Aalco carries over 10,000 stock items covering a wide range of grades/alloys, shapes and sizes, and can cater for all your metal needs - from industry standards to special or bespoke items for particular applications or individual customers.
The old BS1474 - 1987 standard has been replaced by a number of EN standards of which the most important are:
EN754 - Cold drawn rod, bar & tube
EN755 - Hot extruded products
EN12020 - Extruded precision profiles in alloys 6060 & 6063
EN515 - Temper Designations
EN573-1: Numerical alloy designation system
EN573-2: Chemical symbol designation system
EN573-3: Chemical Compositions
EN573-4: Product forms in different alloys
For those familiar with the old BS1474 it is useful to highlight where the new EN standards differ:
• Chemical Compositions – No Change.
• Alloy Numbering System – No Change.
• Temper Designations for Heat Treatable Alloys – A new wider range of special tempers having up to four digits after the T have been introduced for non-standard applications (e.g. T6151).
• Temper Designations for Non Heat Treatable Alloys – No change to existing tempers but a more comprehensive definition of how tempers are achieved.
Soft (O) temper is now classified H111 and an intermediate temper H112 is introduced.
For alloy 5251 tempers are now shown as H32/H34/H36/H38 (equivalent to H22/H24, etc). H19/H22 & H24 are now shown separately.
Chemical Compositions
Please refer to the datasheet entitled Aluminium Specifications.
Mechanical Properties
Please refer to the datasheet entitled Aluminium Specifications.
Note that for the purposes of tolerances the alloys are split into two groups:
• Group I – 1000 series, 3000 series, 6000 series, 5005, 5051, 5251
• Group II – 2000 series, 7000 series, 5052, 5154, 5454, 5754, 5083, 5086
| Alloy Group I |
| 1050, 1070, 1200, 1350, 3102, 3003, 3103 |
| 5005, 5005A, 5051A, 5251 |
| 6101A, 6101B, 6005, 6005A, 6106, 6008, 6010A, 6012, 6014, 6018, 6023, 6351, 6060, 6360, |
| 6061, 6261, 6262, 6262A, 6063, 6063A, 6463, 6065, 6081, 6082, 6182 |
| Alloy Group II |
| 2007, 2011, 2011A, 2014, 2014A, 2017A, 2024, 2030 |
| 5019, 5049, 5052, 5154A, 5454, 5754, 5083, 5086 |
| 7003, 7005, 7108, 7108A, 7020, 7021, 7022, 7049A, 7075 |
| Diameter mm | Tolerances mm (+/-) | Tolerances mm (+/-) |
| Group I | Group II | |
| 8 to 18 | 0.22 | 0.30 |
| 19 to 25 | 0.25 | 0.35 |
| 26 to 40 | 0.30 | 0.40 |
| 41 to 50 | 0.35 | 0.45 |
| 51 to 65 | 0.40 | 0.50 |
| 66 to 80 | 0.45 | 0.70 |
| 81 to 100 | 0.55 | 0.90 |
| 101 to 120 | 0.65 | 1.0 |
| 121 to 150 | 0.80 | 1.2 |
| 151 to 180 | 1.0 | 1.4 |
| 181 to 220 | 1.15 | 1.7 |
| 221 to 270 | 1.3 | 2.0 |
| 271 to 320 | 1.6 | 2.5 |
| Width Across Flats (mm) | Tolerances mm (+/-) | Tolerances mm (+/-) |
| Group I | Group II | |
| 10 to 18 | 0.22 | 0.30 |
| 19 to 25 | 0.25 | 0.35 |
| 26 to 40 | 0.30 | 0.40 |
| 41 to 50 | 0.35 | 0.45 |
| 51 to 65 | 0.40 | 0.50 |
| 66 to 80 | 0.45 | 0.70 |
| 81 to 100 | 0.55 | 0.90 |
| 101 to 120 | 0.65 | 1.0 |
| 121 to 150 | 0.80 | 1.2 |
| 151 to 180 | 1.0 | 1.4 |
| 181 to 220 | 1.15 | 1.7 |
| Width Across Flats (mm) | Tolerances mm (+/-) | Tolerances mm (+/-) |
| Group I | Group II | |
| 10 to 18 | 0.22 | 0.30 |
| 19 to 25 | 0.25 | 0.35 |
| 26 to 40 | 0.30 | 0.40 |
| 41 to 50 | 0.35 | 0.45 |
| 51 to 65 | 0.40 | 0.50 |
| 66 to 80 | 0.50 | 0.70 |
| 81 to 100 | 0.55 | 0.90 |
| 101 to 120 | 0.65 | 1.0 |
| 121 to 150 | 0.80 | 1.2 |
| 151 to 180 | 1.0 | 1.4 |
| 181 to 220 | 1.15 | 1.7 |
| Width Across Flats (mm) | Tolerances mm (+/-) | Tolerances mm (+/-) |
| Group I | Group II | |
| 10 to 18 | 0.25 | 0.35 |
| 19 to 30 | 0.30 | 0.40 |
| 31 to 50 | 0.40 | 0.50 |
| 51 to 80 | 0.60 | 0.70 |
| 81 to 120 | 0.80 | 1.0 |
| 121 to 180 | 1.0 | 1.4 |
| 181 to 240 | 1.4 | 1.8 |
| 241 to 350 | 1.8 | 2.2 |
| 351 to 450 | 2.2 | 2.8 |
| 451 to 600 | 3.0 | 3.5 |
| Width Across Flats (mm) | Max Deviation from Square (mm) |
| 2 to 10 | 0.1 |
| 11 to 100 | 0.01 x Width Across Flats |
| 101 to 180 | 1.0 |
| 181 to 240 | 1.5 |
| Width Across Flats (mm) | Max Deviation from Square (mm) |
| 10 to 100 | 0.01 x Width across Flats |
| 101 to 180 | 1.0 |
| 181 to 220 | 1.5 |
| Width Across Flats (mm) | Tolerances mm (+/-) | Tolerances mm (+/-) |
| Group I | Group II | |
| 10 to 25 | 1.0 | 1.5 |
| 26 to 50 | 1.5 | 2.0 |
| 51 to 80 | 2.0 | 3.0 |
| 81 to 120 | 2.5 | 3.0 |
| 121 to 180 | 2.5 | 4.0 |
| 181 to 220 | 3.5 | 5.0 |
| Width Across Flats (mm) | Tols +/- | Tols +/- | Tols +/- | Tols +/- | Tols +/- |
| 2-6mm | 6.1 - 10mm | 10.1-18mm | 19-30mm | 31-50mm | |
| 10 to 18 | 0.20 | 0.25 | 0.25 | - | - |
| 19 to 30 | 0.20 | 0.25 | 0.30 | 0.3 | - |
| 31 to 50 | 0.25 | 0.25 | 0.30 | 0.35 | 0.4 |
| 51 to 80 | 0.25 | 0.30 | 0.35 | 0.40 | 0.5 |
| 81 to 120 | 0.30 | 0.35 | 0.40 | 0.45 | 0.6 |
| 121 to 180 | 0.40 | 0.45 | 0.50 | 0.55 | 0.6 |
| 181 to 240 | - | 0.55 | 0.60 | 0.65 | 0.7 |
| 241 to 350 | - | 0.65 | 0.70 | 0.75 | 0.8 |
| 351 to 450 | - | - | 0.80 | 0.85 | 0.9 |
| 451 to 600 | - | - | - | - | 0.9 |
| Width Across Flats (mm) | Tols +/- | Tols +/- | Tols +/- | Tols +/- |
| 51-80mm | 81-120mm | 121-180mm | 181-240mm | |
| 10 to 18 | - | - | - | - |
| 19 to 30 | - | - | - | - |
| 31 to 50 | - | - | - | - |
| 51 to 80 | 0.6 | - | - | - |
| 81 to 120 | 0.7 | 0.8 | - | - |
| 121 to 180 | 0.7 | 0.9 | 1.0 | - |
| 181 to 240 | 0.8 | 1.0 | 1.2 | 1.4 |
| 241 to 350 | 0.9 | 1.1 | 1.3 | 1.5 |
| 351 to 450 | 1.0 | 1.2 | 1.4 | 1.6 |
| 451 to 600 | 1.0 | 1.4 | - | - |
| Width Across Flats (mm) | Tols +/- | Tols +/- | Tols +/- | Tols +/- | Tols +/- |
| 2-6mm | 6.1-10mm | 10.1-18mm | 19-30mm | 31-50mm | |
| 10 to 18 | 0.25 | 0.30 | 0.35 | - | - |
| 19 to 30 | 0.25 | 0.30 | 0.40 | 0.40 | - |
| 31 to 50 | 0.30 | 0.30 | 0.40 | 0.5 | 0.5 |
| 51 to 80 | 0.30 | 0.35 | 0.45 | 0.6 | 0.7 |
| 81 to 120 | 0.35 | 0.40 | 0.5 | 0.6 | 0.7 |
| 121 to 180 | 0.45 | 0.50 | 0.55 | 0.7 | 0.8 |
| 181 to 240 | - | 0.60 | 0.65 | 0.7 | 0.9 |
| 241 to 350 | - | 0.70 | 0.75 | 0.8 | 0.9 |
| 351 to 450 | - | - | 0.9 | 1.0 | 1.1 |
| 451 to 600 | - | - | - | - | 1.2 |
| Width Across Flats (mm) | Tols +/- | Tols +/- | Tols +/- | Tols +/- |
| 51-80mm | 81-120mm | 121-180mm | 181-240mm | |
| 10 to18 | - | - | - | - |
| 19 to 30 | - | - | - | - |
| 31 to 50 | - | - | - | - |
| 51 to 80 | 0.7 | - | - | - |
| 81 to 120 | 0.8 | 1.0 | - | - |
| 121 to 180 | 1.0 | 1.1 | 1.4 | - |
| 181 to 240 | 1.1 | 1.3 | 1.6 | 1.8 |
| 241 to 350 | 1.2 | 1.4 | 1.7 | 1.9 |
| 351 to 450 | 1.4 | 1.8 | 2.1 | 2.3 |
| 451 to 600 | 1.4 | 1.8 | - | - |
| Diam. (mm) OD or ID | Max Deviation of Mean Diam. | Max Dev. at Any Point mm | Max Dev. at Any Point mm | Max Dev. at Any Point mm |
| mm (+/-) | Not Annealed or Heat Treated | Heat-Treated | Annealed | |
| 8 to 18 | 0.25 | 0.4 | 0.6 | 1.5 |
| 19 to 30 | 0.30 | 0.5 | 0.7 | 1.8 |
| 31 to 50 | 0.35 | 0.6 | 0.9 | 2.2 |
| 51 to 80 | 0.40 | 0.7 | 1.1 | 2.6 |
| 81 to 120 | 0.60 | 0.9 | 1.4 | 3.6 |
| 121 to 200 | 0.90 | 1.4 | 2.0 | 5.0 |
| 201 to 350 | 1.4 | 1.9 | 3.0 | 7.6 |
| 351 to 450 | 1.9 | 2.8 | 4.0 | 10.0 |
| Wall Thickness (mm) | Tolerance Measured at any Point (+/- %) |
| 0.5 to 3.0 | 10 |
| 3.0 to 5.0 | 9 |
| Over 5.0 | 8 |
| Width, Depth or Width A/F | Ovality Tols (+/-mm) | Ovality Tols (+/-mm) | Ovality Tols (+/-mm) | Ovality Tols (+/-mm) |
| Group I 0 to 100mm | Group I 101 to 200 | Group I 201 to 300 | Group I 301 to 350 | |
| Up to 10 | 0.25 | 0.30 | 0.35 | 0.40 |
| 11 to 25 | 0.30 | 0.40 | 0.50 | 0.60 |
| 26 to 50 | 0.50 | 0.60 | 0.80 | 0.90 |
| 51 to 100 | 0.70 | 0.90 | 1.10 | 1.30 |
| 101 to 150 | - | 1.10 | 1.30 | 1.50 |
| 151 to 200 | - | 1.30 | 1.50 | 1.80 |
| 201 to 300 | - | - | 1.70 | 2.10 |
| 301 to 350 | - | - | - | 2.80 |
| Width, Depth or Width A/F | Ovality Tols (+/-mm | Ovality Tols (+/-mm | Ovality Tols (+/-mm | Ovality Tols (+/-mm |
| Group II 0 to 100mm | Group II 101 to 200mm | Group II 201 to 300mm | Group II 301 to 350mm | |
| Up to 10 | 0.40 | 0.50 | 0.55 | 0.60 |
| 11 to 25 | 0.50 | 0.70 | 0.80 | 0.90 |
| 26 to 50 | 0.80 | 0.90 | 1.0 | 1.20 |
| 51 to 100 | 1.0 | 1.20 | 1.30 | 1.60 |
| 101 to 150 | - | 1.50 | 1.70 | 1.80 |
| 151 to 200 | - | 1.90 | 2.20 | 2.40 |
| 201 to 300 | - | - | 2.50 | 2.80 |
| 301 to 350 | - | - | - | 3.50 |
| Wall Thickness (mm) | Tols (+/-mm) for given Circumscribing Circle | Tols (+/-mm) for given Circumscribing Circle | Tols (+/-mm) for given Circumscribing Circle |
| Up to 100mm Group I | 101 to 300mm Group I | 301 to 350mm Group I | |
| 0.5 to 1.5 | 0.25 | 0.35 | - |
| 1.51 to 3.0 | 0.30 | 0.50 | 0.75 |
| 3.1 to 6.0 | 0.50 | 0.75 | 1.0 |
| 6.1 to 10 | 0.75 | 1.0 | 1.2 |
| 11 to 15 | 1.0 | 1.2 | 1.5 |
| 16 to 20 | 1.5 | 1.9 | 2.0 |
| 31 to 30 | 1.9 | 2.2 | 2.5 |
| 31 to 40 | - | 2.5 | 2.7 |
| Wall Thickness (mm) | Tols (+/-mm) for given Circumscribing Circle | Tols (+/-mm) for given Circumscribing Circle | Tols (+/-mm) for given Circumscribing Circle |
| Up to 100mm Group II | 101 to 300mm Group II | 301 to 350mm Group II | |
| 0.5 to 1.5 | 0.35 | 0.50 | - |
| 1.51 to 3.0 | 0.45 | 0.65 | 0.9 |
| 3.1 to 6.0 | 0.60 | 0.90 | 1.2 |
| 6.1 to 10 | 1.0 | 1.3 | 1.5 |
| 11 to 15 | 1.3 | 1.7 | 1.9 |
| 16 to 20 | 1.9 | 2.2 | 2.5 |
| 21 to 30 | 2.2 | 2.7 | 3.1 |
| 31 to 40 | - | - | - |
| Wall Thickness (mm) | Tolerance Measured at Any Point (+/- %) |
| 3.0 | 7 |
| 3.0 to 5.0 | 6 |
| Over 5.0 | 5 |
| Wall Thickness (mm) | Tols (+/-mm) for given Circumscribing Circle | Tols (+/-mm) for given Circumscribing Circle | Tols (+/-mm) for given Circumscribing Circle |
| Up to 100mm Group I | 101 to 300mm Group I | 301 to 350mm Group I | |
| 0.5 to 1.5 | 0.20 | 0.30 | - |
| 1.51 to 3.0 | 0.25 | 0.40 | 0.60 |
| 3.1 to 6.0 | 0.40 | 0.60 | 0.80 |
| 6.1 to 10.0 | 0.60 | 0.80 | 1.0 |
| 11 to 15 | 0.80 | 1.0 | 1.2 |
| 16 to 20 | 1.2 | 1.5 | 1.7 |
| 21 to 30 | 1.5 | 1.8 | 2.0 |
| 31 to 40 | - | 2.0 | 2.0 |
| Wall Thickness (mm) | Tols (+/-mm) for given Circumscribing Circle | Tols (+/-mm) for given Circumscribing Circle | Tols (+/-mm) for given Circumscribing Circle |
| Up to 100mm Group II | 101 to 300mm Group II | 301 to 350mm Group II | |
| 0.5 to 1.5 | 0.30 | 0.40 | - |
| 1.51 to 3.0 | 0.35 | 0.50 | 0.70 |
| 3.1 to 6.0 | 0.55 | 0.70 | 0.90 |
| 6.1 to 10 | 0.75 | 1.0 | 1.2 |
| 11 to 15 | 1.0 | 1.3 | 1.5 |
| 16 to 20 | 1.5 | 1.8 | 2.0 |
| 21 to 30 | 1.8 | 2.2 | 2.5 |
| 31 to 40 | - | 2.5 | 3.0 |
This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.
Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.
The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers' data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.
Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.
As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied.
Advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. All transactions are subject to the Company's current Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.
