S420ML Grade steel is a technical delivery conditions for thermo mechanical rolled weldable fine grain structural steels.
S means the structural steel, M means the delivery condition.
Capital letter L for the quality with specified minimum values of values of impact energy at temperature not lower than -50 degree.
S420ML steel Chemical composition：
Nominal thickness≤16(mm) CEV max = 0.43
Nominal thickness form 16 to 40(mm) CEV max = 0.45
Nominal thickness form 40 to 63(mm) CEV max = 0.46
Nominal thickness from 63 to 150 (mm) CEV max = 0.47
Under Europe standard EN 10025_4, steel plate S420ML shall be rolled under thermomechanical,and be done low temperature impacting test at minus 50 centi degree with minimum 27J on longitudinal V_notch test pieces for thermomechanical rolled steel S420ML.
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