No. 2 Heavy Melting Steel Scrap contains wrought iron and steel scrap, black and galvanized. 

The difference between No. 2 Heavy Melting Steel Scrap and No. 1 Heavy Melting Steel Scrap is #2 HMS contains galvanized and blackened steel whereas #1 HMS does not contain them.

According to ISRI Specifications, HMS 2 is classified into four types of grades:

• No. 2 Heavy Melting Steel Scrap [ISRI Code 203]: ⅛ inch and over in thickness, charging box size to include material not suitables as No. 1 Heavy Melting Steel Prepared in a manner to insure compact charging.
• No. 2 Heavy Melting Steel Scrap [ISRI Code 204]: Max. size 36 x 18 inches. It may include all automobile scrap properly prepared.
• No. 2 Heavy Melting Steel Scrap 3 feet x 18 inches [ISRI Code 205]: Max. size 36 x 18 inches. It may include automobile scrap, properly prepared; however, to be free of sheet iron or thin gauged material.

No. 2 Heavy Melting Steel Scrap 5 feet x 18 inches [ISRI Code 206]: Max. size 60 x 18 inches. It may include automobile scrap, properly prepared; however, to be free of sheet iron or thin gauged material