QStE380TM is a cold-formed hot-rolled pickling automotive structural steel designed for structural parts in automotive manufacturing, especially for parts requiring good cold-formed properties and high strength.
QStE380TM steel features:
Good cold formability: QStE380TM steel has good cold formability, easy to bend, press and other processing operations in cold state, to meet the needs of complex shape parts in automotive manufacturing.
High strength and rigidity: QStE380TM steel has high strength and rigidity to meet the requirements of automotive structural parts for load carrying capacity and safety.
Excellent fatigue resistance: QStE380TM steel can maintain stability under cyclic load and is not prone to fatigue fracture, ensuring the reliability of automotive structural parts in long-term use.
Good low temperature performance: In low temperature environment, QStE380TM steel can still maintain high strength and hardness, to avoid the occurrence of cold brittleness.
Excellent processing performance: QStE380TM steel has good cutting, welding and other processing properties, easy to carry out various processing operations, improve production efficiency.
Chemical composition of QStE380TM steel:
Carbon (C) : ≤0.12%
Silicon (Si) ≤0.35% (or ≤0.50%, may vary according to different standards)
Manganese (Mn) : ≤1.40% (or ≤1.50%, may vary according to different standards)
Phosphorus (P) : ≤0.03%
Sulfur (S) : ≤0.025%
Aluminum (Alt) : ≥0.01% (or ≥0.015%, may vary according to different standards)
Other trace elements (such as Nb, V, Ti, etc.) may also be included, but at lower levels.
Mechanical properties of QStE380TM steel:
Yield strength: ≥380MPa
Tensile strength: 450-590MPa
Elongation: ≥23% (or ≥18%, may vary according to different standards)
QStE380TM steel is widely used in the automotive industry, especially in the production of various automotive structural components such as body frames, chassis beams, load-bearing structures and safety parts. Its high strength and excellent formability enable automotive structural components to achieve lightweight design, improve fuel economy and reduce CO2 emissions. At the same time, its good impact toughness and fatigue resistance also ensure the reliability and durability of automotive structural parts in complex working environments.
