TARIFF SCHEDULES OF THE UNITED STATES
SCHEDULE 6. - METALS AND METAL PRODUCTS Part 2. - Metals, Their Alloys, and Their Basic Shapes and Forms Rates of Duty
(f) Wrought iron: A ferrous material, aggregated from a solidifying mass of pasty particles of highly refined metallic iron with which a uniformly distributed quantity of slag is incorporated without subsequent fusion. A cross section 90 degrees from the rolling direction of wrought iron contains a minimum of 200,000 slag filaments per square inch of cross section. Wrought iron may contain elements other than iron but iron must predominate, by weight, over each one. (g) Steel: An alloy of iron and carbon which is malleable as first cast. Steel may contain other elements intended to enhance one or more properties and may contain elements unavoidably retained from raw materials, but iron must predominate, by weight, over each of the other elements. Ih) Alloy iron or steel: The term "alloy" when used as an adjective to designate a type or grade of iron or steel embraces only -— (i) iron which contains one or more of the following elements in the quantity, by weight, respectively indicated: over 3.00 percent of manganese, or over 5.00 percent of phosphorus, or over 5.00 percent of sulphur, or over 3.00 percent of silicon, or over 0.20 percent of chromium, or over 0,10 percent of molybdenum, or over 0.30 percent of tungsten, or over 0.10 percent of vanadium, or over 0.60 percent of any other metallic element; and iil) steel which contains one or more of the following elements in the quantity, by weight, respectively indicated: over 1.65 percent of manganese, or over 0.25 percent of phosphorus, or over 0.35 percent of sulphur, or over 0.60 percent of silicon, or over 0,60 percent of copper, or over 0.30 percent of aluminum, or over 0.20 percent of chromium, or over 0,30 percent of cobalt, or over 0.35 percent of lead, or over 0.50 percent of nickel, or over 0.50 percent of tungsten, or over 0.10 percent of any other metal I Ic element. In the absence of context which requires othennrlse, wherever used in the tariff schedules, the term — (ili) "Iron or steel" includes alloy iron or steel; and (Iv) "stainless steel" refers to any alloy steel which contains by weight \e,ss than I percent of carbon and over 11.5 percent of chromium.