Proc. 7529 Title 3--The President ANNEX (continued) 4 layers, the first layer conststmg by weight of 99 percent zinc, 0.5 percent cobalt, and 0.5 percent molybdenum, followed by a layer consisting of chromate, and finally a layer consisting of silicate; ( H ) products described In industry usage as of carbon steel, measuring 1.84 mm \177n thickness and 43.6 mm or 16 I mm in w\177dth, consisting of carbon steel cod (SAE 1008) clad w\177th an aluminum alloy that contains by weight 20 percent tin, I percent copper. 0.3 percent s\177licon. 0.15 percent mckel and less than I percent \177n the aggregate other matermls and meeting the reqmrements of SAE standard 783 for Bearmg and Bushing Alloys; (1) products described in industry usage as of carbon steel, measunng 0.97 mm in thickness and 20 mm in width, conststmg of carbon steel coil (SAE 1008) with a two-layer lining, the first layer consisting of a copper-lead alloy powder that contains by weight 9 percent or more but not more than I 1 percent of tin, 9 percent or more but not more than 11 percent of lead, less than 1 percent of zinc and less than I percent m the aggregate of other materials and meeting the requirements of SAE standard 792 for Bearing and Bushing Alloys, w\177th the second layer consisting by weight of 45 percent or more but not more than 55 percent of lead, 38 percent or more but not more than 50 percent of PTFE, 3 percent or more but not more than 5 percent of molybdenum disulfide and less than 2 percent in the aggregate of other nralermls; and (J) corrosion-resistant products, described in industry usage as of carbon steel, comprising deep-drawing carbon steel strtp, roll-clad on both sides with aluminum (AISi) foils in accordance with St3 LG as to EN 10139/10140, wtth a chemical composition encompassing a core material of U St 23 (continuous casting) contaimng by weight less than 0.08 percent of carbon, less than 0.30 percent of manganese, less than 0.20 percent of phosphorus, less than 0.015 percent of sulfur and less than 0.01 percent of aluminum, and the cladding material containing by wetght a minimum of 99 percent of aluminum with sihcon/copper/\177ron of less than I percent, the foregoing products in strips w\177th thicknesses of 0.07 mm to 4.0 mm Iraelusive) and widths of 5 mm to 800 mm (inclusive), with a thickness ratio of aluminum on either side of steel ranging from 3 percent/94 percentJ3 percent to It) percent/80 percent/10 percent; (viii) flat-rolled products designated as X-508, as provided below: (A) shadow mask steel, comprising aluminum killed cold-rolled steel coil that is open coil annealed, has an ultra-flat, isotropic surface, having a thickness from 0.025 to 0.0254 ram, inclusive, and a width from 381 to 813 mm, inclusive, and with a carbon content of less than 0.002 percent, by weight; (B) flapper valve steel, hardened and tempered, surface polished, measuring in thickness less than or equal to 1.0 mm and in w\177dth less than or equal to 152.4 mm, containing by weight a carbon content greater than or equal to 0.90 percent and less than or equal to 1.05 percent, a sdmon content greater than or equal to O. 15 percent and less than or equal to 0.35 percent, u magnesmm content greater than or equal to 0.30 percent and less than or equal to 0.50 percent, a phosphorus content of less than or equal to 0.03 percent and a sulfur content less than or equal to 0.006 percent, the foregoing having a tensile strength greater than or equal to 162 kgf/mm 2 and hardness greater than or equal to 475 Vickers hardness number, having flatness less than 0.2 percent of nominal strip width, completely free from decarbunzat\177on, spheroidal and fine within I percent to 4 percent (area percentage) and undissolved in the uniform tempered martensure, having non-metallic sulfide inclusion with area percentage less than or equal to 0.04 percent and oxide inclusion with area percentage less than or equal to 0.05 percent, having a compresswe stress of 10 to 40 Kgf/mm2; having the following surface roughness specifications: if thickness is less than or equal to 0.209 mm, will have roughness (RZ) less than or equal to 0.5 micrometer; if thickness is greater than 0.209 mm but less than or equal to 0.310 mnr, will have roughness (RZ) of less than or equal to 0.6 micrometer; if thickness \177s greater than 0.310 mm but less than or equal to 0.440 mm, will have roughness (RZ) less than or equal to 0.7 micrometer; if thtckness is greater than 0.440 24
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