WCO Explanatory Notes reproduced for reference. © World Customs Organization. Verify against official WCO publication.
72.28 Other bars and rods of other a110 steel; angles, shapes and sections, of other alloy steel; hollow drill bars and rods, o alloy or non-alloy steel (+). I 7228.20 - Bars and rods, of high speed steel - Bars and rods, of silico-manganese steel 7228.30 - Other 7228.40 - Other bars and rods, not further worked than forged - Other bars and rods, not further worked than cold-formed or cold-finished - Other bars and rods - Angles, shapes and sections - Hollow drill bars and rods 7228.10 7228.50 7228.60 7228.70 7228.80 bars and rods, not further worked than hot-rolled, hot-drawn or extruded (A) OTHER BARS AND RODS; ANGLES, SHAPES AND SECTIONS The provisions of the Explanatory Notes to headings 72.14 to 72.16 apply, mutatis mutandis, to the products of this headmg. (l3) HOLLOW DRILL BARS AND RODS Hollow drill bars and rods are defmed in Note 1 (p) to this Chapter. They are also known as drill steel. Drill steel is produced by piercin billets of alloy or non-alloy steel which are then re-rolled. The usual cross-sections are roun , hexagonal, octagonal or quarter octagonal (square with the corners lopped off). The steel may be cut into short pieces for the manufacture of drill bits which fall m headmg 82.07; they are also used in lengths up to five or six metres to transmit ower when drilling at a distance. The hole down the length conducts liquid to the cutting point &othfor lubrication and to minimise the spreading of dust. B
1.- In this Chapter and, in the case of Notes (d), (e) and (f) throughout the Nomenclature, the following expressions have the meanings hereby assigned to them : (a) Pig iron Iron-carbon alloys not usefully malleable, containing more than 2 % by weight of carbon and which may contain by weight one or more other elements within the following limits : - not more than 10 % of chromium - not more than 6 % of manganese - not more than 3 % of phosphorus - not more than 8 % of silicon - a total of not more than 10 % of other elements. (b) Spiegeleisen Iron-carbon alloys containing by weight more than 6 % but not more than 30 % of manganese and otherwise conforming to the specification at (a) above. (c) Ferro-alloys Alloys in pigs, blocks, lumps or similar primary forms, in forms obtained by continuous casting and also in granular or powder forms, whether or not agglomerated, commonly used as an additive in the manufacture of other alloys or as de-oxidants, de-sulphurising agents or for similar uses in ferrous metallurgy and generally not usefully malleable, containing by weight 4 % or more of the element iron and one or more of the following : - more than 10 % of chromium - more than 30 % of manganese - more than 3 % of phosphorus - more than 8 % of silicon - a total of more than 10 % of other elements, excluding carbon, subject to a maximum content of 10 % in the case of copper.