HMS1 or Heavy Metal Scrap type 1 is a thick used steel. It is categorized as type 1 due to its thickness that has to be 5 mm. or more.
Size: Thickness = 5 mm. or more
For example: Building structure steel, I-beam, H-beam, U-shape, angle bar, channel steel, machine steel scrap, ship plates, car spare parts, wheel caps, thick bolts and nuts, deformed bar steel (diameter: not less than 5 mm.), quarter-inch steel rods, steel chain, used thick stamping plates, cut gas tanks, etc.