1. As used in this Chapter, the following words and phrases shall mean:
(a) Pig iron (heading No. 73.01):
A ferrous product containing, by weight 1.9 per cent or more of carbon and containing, separately or together:
less than 15 per cent phosphorus,
not more than 8 per cent silicon,
not more than 6 per cent manganese,
not more than 30 per cent chromium,
not more than 40 per cent tungsten,
and an aggregate of not more than 10 per cent of other alloy elements
(e.g., nickel, copper, aluminum, titanium, vanadium, molybdenum).
(b) Spielgeleisen (heading No. 73.01):
A ferrous product containing, by weight, more than six per cent but not more than thirty per cent of manganese and otherwise conforming to the specification at (a) above.
(c) Ferroalloys (heading No. 73.02):
Alloys of iron which are not usefully malleable and are commonly used as raw material in the manufacture of ferrous metals and which contain, by weight, separately or together:
more than 8 per cent of silicon,
or more than 30 per cent manganese,
or more than 30 per cent of chromium,
or more than 40 per cent of tungsten,
or a total of more than ten per cent of other alloy elements
(e.g., copper, aluminum, titanium, vanadium, molybdenum, niobium), and which do not contain more than ninety per cent (ninety-two per cent in the case of ferroalloys containing manganese or ninety-six per cent in the case of ferroalloys containing silicon) of nonferrous alloy elements.
(d) Alloy steel (heading No. 73.15):
Steel containing less than 1.9 per cent carbon and containing, by weight, one or more elements in the following proportions: more than 2 per cent of manganese and silicon taken together,
2.00 per cent or more of manganese,
2.00 per cent or more of silicon,
0.50 per cent or more of nickel,
0.50 per cent or more of chromium,
0.10 per cent or more of molybdenum,
0.10 per cent or more of vanadium,
0.30 per cent or more of tungsten,
0.30 per cent or more of cobalt,
0.30 per cent pr more of aluminum,
0.40 per cent or more of copper,
0.10 per cent or more of lead,
0.12 per cent or more of phosphorus,
0.10 per cent or more of sulphur,
0.20 per cent or more of phosphorus and sulphur, taken together, or 0.10 per cent or more of other elements, taken separately.
(e) High carbon steel (heading No. 73.15): Steel containing, by weight, less than 1.9 per cent but not less than 0.6 per cent of carbon.
(f) Puddle bars and pilings (heading No. 73.06);
Products for rolling, remelting or forging obtained by shingling and hot rolling either:
(1) balls of puddled iron, or
(2) packets of scrap iron or steel or puddled iron. (g) Ingots (heading No. 73.06): Products for rolling or forging obtained by casting into molds.
(h) Blooms and billets (heading No. 73.07): Semi-finished products of rectangular section, of a cross-sectional area exceeding 1,225 square millimeters and of such dimensions that the thickness exceeds one quarter of the width.
(i) Slabs and sheet bars (heading No. 73.07): Semi-finished products of rectangular section, of a thickness not less than six millimeters, of a width not less than one hundred fifty millimeters and of such dimensions that the thickness does not exceed one quarter of the width. (j) Coils for rerolling (heading No. 73.08): Coiled semi-finished products, of rectangular section, not less than 1.5 millimeters thick, of a width exceeding five hundred millimeters and of a weight of not less than five hundred kilograms per piece.
(k) Universal plates (heading No. 73.09): Products of rectangular section, hot-rolled lengthwise in a closed box or universal mill, of a thickness not less than six millimeters but not exceeding one hundred millimeters, and of a width exceeding one hundred and fifty millimeters, but not exceeding 1,200 millimeters. (l) Hoop and strip (heading No. 73.12): Rolled products with sheared or unsheared edges, of rectangular section, of a thickness not exceeding six millimeters, of a width not exceeding five hundred millimeters and of such dimensions that the thickness does not exceed one tenth of the width, in straight strips, coils, or flattened coils.
(m) Sheets and plates (heading No. 73.13): Rolled products (other than coils for rerolling as defined in paragraph (j) above) of a thickness not exceeding one hundred and twenty-five millimeters and, if in rectangles, of a width exceeding five hundred millimeters. Heading No. 73.13 shall apply, INTER ALIA, to sheets or plates which have been cut to non-rectangular shape, perforated, corrugated, curved, channeled, ribbed, polished or coated. (n) Wire (heading No. 73.14): Cold drawn products of solid section of any cross-sectional shape, of which no cross-sectional dimension exceeds thirteen millimeters. In the case of headings numbered 73.26 and 73.27, however, the term "wire" includes rolled products of the same dimensions.
(o) Bars and rods (heading No. 73.10): Products of solid section which do not conform to the entirety of any of the definitions (h), (i), (j), (k), (l), (m) and (n) above and which have cross-sections in the shape of circles, segments of circles, isosceles triangles, rectangles, hexagons, octagons or quadrilaterals with only two sides parallel and the other sides equal.
(p) Hollow mining drill steel (heading No. 73.10): Hollow steel products, being products of other than square or circular section and suitable for mining drills, of which the greatest external dimension exceeds fifteen millimeters but does not exceed fifty millimeters, and of which the latest internal dimension does not exceed one-third of the greatest external dimension. Other steel hollow bars shall be treated as falling within heading No. 73.18.
(q) Angles, shapes and sections (heading No. 73.11): Products, other than those falling within heading No. 73.16, which do not conform to the entirety of any of the definitions (h), (i), (j), (k), (l), (m) and (n) above, and which do not have cross-sections in the form of circles, segments of circles, isosceles triangles, rectangles, hexagons, octagons or quadrilaterals with only two sides parallel and the other two sides equal, and which are not hollow.
2. Headings numbered 73.06 to 73.14 shall not apply to articles of alloy or high carbon steel (heading No. 73.15).
3. The expression "high-pressure hydroelectric conduits of steel" (heading No. 73.19) means riveted or welded circular steel tubes or pipes of a diameter exceeding four hundred millimeters and of a thickness exceeding 10.5 millimeters.
