BS EN 573-3:2019 pdf free.Aluminium and aluminium alloys -Chemical composition and form of wrought products.
The chemical composition of aluminium and aluminium alloys is specified in percentage by mass in Tables 1 to 8. Limits of impurities are expressed as a maximum; limits of alloying elements shown as a range. Aluminium is specified as a minimum for unalloyed aluminium, and as a remainder for aluminium alloys. The chemical composition of internationally registered wrought aluminium and wrought aluminium alloys not listed in this document can be found in Teal sheet [1]. Analysis shall be made for elements which are specified, for example Pb, Sn, Bi, Sb, Zr.The aluminium content for unalloyed aluminium made by a refining process is the difference between 100,00 % and the sum of all other metallic elements present in amounts of 0,001 0 % or more each, expressed to the third decimal place before determining the sum, which is rounded to the second decimal place before subtracting. For unalloyed aluminium not made by a refining process, the aluminium content is the difference between 100,00 % and the sum of all other metallic elements present in amounts of 0,010 % or more each expressed to the second decimal place before determining the sum.The numerical designation systems used in Teal sheets and European Standards for wrought aluminium alloys are identical. As specified in EN 573-1 [3] the prefix EN AW- is added. The alternative chemical symbol based alloy designation system shall be based on EN 573-2. Both the numerical and the chemical symbol based designations are indicated in Tables 1 to 8. The International numerical system is the preferred one. The chemical symbol based designations are indicated for reference only.In recording chemical analysis test results, the number representing the result for any element specified in this standard shall be expressed to the same number of decimal places as the corresponding number in this standard. For unalloyed aluminium, the aluminium content is derived as described in 5.2. The following rounding rules shall be used for determination of compliance with this standard: a) when the figure immediately after the last figure to be retained is less than 5, the last figure to be retained remains unchanged; b) when the figure immediately after the last figure to be retained is greater than 5, or equal to 5 and followed by at least one figure other than zero, the last figure to be retained is increased by one; c) when the figure immediately after the last figure to be retained is equal to 5 and followed by zeros only, the last figure to be retained remains unchanged if even and is increased by one if odd.BS EN 573-3 pdf download.