ferrous
Iron and steel scrap, or ferrous scrap, comes from many consumer products like automobiles and household appliances to industrial structures and equipment such as buildings, railroads, trains, bridges, ships, and farming equipment.
TECHNICAL ASPECTS
Cleanness: All grades must be free of dirt, nonferrous metals, or foreign material of any kind, and excessive rust and corrosion.
Off-grade material: The inclusion in a shipment of a particular grade of iron and steel scrap of a negligible amount of metallic material which exceeds to a minor extent the applicable size limitations, or which fails to a minor to meet the applicable requirements as to quality or kind of material, shall not change the classification of the shipment provided it can be shown that the inclusion of such off-grade materials is unavoidable in the customary preparation and handling of the grade involved.
Residual alloys: Wherever the terms "free of alloys" is used in the classifications given, it shall mean that any alloys contained in the steel are residual and have not been added for the purpose of making alloy steel.