Forming（stainless head）: As opposed to cold rolling, cold rolling is that under the temperature of stainless steel head, forming is in the recrystallization temperature above the rolling.

Characteristics of elliptical head:

1. Elliptical head has poor toughness and surface flatness and low price;

2. Forming temperature and forging temperature close;

3. Hot plate with hot tie processing surface oxide skin, plate thickness has a difference;

4. Because the production technical of elliptical head makes it used more in civil respect, such as kitchen appliances and general household appliances etc,.

5. Forming steel sheets, mechanical properties are far less than cold processing, and second to forging processing, but shows better toughness and ductility.

    Cold-rolled head: It is processed and rolled on the basis of the formed coil. Generally speaking, it is a processing process from forming to pickling to cold rolling. Although the steel plate will warm up during the processing because of rolling, it is still called cold rolling. As a result of forming after continuous cold deformation of the cold rolling, in the mechanical performance is poor, hardness is too high. It must be annealed to restore its mechanical properties, and the unannealed is called a hard roll. Rolled hard rolls are generally made of pressure vessel heads that do not require bending or stretching.

Characteristics of the torispherical head:

1. Cold-rolled steel sheet has Some degree of work hardening, low toughness, so is more expensive;

2. The surface of the cold-rolled head is non-oxide scale, with good quality;

3. Products made by cold deformation have high dimensional accuracy and good surface quality;

Cold-rolled heads are widely used in various industries due to their production processes, such as cold stampings, cold-rolled profiles, cold-rolled springs, cold-drawn wires, cold-rolled bolts, etc.