BS EN 573-3 pdf free download

BS EN 573-3 pdf free download. Aluminium and aluminium alloys — Chemical composition and form of wrought products — Part 3: Chemical composition.
2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendements). EN 573-1 , Aluminium and aluminium alloys – Chemical composition and form of wrought products – Part 1 : Numerical designation system. EN 573-2, Aluminium and aluminium alloys – Chemical composition and form of wrought products – Part 2: Chemical symbol based designation system. EN 573-4:1 994, Aluminium and aluminium alloys – Chemical composition and form of wrought products – Part 4: Forms of products. 3 Chemical composition limits The chemical composition of aluminium and aluminium alloys is specified in percentage by mass in Tables 1 to 8. Limits are expressed as a maximum unless shown as a range or a minimum. Aluminium is specified as a minimum for unalloyed aluminium, and as a remainder for aluminium alloys. Except for “aluminium” and “others”, analysis is normally made for elements for which specific limits are shown. Tables 1 to 8 shall be updated made according to the procedure specified in annex A. 4.2 The aluminium content for unalloyed aluminium made by a refining process is the difference between 1 00,00 % 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 1 00,00 % and the sum of all other metallic elements present in amounts of 0,01 0 % or more each expressed to the second decimal place before determining the sum. 5 Alloy designations The four-figure numerical and the alternative chemical symbol based alloy designation systems are specified respectively in EN 573-1 and EN 573-2. Both the four figure and the chemical symbol based designations are indicated in Tables 1 to 8. The International four figure system is the preferred one. The chemical symbol based designations are indicated for reference only. 6 Sequence of elements Standard limits for alloying elements and impurities are expressed in the following sequence: silicon, iron, copper, manganese, magnesium, chromium, nickel, zinc, titanium, gallium, vanadium, etc., other elements each, other elements total, aluminium. Additional specified elements having limits are inserted in alphabetical order of their chemical symbols between zinc and titanium, or are specified in footnotes in Tables 1 to 8 and listed in clause 8. 7 Rounding rules for determination of compliance 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 4.2. 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. 8 Footnotes to Tables 1 to 8 1 The sum of those “Others” metallic elements 0,01 0 % or more each, expressed to the second decimal place before determining the sum. 2 The aluminium content for unalloyed aluminium not made by a refining process is the difference between 1 00,00 % and the sum of all other metallic elements present in amounts of 0,01 0 % or more each, expressed to the second decimal place before determining the sum. 3 The aluminium content for unalloyed aluminium made by a refining process is the difference between 1 00,00 % and the sum of all other metallic elements present in amounts of 0,001 0 % or more each, expressed to the third decimal before determining the sum, which is rounded to the second decimal place before subtracting.BS EN 573-3  pdf download.