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Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:34, Uncontrolled Copy, (c) The British Standards Institution 2013 BRITISH STANDARD Aluminium and aluminium alloys — Cold drawn rod/bar and tube — Part 5: Rectangular bars, tolerances on dimensions and form ICS 77.150.10 12&23 000 ≥5 100 +5 +7 + 10 100 200 +7 +9 + 12 If no fixed or minimum length is specified in the order document, rectangular drawn bars may be delivered in random lengths The actual lengths and tolerances on random lengths shall be agreed between supplier and purchaser 3.4 Squareness 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 4.1 + 10 mm the squareness of cut ends shall be within mm) Tolerances on form Straightness Deviations from straightness, hs and ht, shall be measured as shown in Figure with the rectangular bar placed on a horizontal base plate so that its mass decreases the deviation BS EN 754-5:2008 Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:34, Uncontrolled Copy, (c) The British Standards Institution 2013 EN 754-5:2008 (E) For rectangular bars with thickness equal to or greater than mm, the straightness tolerances are specified in Table (The straightness tolerance ht applies to the whole length, e.g for a length of m the maximum deviation from straightness ht is the value given in the table multiplied by m) For rectangular bars with thickness less than mm, the straightness tolerances shall be agreed upon between supplier and purchaser The straightness tolerances apply to rectangular bars in all tempers except O and Tx51 If a straightness tolerance is required for either O or Tx51 temper, it shall be agreed between supplier and purchaser Key base plate straight edge Figure — Measurement of deviation from straightness Table — Straightness tolerances Dimensions in millimetres Over Up to and including Maximum deviation from straightness per metre length ht/length mm/m ≥6 40 0,6 40 60 1,0 ≥6 40 1,0 40 60 1,5 With W 4.2 Thickness t Over Up to and including ≥6 120 120 200 Maximum localized kink in any 300 mm portion hs Convexity - Concavity The convexity - concavity shall be measured as shown in Figure The tolerances are specified in Table 7 BS EN 754-5:2008 Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:34, Uncontrolled Copy, (c) The British Standards Institution 2013 EN 754-5:2008 (E) Key base plate Figure — Measurement of deviation from flatness Table — Convexity - Concavity tolerances Dimensions in millimetres Width W 4.3 Flatness tolerances f Over Up to and including ≥5 30 0,10 30 50 0,15 50 80 0,20 80 120 0,30 120 200 0,50 Twist The twist measurement shall be carried out as shown in Figure The twist tolerances are specified in Table For rectangular bars with width less than 10 mm, the twist tolerances shall be agreed between supplier and purchaser The twist tolerances apply to bars in all tempers except O and Tx51 If a twist tolerance is required for either O or Tx51 temper, it shall be agreed between supplier and purchaser BS EN 754-5:2008 Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:34, Uncontrolled Copy, (c) The British Standards Institution 2013 EN 754-5:2008 (E) Key base plate Figure — Measurement of twist Table — Twist tolerances Dimensions in millimetres With W 4.4 Twist tolerances T Over Up to and including per 000 mm of length over the total length ≥ 10 30 1,0 30 50 1,5 50 120 2,0 120 200 3,0 Squareness The deviation from square shall be measured as shown in Figure Squareness tolerances are specified in Table 9 BS EN 754-5:2008 Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:34, Uncontrolled Copy, (c) The British Standards Institution 2013 EN 754-5:2008 (E) Figure — Measurement of deviation from square Table — Squareness tolerances Dimensions in millimetres Thickness t 10 From Up to and including Maximum deviation from square Z 60 0,005 x thickness t Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:34, Uncontrolled Copy, (c) The British Standards Institution 2013 BS EN 754-5:2008 EN 754-5:2008 (E) Bibliography [1] EN 515, Aluminium and aluminium alloys — Wrought products — Temper designations 11 Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:34, Uncontrolled Copy, (c) The British Standards Institution 2013 BS EN 754-5:2008 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of 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