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Does aluminium need heat treatment after bending?

Why bending affects strength

Cold forming changes the structure of the metal. In some alloys this lowers the strength near the bend, in others it raises it.

When we heat treat

For parts with strength requirements we often bend in a soft temper and then age the part to its final temper. We advise on this per alloy.

Short answer
Not always. It depends on the alloy, the temper and how much the material is deformed. Some parts are bent in a soft temper and hardened afterwards.

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