Ultra High Strength Steel
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Ultra High Strength Steel
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This information provides repair recommendations and general guidelines for steel classified as Ultra High Strength Steel, also know as UHSS. This type of steel normally has a tensile strength greater than 700 MPa.
This includes the common steel names of
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Ultra High Strength Steel (UHSS)
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Press Hardened Steel (PHS)
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General Motors recommends the following when repairing or replacing this type of steel during collision repair.
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Note
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Repair of this type of steel is not recommended.
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This type of steel should be replaced only, at factory joints. Sectioning or partial replacement is not recommended.
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The use of heat to repair damage is not recommended for this type of steel.
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Stitch Welding is not recommended for this type of steel.
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This type of steel can not be used as a backing reinforcement or a sleeve for a sectioning joint.
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Recommended Repairs
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Squeeze Resistance Spot Welding can be used to replace factory spot welds, where applicable.
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MIG plug welding can be used to replace factory spot welds.
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MIG Brazing can be used to replace factory spot welds.
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