Location: USA, CHICAGO ILLINOIS

HMS 1&2.
Heavy melting steel (HMS) or heavy melting scrap is a designation for recyclable steel and wrought iron. It is broken up into two major categories: HMS 1 and HMS 2, where HMS 1 does not contain galvanized and blackened steel, whereas HMS 2 does. The Institute of Scrap Recycling Industries breaks up the categories further:[1] ISRI 200 (HMS 1): Wrought iron or steel scrap 1⁄4 inch (6.35 mm) and larger in thickness. All pieces must be smaller than 60 in × 24 in (1,524 mm × 610 mm) ISRI 201 (HMS 1): Same as ISRI 200 except pieces must be smaller than 36 in × 18 in (914 mm × 457 mm). ISRI 202 (HMS 1): Same as ISRI 200 except pieces must be smaller than 60 in × 18 in (1,524 mm × 457 mm). ISRI 203 (HMS 2): Wrought iron or steel scrap, black and galvanized, 1⁄8 inch (3.175 mm) and larger in thickness. ISRI 204 (HMS 2): Same as ISRI 203 except pieces [1]must be smaller than 36 in × 18 in (914 mm × 457 mm). ISRI 205 (HMS 2): Same as ISRI 204 except it may contain automotive scrap except for thin gauge material. ISRI 206 (HMS 2): Same as ISRI 205 except pieces must be smaller than 60 in × 18 in (1,524 mm × 457 mm). HMS 1 and 2 are widely traded, particularly in the western hemisphere. Both HMS 1 and 2 comprise obsolete scrap only - iron and steel recovered from items demolished or dismantled at the end of their life.