Metal bellows is a regular shape of the wave like pipe, commonly used metal bellows are carbon steel, stainless steel, steel lined with plastic, aluminum and so on. It is mainly used for non-concentric axial transmission with a small bending radius, or irregular turning, expansion, or absorption of thermal deformation of the pipeline, etc., or is not convenient to use fixed elbow installation as the connection between the pipeline and the pipeline, or the connection between the pipeline and the equipment. Metal bellows as sensitive components, shock absorption components, compensation components, sealing components, valve components and pipeline connectors, widely used in automatic control and measuring instruments, vacuum technology, machinery industry, electric power industry, transportation and atomic energy industry and other fields.

Metal bellows are made of different metal materials for different uses. Because of its different material, so the processing of metal bellows performance and use are also different.