Metal CastingChina Melting Chemical Composition S20c, S45c, S50c, S55c, S235, S355 Hot Rolled/Forged Steel Round/Square/Flat Bar, Find details about China S355 Steel Bar, S355jr Steel Round Bar from Melting Chemical Composition S20c, S45c, S50c, S55c, S235, S355 Hot Rolled/Forged Steel Round/Square/Flat Bar