This information provides repair recommendations and general guidelines for steel classified as Ultra High Strength Dual Phase Steel (Dual Phase Steel with a tensile strength greater than 800 MPa), also known as DPX.
General Motors recommends the following when repairing or replacing this type of steel during collision repair.
Note:
• Repair of this type of steel is not recommended. • This type of steel should be replaced at factory joints only. Sectioning or partial replacement is not recommended. • The use of heat to repair damage is not recommended for this type of steel. • Stitch welding is not recommended for this type of steel. • This classification of steel can not be used as a backing reinforcement or a sleeve for a sectioning joint, unless a specific procedure is available.
Recommended Repairs:
| • | Squeeze resistance spot welding can be used to replace factory spot welds, where applicable. |
| • | MIG plug welding can be used to replace factory spot welds. |
| • | MIG brazing can be used to replace factory spot welds. |
