|
Grade Availability
Stretch flanging (SF) steels are currently under development at Mittal Steel USA. Hot and cold rolled products currently being evaluated are shown in the table below.
| Tensile Strength |
Hot Rolled |
Cold Rolled |
| Uncoated |
Uncoated |
EG |
HDGI |
HDGA |
| 590 MPa |
DEV
HFT 590 SF |
- |
- |
- |
- |
| 780 MPa |
DEV
DI-FORM™ SF T780 |
- |
- |
- |
- |
| 980 MPa |
- |
DEV
DI-FORM™ SF T980 |
- |
- |
- |
EG: Electrogalvanized
HDGI: Hot-Dip-Galvanized
HDGA: Hot-Dip-Galvannealed |
'DEV' products are under development or in limited production.
Please inquire about the status and availability of these products. |
Product Characteristics
The chemistry and microstructure is controlled in these new advanced high strength steels (AHSS) sheet to realize improved stretchability, and to enable it to undergo stretch flanging, in which high degrees of localized flexing and stretching are generated. This has resulted in an increase in the hole expansion ratio to about 80%-an indicator of stretch flange formability. Stretch flanging steels being developed at Mittal Steel USA will have high strength, good formability and very high hole expansion capabilities. Microstructure of these steels can be complex and can contain ferrite, martensite, bainite and retained austenite.
Application
Stretch flanging steels can be used for automotive body structure and chassis applications, where the high formability and stretch flangeability of these products can be effectively used for manufacturing quality high performance parts.
|
