Flat steel for automobile girder

The flat steel for automobile girder (longitudinal beam and cross beam) is usually low alloy hot rolled steel with thickness of 2.5-12.0mm. The shape of automobile girder is complex, which requires good stamping performance in addition to high strength and cold bending performance.

The automobile girder is the main load-bearing part of the truck, carrying almost all the weight of the goods. The quality of the girder affects the service life and driving safety of the whole vehicle. The automobile girder is generally manufactured by stamping forming process, and its deformation mode is mainly bending. Therefore, the flat steel for automobile girder requires high formability, that is, the automobile girder steel must have good comprehensive performance and sufficient strength and toughness, good fatigue resistance and cold formability. With the development of automobile industry, high-strength steel that reduce weight and improve safety, and new products with excellent strength and formability are the main body of automobile steel demand and development direction. In order to improve the bearing capacity of automobile, prolong the service life of automobile and meet the requirements of energy saving, material saving and safe driving, the production of automobile girder steel with low alloy high strength and ultra-high strength steel has become the development trend of automobile girder steel.