Part 2 of this European Standard, in addition to Part 1, specifies requirements for plates and wide flats of high yield strength alloy special steels. The grades and qualities are given in tables 1 (chemical composition) and 2 and 3 (mechanical properties) and are supplied in the quenched and tempered condition as given in 7.2. The steels specified in this European Standard are applicable to hot-rolled plates and wide flats with a minimum nominal thickness of 3 mm and a maximum nominal thickness ? 150 - for grades S460, S500, S550, S620 and S690, a maximum nominal thickness ? 100 mm for grade S690 and a maximum nominal thickness ? 50 mm for grade S960, in steels which, after quenching and tempering, have a specified minimum yield strength of 460 N/mm2 to 960 N/mm2.
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