Ultra-thin automotive steel coils: a breakthrough in weight reduction and fuel consumption reduction

Material Innovation
Baosteel's GPA Steel® uses nano-scale grain refinement technology to reduce automotive steel sheet thickness to less than 0.6mm, while achieving a tensile strength exceeding 1800 MPa, achieving the properties of "thin as paper, strong as steel." While its density is 15% lower than traditional steel, it meets Euro-NCAP side impact standards, providing safety margins for vehicle weight reduction.

Structural Optimization
Laser welding technology precisely joins ultra-thin automotive steel coils of varying thicknesses. For example, the Audi A8's doors utilize a combination of 0.8mm and 1.2mm steel sheets, reducing weight by 12% while increasing torsional stiffness by 28%. Tesla's integrated die-casting process consolidates 70 parts into two, reducing weld points by 90% and increasing production efficiency by 40%.

Energy Efficiency Improvement
The use of ultra-thin automotive steel coils reduces vehicle weight by up to 8%, lowering fuel consumption by 0.5L/100km for gasoline vehicles and increasing the range of electric vehicles by 25km.