1、June 2008DEUTSCHE NORM English price group 9No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77.150.10!$O 5 000 - 100 0
2、5+07+010+100 200 07+09+012+200 450 08+011+014+450 600 09+012+016+If no fixed or minimum length is specified in the order document, rectangular extruded bars may be delivered in random lengths. The actual lengths and tolerances on random lengths shall be agreed between supplier and purchaser. 3.4 Squ
3、areness of cut ends The squareness of cut ends shall be within half of the fixed length tolerance range (Table 5) for both fixed and random lengths, (e.g. for a fixed length tolerance of 10 0 +mm the squareness of cut ends shall be within 5 mm). DIN EN 755-5:2008-06 EN 755-5:2008 (E) 8 4 Tolerances
4、on form 4.1 Straightness Deviations from straightness, hsand ht,shall be measured as shown in Figure 1 with the rectangular bar placed on a horizontal base plate so that its mass decreases the deviation. For rectangular bars with thickness equal to or greater than 10 mm, the straightness tolerances
5、are specified in Table 6 (The straightness tolerance htapplies to the whole length, e.g. for a length of 6 m the maximum deviation from straightness ht is the value given in the table multiplied by 6 m). For rectangular bars with thickness less than 10 mm, the straightness tolerances shall be agreed
6、 upon between supplier and purchaser. The straightness tolerances apply to rectangular bars in all tempers except O and Tx510. If a straightness tolerance is required for either O or Tx510 temper, it shall be agreed between supplier and purchaser. Key 1 base plate 2 straight edge Figure 1 Measuremen
7、t of deviation from straightness DIN EN 755-5:2008-06 EN 755-5:2008 (E) 9 Table 6 Straightness tolerances Dimensions in millimetres Width W Thickness t Over Up to and including Over Up to and including Maximum deviation from straightness per metre length ht/length mm/m Maximum localized kink in any
8、300 mm portion hs 10 80 10 80 2 1 10 50 2 1 80 120 50 120 3 1,5 10 50 3 1,5 120 180 50 180 4 2 10 50 4 2 180 350 50 240 6 4 350 450 10 240 6 4 450 600 30 120 6 4 4.2 Convexity-Concavity The convexity-concavity shall be measured as shown in Figure 2. The tolerances are specified in Table 7. Key 1 bas
9、e plate Figure 2 Measurement of deviation from flatness DIN EN 755-5:2008-06 EN 755-5:2008 (E) 10 Table 7 Convexity-Concavity tolerances Dimensions in millimetres Width W Over Up to and including Tolerances for convexity-concavity f 10 30 0,2 30 50 0,3 50 80 0,4 80 120 0,6 120 180 0,9 180 240 1,2 24
10、0 350 1,5 350 450 2,0 450 600 2,5 4.3 Twist The twist measurement shall be carried out as shown in Figure 3. The twist tolerances are specified in Table 8. The twist tolerances apply to rectangular bars in all tempers except O and Tx510. If a twist tolerance is required for either O or Tx510 temper,
11、 it shall be agreed between supplier and purchaser. DIN EN 755-5:2008-06 EN 755-5:2008 (E) 11 Key 1 base plate Figure 3 Measurement of twist Table 8 Twist tolerances Dimensions in millimetres Width W Twist tolerances T Over Up to and including per 1 000 mm of length over the total length 10 30 1 3 3
12、0 50 1,5 4 50 120 2 5 120 240 3 8 240 350 4 10 350 450 5 12 450 600 6 14 4.4 Squareness The deviation from square shall be measured as shown in Figure 4. Squareness tolerances are specified in Table 9. DIN EN 755-5:2008-06 EN 755-5:2008 (E) 12 Figure 4 Measurement of deviation from square Table 9 Sq
13、uareness tolerances Dimensions in millimetres Thickness t Over Up to and including Maximum deviation from square Z 2 10 0,1 10 100 0,01 x thickness 100 180 1,0 180 240 1,5 DIN EN 755-5:2008-06 EN 755-5:2008 (E) 13 Bibliography 1 EN 515, Aluminium and aluminium alloys Wrought products Temper designations DIN EN 755-5:2008-06
