Bainitic steels and dual-phase steels with guaranteed hole expansion
General:
This new multiphase steel generation has the term xpand® added to its name. The term xpand® is based on the Latin word expandere (= extend, expand) and stands for a guaranteed, increased capacity for hole expansion in the steel. The xpand® steels' forming characteristics are optimized by the higher hole expansion ratio and enable the manufacture of more complex component geometries. Due to the fact that xpand® steels exhibit reduced susceptibility to edge cracks, it is possible to lower the outage risk in spite of thinner sheet thicknesses.
Customer benefits:
- Dual Phase steels: high tensile strength and at the same time very good formability, suitable for edge forming.
- Complex phase steel: high yield strength, low edge crack sensitivity, guaranteed high hole Expansion ratio.
- Bainitic steels: superior fatigue properties, low edge crack sensitivity.
| Steel grade | VDA designation | Thickness in mm | Width in mm | Yield strength in MPa (longitudinal) | Tensile strength in MPa (longitudinal) | Guaranteed hole Expansion ratio |
| SZBS600xpand® | - | 2.00 - 6.00 | 900 - 1,500 | 480 - 5801 | 590 - 6701 | 75 % |
| SZBS800xpand®40 | - | 1.80 - 8.00 | 900 - 1,500 | ≥6801 | 800 - 9801 | 40 % |
| SZBS800xpand®50 | - | 1.80 - 8.00 | 900 - 1,500 | ≥6801 | 800 - 9801 | 40 % |
| HCT600Xxpand®+Z | CR330Y590T-DP | 0.50 - 3.00 | 900 - 1,750 | 340 - 420 | 600 - 700 | 50 % |
| HCT780Xxpand®+Z | CR440Y780T-DP | 0.70 - 2.50 | 900 - 1,800 | 440 - 550 | 780 - 900 | 30% |
| HCT780Cxpand®+Z | CR570Y780T-CP | 0.70 - 2.00 | 900 - 1,800 | 500 - 700 | ≥780 | 40 % |
| HCT980Xxpand®+Z | CR590Y980T-DP | 1.00 - 2.00 | 900 - 1,350 | 600 - 750 | 980 - 1,130 | 20 % |
| CR650Y980T-DP | 1.00 - 2.00 | 900 - 1,350 | 660 - 810 | 980 - 1,130 | 20 % | |
| HCT980XGxpand® | CR700Y980T-DP | 1.00 - 2.00 | 900 - 1,350 | 700 - 850 | 980 - 1,130 | 20 % |
