Machinery's Handbook, 31st Edition
534 WROUGHT ALUMINUM AND ALUMINUM ALLOYS A system of four-digit numerical designations for wrought aluminum and wrought alu minum alloys was adopted by the Aluminum Association in 1954. This system is used by the commercial producers and is similar to that used by the SAE, the difference being the addition of two prefix letters. The first digit of the designation identifies the alloy type: 1) indicating an aluminum of 99.00 percent or greater purity; 2) copper; 3) manganese; 4) silicon; 5) magnesium; 6) magnesium and silicon; 7) zinc; 8) some element other than those aforementioned; and 9) unused (not assigned at present). If the second digit in the designation is zero, it indicates that there is no special control on individual impurities; integers 1 through 9 indicate special control on one or more individual impurities. In the 1000 series group for aluminum of 99.00 percent or greater purity, the last two of the four digits indicate to the nearest hundredth the amount of aluminum above 99.00 percent. Thus designation 1030 indicates 99.30 percent minimum aluminum. In the 2000 to 8000 series groups, the last two of the four digits have no significance but are used to identify different alloys in the group. At the time of adoption of this designation system, most of the existing commercial designation numbers were used for these last two digits; for example, 14S became 2014, 3S became 3003, and 75S became 7075. When new alloys are developed and are commercially used, these last two digits are assigned consecutively beginning with -01, skipping any numbers previously assigned at the time of initial adoption. Experimental alloys are also designated in accordance with this system, but they are indicated by the prefix X, which is dropped upon standardization. Table 7a shows the product forms and nominal compositions of common wrought alumi num alloys, and Table 7b lists typical mechanical properties of wrought aluminum alloys. Table 7a. Nominal Compositions of Common Wrought Aluminum Alloys Alloy Alloying Elements — Aluminum and Normal Impurities Constitute Remainder Si Cu Mn Mg Cr Ni Zn Ti Pb Bi V Z Fe 1050 99.50 percent minimum aluminum 1060 99.60 percent minimum aluminum 1100 0.12 99.00 percent minimum aluminum 1145 99.45 percent minimum aluminum 1175 99.75 percent minimum aluminum 1200 99.00 percent minimum aluminum 1230 99.30 percent minimum aluminum 1235 99.35 percent minimum aluminum 1345 99.45 percent minimum aluminum 1350 a 99.50 percent minimum aluminum 2011 5.5 0.4 0.4 2014 0.8 4.4 0.8 0.50 2017 0.50 4.0 0.7 0.6 2018 4.0 0.7 2.0 2024 4.4 0.6 1.5 2025 0.8 4.4 0.8 2036 2.6 0.25 0.45 2117 2.6 0.35 2124 4.4 0.6 1.5 2218 4.0 1.5 2.0 2219 6.3 0.30 0.06 0.10 0.18 2319 6.3 0.30 0.15 0.10 0.18 2618 0.18 2.3 1.6 1.0 0.07 1.1
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