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Because of their high strength, high strength steel plates require a larger bending force than mild steel, but their high ductility makes them easy to cold works. High strength steel plates exhibits a greater spring back than mild steel, so attention is necessary during the working process. It is desirable to bend these plates parallel to direction of rolling, with a bend to a smaller radius, edges should be rounded by grinding. As the crack susceptibility of a plates edge increases as bend radius decreases.