Hot-rolled structural steel. The letter S (S = Structural), followed by a number which indicates the yield strength (in this case 355). J2 indicates the minimum impact strength of 27 Joules (J) at a test temperature of -20°C. N indicates a normalized rolling condition. The C means that it is possible to cold-form the material AWS has a large assortment of commercial sizes in stock. Tailored to the demands and needs of our customers.