Mild Steel
This information provides repair recommendations and general guidelines for steel classified as Mild Steel. This type of steel normally has a tensile strength less than 270 MPa. This includes the common steel names of:
| • | Bake Hardenable Steel (BH) |
| • | Solid Solution Strengthened Steel |
General Motors recommends the following when repairing or replacing this type of steel during collision repair.
Recommended Repairs:
| • | Cold repairs can be performed on this type of steel, unless the damage includes kinks. If the damage includes kinks, the part should be replaced. |
| • | Controlled use of heat can be used to repair damage, if the heat does not exceed 650°C (1200°F). The heat should be applied a maximum of 2 times, for up to 90 seconds. |
| • | Sectioning or partial replacement of this type of steel is recommended only at approved locations, in a specific sectioning procedure. |
| • | This type of steel can be used as a sleeve, or backer plate, when recommended in a specific sectioning procedure. |
| • | Squeeze Resistance Spot Welding can be used to replace factory spot welds, where applicable |
| • | MIG plug welding and MIG stitch welding can be used on this type of steel. |
| • | MIG Brazing can be used on this type of steel. |
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