Aluminium Alloy - General Information - EN Standards for Aluminium Extrusions

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Last Datasheet Revision

18 July 2019

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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.

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EN Standards for Aluminium Extrusions

The old BS1474 - 1987 standard has been replaced by a number of EN standards of which the most important are: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 Groups

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 Tolerances - Round Bar

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

Dimensional Tolerances - Square Bar

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

Dimensional Tolerances - Hexagon Bar

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 Tolerance - Rectangular Bars

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

Squareness Tolerances - Rectangular Bar

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

Squareness Tolerances - Square Bars

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

Max Corner Radii - Square Bars

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

Thickness Tolerances for Rectangular Bar - Group I

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

Thickness Tolerances for Rectangular Bar - Group I

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	-	-

Thickness Tolerances for Rectangular Bar-Group II

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

Thickness Tolerances for Rectangular Bar-Group II

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	-	-

Diameter Tolerances for Smls & Porthole Round Tube

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 Tols for Seamless Round Tube

Wall Thickness (mm)	Tolerance Measured at any Point (+/- %)
0.5 to 3.0	10
3.0 to 5.0	9
Over 5.0	8

Tol - Width,Depth,Width A/F for Smls & P/Hole Tube

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

Tol - Width,Depth,Width A/F for Smls & P/Hole Tube

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

Tols on WT for SMLS Tube - other than Round Tube

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

Tols on WT for SMLS Tube - other than Round Tube

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 Tolerances for Porthole Round Tube

Wall Thickness (mm)	Tolerance Measured at Any Point (+/- %)
3.0	7
3.0 to 5.0	6
Over 5.0	5

Tols on WT for P/hole Tube - Other Than Round Tube

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

Tols on WT for P/hole Tube - Other Than Round Tube

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

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