GB/T 20887.4
GB/T 20887.4 (Continuously hot rolled high strength steel sheet and strip for automobile. Part 4: Transformation induced plasticity steel)· GB (China) · 2 materials
| Designation | Material group | |
|---|---|---|
| HR400/590TR | Structural and constructional steels | chevron_right |
| HR450/780TR | Structural and constructional steels | chevron_right |