Sheet metal materials must have good plasticity. The ability to produce long-term deformation under external forces without being destroyed. For cold working parts, good cold plasticity is required, such as stamping parts for automotive parts; For hot working parts, good thermoplastic properties are required, such as hot forged spring steel plates, hot riveted rivets, etc.
2. Good weldability. Many automotive sheet metal parts are fused together through spot welding, oxygen welding, arc welding, or gas shielded welding, so it is required that sheet metal parts must have good welding performance. This is particularly important in automotive repair and repair, as materials with good weldability have high welding strength and less tendency to crack.
3. Low price, economical and practical. For any component of a car, economic efficiency should be considered while meeting working conditions. Can use black metal, not non-ferrous metal; Can use non-ferrous metals, never precious metals. The lifespan of automotive sheet metal components should be compatible with the lifespan of other automotive components.
4. Good chemical stability. Most car coverings work in outdoor environments, often in contact with water and steam, especially like mufflers, which often work at higher temperatures and corrosive gases. This requires sheet metal parts to have good chemical stability, which requires corrosion resistance and strong rust resistance at room temperature, as well as resistance to corrosion and deformation under high temperatures or direct sunlight.
5. Good dimensional accuracy and intrinsic quality of the board. The dimensional accuracy and intrinsic quality of sheet metal have a great impact on sheet metal processing, especially on molded parts