The hot rolled QStE260N automotive steel sheet

The hot rolled QStE260N automotive steel sheet

The hot rolled QStE260N automotive steel sheet is a micro-alloy fine-grained steel with high yield strength and its yield-tensile ratio is above 0.85. The hot rolled QStE260N automotive steel sheet is mainly used for the manufacture of automobile frame longitudinal beams, cross beams, brake discs and wheels and other stressed parts.

The hot rolled QStE260N automotive steel sheet adopts precipitation strengthening mechanism.
The strength of hot rolled QStE260N automotive steel sheet is significantly improved by using controlled rolling process based on the addition of microalloy elements. However, because the precipitation strengthening effect is sensitive to the hot-rolled process conditions, the strength fluctuation range is large, especially the yield strength ratio of precipitation strengthening steel is generally high, and the spring back is large when forming, which reduces the shape stability after forming and is not conducive to cold forming of hot rolled QStE260N automotive steel sheet. 

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