HMS 2 would be lighter steel scrap such as bicycle frames, and sheet scrap less than 3.2mm thick. HMS 2 may contain galvanized and blackened steel.
ISRI 203 No. 2: Heavy melting steel.* Wrought iron and steel scrap, black and galvanized, 1/8 inch and over in thickness.
ISRI 204 No. 2: Heavy melting steel.* Wrought iron and steel scrap, black and galvanized, maximum size 36 x 18 inches. May include all automobile scrap properly prepared.
ISRI 205 No. 2: Heavy melting steel 3 feet by 18 inches. Wrought iron and steel scrap black and galvanized, maximum size 36 x 18 inches.
ISRI 206 No. 2: Heavy melting steel 5 feet by 18 inches. Wrought iron and steel scrap black and galvanized, maximum size 60 x 18 inches. It may include automobile scrap properly.