HMS1&2 (80:20) Steel scraps shall be considered free of alloys when the residual alloying elements do not exceed the following percentages:Nickel 0.45 Chromium 0.20 Molybdenum 0.10 Manganese 1.65 The combined residuals other than manganese shall not exceed a total of 0.60 percent. ISRI-CODES: HMS 1200 No. 1 heavy melting steel. Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not over 60 x 24 inches (charging box size) prepared in a manner to insure compact charging. 201 No. 1 heavy melting steel 3 feet x 18 inches. Wrought iron and/or steel scrap ¼ inch and over in thickness. Individual pieces not over 36 inches x 18 inches (charging box size) prepared in a manner to insure compact charging. 202 No. 1 heavy melting steel 5 feet x 18 inches. Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not over 60 inches x 18 inches (charging box size) prepared in a manner to insure compact charging. HMS 2203 No. 2 heavy m