ASTM A588 Grade B(A588 Gr B) is a high-strength low-alloy structural (HSLA) steel in various shapes: plates, sheets, round bars and steel sections. This plate has a specified minimum yield strengths of 50ksi [345MPa] when plate thickness under 100mm. As a leading supplier of HSLA steel plate and sheet in China, we can supply A588 Gr B HSLA steel plate specification with various shapes and thickness up to 200mm[8 inch]. Mechanical properties Tensile strength min. MPa 485 Yield strength min. MPa 345 Elongation min. 21 ASTM A588 Gr B HSLA plate sheet specification Dimension range : 1.2mm -680mm x 1000mm-4000mm x 1000mm-18000mm MOQ: 1 PC Product type : Steel plate Delivery time : Promptly ( Stock) or 10-40 days (Production) Stock : Available MTC: Available Payment Term : T/T or L/C At sight For application, ASTM A588 Gr B HSLA plate and sheet in most environments are substantially better than that of ordinary carbon structural steels. When properly exposed to the atmosphere, this steel can be used unpainted for many applications.