GENERAL

Other alloy steel is defined in Note 1 (f) to this Chapter and hollow drill bars and rods in Note 1 (p) to this Chapter.

This sub-Chapter covers alloy steel other than stainless steel in the form of ingots or other primary forms semi-finished products (e.g. blooms billets rounds slabs sheet bars pieces roughly shaped by forging) flat-rolled products whether or not in coils (so-called wide-flats wide coil sheets plates or strip) bars and rods angles shapes or sections or wire.

All these products may be worked provided that they do not thereby assume the character of articles or of products falling in other headings (see the Explanatory Notes to headings 72.06 to 72.17).

The metals most commonly present in other alloy steel are manganese nickel chromium tungsten (wolfram) molybdenum vanadium and cobalt; the most common non-metal additive is silicon. These alloying materials confer special properties to the steel e.g. resistance to shock and wear (e.g. manganese steels); improved electrical qualities (silicon steels); improved tempering qualities (e.g. vanadium steels); or increased cutting speed (e.g. chrome-tungsten steels).

Other alloy steels are used for many purposes requiring special qualities (e.g. durability increased hardness resilience strength) for example in armaments tools and cutlery and machinery.

Alloy steels of this sub-Chapter include :

(1) Alloy engineering and structural steels usually containing the following elements: chromium manganese molybdenum nickel silicon and vanadium.

(2) Alloy steels having improved tensile strength and welding properties containing in particular very small quantities of boron (0.0008 % or more by weight) or of niobium (0.06 % or more by weight).

(3) Alloy steels containing chromium or copper which are weather resistant.

(4) Alloy steels for so-called " magnetic " sheets (having a low magnetic loss) generally containing 3 to 4 % of silicon and possibly aluminium.

(5) Free-cutting alloy steels which not only conform to the requirements of Note 1

(f) but also contain at least one of the following elements : lead sulphur selenium tellurium or bismuth.

(6) Alloy bearing steels (generally containing chromium).

(7) Alloy manganese silicon spring steels (containing manganese silicon and possibly chromium or molybdenum) and other alloy steels for springs.

(8) Non-magnetic alloy steels resistant to shock and abrasion having a high manganese content.

(9) High speed steels : alloy steels containing with or without other alloy elements at least two of the three elements molybdenum tungsten and vanadium with a combined content by weight of 7 % or more 0.6 % or more of carbon and 3 to 6 % of chromium.

(10) Non-distorting tool steels : containing generally by weight 12 % or more of chromium and 2 % or more of carbon.

(11) Other alloy tool steels.

(12) Permanent magnet steels containing aluminium nickel and cobalt.

(13) Non-magnetic alloy steels which are characterised by their manganese or nickel content other than those covered by sub-Chapter III.

(14) Steels for control rods in nuclear reactors (with high boron content).

This sub-Chapter also includes hollow drill bars and rods of alloy or non-alloy steel (heading 72.28).

72.24 - OTHER ALLOY STEEL IN INGOTS OR OTHER PRIMARY FORMS; SEMI-FINISHED PRODUCTS OF OTHER ALLOY STEEL.

72.25 - FLAT-ROLLED PRODUCTS OF OTHER ALLOY STEEL OF A WIDTH OF 600 mm OR MORE (+) .

72.26 - FLAT-ROLLED PRODUCTS OF OTHER ALLOY STEEL OF A WIDTH OF LESS THAN 600 mm (+) .

72.27 - BARS AND RODS HOT-ROLLED IN IRREGULARLY WOUND COILS OF OTHER ALLOY STEEL.

72.28 - OTHER BARS AND RODS OF OTHER ALLOY STEEL; ANGLES SHAPES AND SECTIONS OF OTHER ALLOY STEEL; HOLLOW DRILL BARS AND RODS OF ALLOY OR NON-ALLOY STEEL (+) .

72.29 - WIRE OF OTHER ALLOY STEEL.