Automobile Steel

1. Dual Phase Steels (DP Steel)

Performance characteristics: no yield extension, no room temperature aging, low yield strength ratio, high work hardening index and high bake hardening value.
Typical applications: DP series high-strength steel is the preferred steel for structural parts, and is widely used in structural parts, reinforcements and anti-collision parts. For example, cross members, rails, anti-collision bars, anti-collision bar reinforcement structural parts, etc.

2. Complex Phase Steels (CP Steel)

Performance characteristics: fine grains and high tensile strength. Compared with dual-phase steels of the same level of tensile strength, its yield strength is significantly higher. It has good bending performance, high hole expansion performance, high energy absorption capacity and excellent flanging forming performance.
Typical applications: chassis suspension parts, B-pillars, bumpers, seat rails, etc.

3. Transformation Induced Plasticity Steels (TRIP Steel)

Performance characteristics: The structure contains retained austenite and has good forming performance. During the forming process, the retained austenite will gradually transform into hard martensite, which is conducive to uniform deformation. TRIP steel also has the characteristics of high collision absorption energy, high strength-plasticity product and high n value.
Typical applications: parts with relatively complex structures, such as B-pillar reinforcement plates, front longitudinal beams, etc.

4. Martensitic Steels (MS Steel)

Performance characteristics: high yield strength ratio, high tensile strength, relatively low elongation, and the tendency to delayed cracking needs to be noted.
Typical applications: cold stamping of simple parts and roll-formed parts with relatively simple cross-sections, such as bumpers, door sill reinforcements, and anti-collision bars in side doors.

5. Quenching and Partitioning Steels (QP Steel)
Performance characteristics: With martensite as the matrix phase, the TRIP effect of retained austenite during deformation can achieve higher work hardening ability, so it has higher plasticity and forming performance than the same level of ultra-high strength steel.
Typical applications: Suitable for automotive safety parts and structural parts with more complex shapes, such as A and B pillar reinforcements.

6. Twinning Induced Plasticity Steels (TWIP Steel)
Performance characteristics: TWIP steel is a fully austenitic steel with high C, high Mn and high Al content. Through the dynamic refinement induced by twinning, it can achieve extremely high work hardening ability. TWIP steel has ultra-high strength and ultra-high plasticity, and the strength-plasticity product can reach more than 50GPa%.
Typical applications: TWIP steel has very superior forming performance and ultra-high strength, and is suitable for parts with high requirements for material drawing and bulging performance.

7. Press Hardening/Boron Steels (PH Steel or B Steel)
Performance characteristics: ultra-high strength (tensile strength of more than 1500MPa), effectively improve collision performance, lightweight body; complex part shape, good formability; high dimensional accuracy.
Typical applications: safety structural parts, such as: front and rear bumpers, A-pillars, B-pillars, center channels, etc.