SM400 Grade C SM400C steel plate__Steel Supplier. GANGSTEEL Galvanized Coil Steel Stock List and Price 2016-02-25 PONSSE WINS THE 2015 SWEDISH ST The tension was high as Gregoire Parenty and Martin Lindqvist took the stage to announce the winner of the 2015 . SM400C steel plate - BEBON INTERNATIONAL. Bebon International is a professional SM400C steel exporter and a steel Low Alloy Steel Sheet S275 Sm490 S355 Astm/en/bs by Low alloy high strength steel sheet Steel grade S275, SM490 and S355 are consisted in low alloy high strength steel plates. 1. Steel Standards:JISG3106, DIN17100, DIN17102, ASTM, EN10025, EN10113, BS4360, ISO630, ISO4950-2, ISO4950-3.