HMS 1/2 80/20 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. The difference between the two is HMS 1 does not contain galvanized and blackened steel, whereas HMS 2 does. Get in touch for pricing, be sure to include Spot or Contract and umber of months, also include target pricing.