas. While the proportion of self-shielded flux-cored wire in the United States  relatively high. In Europe, due to the difference in the price of protective gas, the flux-cored wire mainly uses mixed gas ( Ar-CO2) protection.

Classification by Application

Depending on the application, the flux-cored wire can be divided into:low carbon steel and 490MPa grade steel; high strength steel; heat resistant steel; low temperature steel; corrosion resistant steel; stainless steel and flux cored wire for hard surface surfacing. Because the flux-cored wire can adjust the internal core formula. Which used for the boiler. Heat-resistant steel flux-cored wire for pressure vessels, etc.

Classification by Composition

According to the composition of the filled powder, the flux cored wire can  divid into:
slag type flux cored wire and metal powder type flux cored wire.  The slag type flux cored wire can  classify into titanium type ; titanium calcium type ; and alkaline  flux cored wire.  According to the alkalinity of the slag. In general, the titanium-type flux-cored wire weld  well formed. And the welding operation at all positions  good. But the notch toughness and crack resistance are slightly poor. On the contrary, the basic flux-cored wire has good notch toughness and crack resistance. And the appearance, molding and workability of the weld are poor. The titanium calcium type flux cored wire  somewhere in between.

In recent years, with the development of flux-cored wire.The new type of titanium-type flux-cored wire not only has good welding process. But also has low diffusion hydrogen content and excellent impact toughness.While titanium-calcium type flux-cored wire  rarely use.  The metal powder type flux cored wire has the characteristics of low slag of the solid wire, good crack resistance; good welding performance of the titanium type flux cored wire. And the welding efficiency  higher than that of the titanium type drug. The core wire even higher. At present, there is no uniform standard for the classification of flux-cored wire. Many countries classify flux-cored wire into four types according to the type of flux-cored wire and the form of droplet transfer. Namely, titanium type, alkali type, metal powder type and self-protecting flux-cored wire.