ISRI 200 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″ (Charging box size) prepared in a manner to insure compact charging.

ISRI 201 No.1 Heavy Melting Steel 3 feet x 18″. Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not over 36″ X 18″ (Charging box size) prepared in a manner to insure compact charging.

ISRI 202 No.1 Heavy Melting Steel 5 feet x 18″. Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not over 60″ X 18″ (Charging box size) prepared in a manner to insure compact charging.

ISRI 203 No.2 Heavy Melting Steel. Wrought iron and/or steel scrap, black and galvanized, 1/8 inch and over in thickness. Charging box size to include material not suitable as No. 1 heavy melting steel. Prepared in a manner to insure compact charging.

ISRI 204 No.2 Heavy Melting Steel. Wrought iron and/or steel scrap, black and galvanized, maximum size 36″ X 18″. May include all automobile scrap properly prepared.

ISRI 205 No.2 Heavy Melting Steel 3 feet x 18″. Wrought iron and steel scrap, black and galvanized, maximum size 36″ X 18″. May include automobile scrap, properly prepared, however, to be free of sheet iron or thin gauged material.

ISRI 206 No.2 Heavy Melting Steel 5 feet x 18″. Wrought iron and steel scrap, black and galvanized, maximum size 60″ X 18″. May include automobile scrap, properly prepared, however, to be free of sheet iron or thin gauged material.