STANDARD TOLERANCES
EXTRUDED TUBE
DIAMETER
Allowable deviation of mean diameter from specified diameter (size)
Tolerance, Inches plus and minus
Specified diameter Inches | Alloys 5083, 5086, 5454 | Other alloys |
 Difference between 1/2 (AA+BB) and specified diameter |
0.500- 0.999 | 0.015 | 0.010 | |
1.000- 1.999 | 0.018 | 0.012 | |
2.000- 3.999 | 0.023 | 0.015 | |
4.000- 5.999 | 0.038 | 0.025 | |
6.000- 7.999 | 0.053 | 0.035 | |
8.000- 9.999 | 0.068 | 0.045 | |
10.000-11.999 | 0.083 | 0.055 | |
12.000-13.999 | 0.098 | 0.065 | |
14.000-15.999 | 0.113 | 0.075 | |
16.000-17.999 | 0.128 | 0.085 |
Allowable deviation of diameter at any point from specified diameter (size)
Tolerance, Inches plus and minus
Specified diameter Inches | Alloys 5083, 5086, 5454 | Other alloys |  Difference between AA+BB and specified diameter |
0.500- 0.999 | 0.030 | 0.020 | |
1.000- 1.999 | 0.038 | 0.025 | |
2.000- 3.999 | 0.045 | 0.030 | |
4.000- 5.999 | 0.075 | 0.050 | |
6.000- 7.999 | 0.113 | 0.075 | |
8.000- 9.999 | 0.150 | 0.100 | |
10.000-11.999 | 0.188 | 0.125 | |
12.000-13.999 | 0.225 | 0.150 | |
14.000-15.999 | 0.263 | 0.175 | |
16.000-17.999 | 0.300 | 0.200 |
STANDARD TOLERANCES
EXTRUDED TUBE
WIDTH AND DEPTH
Allowable deviation of width or depth
at corners from specified width or depth
at corners from specified width or depth
Tolerance, Inches pluse and minus
square, rectangular
square, rectangular
Specified width or depth Inches | Alloys 5083, 5086, 5454 | Other alloys |
0.500- 0.749 | 0.018 | 0.012 |
0.750- 0.999 | 0.021 | 0.014 |
1.000- 1.999 | 0.027 | 0.018 |
2.000- 3.999 | 0.038 | 0.025 |
4.000- 4.999 | 0.053 | 0.035 |
5.000- 5.999 | 0.068 | 0.045 |
6.000- 6.999 | 0.083 | 0.055 |
7.000- 7.999 | 0.098 | 0.065 |
8.000- 8.999 | 0.113 | 0.075 |
9.000- 9.999 | 0.128 | 0.085 |
10.000-10.999 | 0.143 | 0.095 |
11.000-12.000 | 0.158 | 0.105 |
 |  |
Difference between AA and specified width or depth | |
STANDARD TOLERANCES
EXTRUDED TUBE
WIDTH AND DEPTH
Allowable deviation of width or depth
not at corners from specified width or depth
not at corners from specified width or depth
Tolerance, Inches plus and minus
Specified | Square hexagonal, octagonal | Rectangular All Alloys | |
Alloys 5083, 5086, 5454 | Other alloys | ||
0.500- 0.749 | 0.030 | 0.020 | The tolerance for the width is the value in the previous column for a dimension equal to the depth and conversely, but in no case is the tolerance less than at the corners. Example: The width tolerance of a 1 x 3 inch alloy 6061 rectangular tube is ±0.025 inch and the depth tolerance ±0.035 inch. |
0.750- 0.999 | 0.030 | 0.020 | |
1.000- 1.999 | 0.038 | 0.025 | |
2.000- 3.999 | 0.053 | 0.035 | |
4.000- 4.999 | 0.068 | 0.045 | |
5.000- 5.999 | 0.083 | 0.055 | |
6.000- 6.999 | 0.098 | 0.065 | |
7.000- 7.999 | 0.108 | 0.075 | |
8.000- 8.999 | 0.123 | 0.085 | |
9.000- 9.999 | 0.143 | 0.095 | |
10.000-10.999 | 0.158 | 0.105 | |
11.000-12.000 | 0.173 | 0.115 | |
 |  |  |
Difference between AA and specified width, depth or distance across flat | ||
STANDARD TOLERANCES
EXTRUDED TUBE
Allowable deviation of
mean wall thickness from specified wall thickness
mean wall thickness from specified wall thickness
Tolerance, Inches plus and minus
Specified wall thickness Inches | Under 1,250 | 1,250 – 2,999 | Outside diameter Inches  Difference between 1/2 (AA + BB) and specified wall thickness | ||
Alloys 5083, 5086, 5654 | Other alloys | Alloys 5083, 5086, 5454 | Other alloys | ||
Under 0.047 | 0.009 | 0.006 | — | — | |
0.047-0.061 | 0.011 | 0.007 | 0.012 | 0.008 | |
0.062-0.077 | 0.012 | 0.008 | 0.012 | 0.008 | |
0.078-0.124 | 0.014 | 0.009 | 0.014 | 0.009 | |
0.125-0.249 | 0.014 | 0.009 | 0.014 | 0.009 | |
0.250-0.374 | 0.017 | 0.011 | 0.017 | 0.011 | |
0.375-0.499 | — | — | 0.023 | 0.015 | |
0.500-0.749 | — | — | 0.030 | 0.020 | |
0.750-0.999 | — | — | — | — | |
1.000-1.499 | — | — | — | — | |
1.500-2.000 | — | — | — | — | |
2.001-2.499 | — | — | — | — | |
2.500-2.999 | — | — | — | — | |
3.000-3.499 | — | — | — | — | |
3.500-4.000 | — | — | — | — | |
Specified wall thickness Inches | 3,000 – 4,999 | 5,000 and over | |||
Alloys 5083, 5086, 5654 | Other alloys | Alloys 5083, 5086, 5454 | Other alloys | ||
Under 0.047 | — | — | — | — | |
0.047-0.061 | 0.012 | 0.008 | 0.015 | 0.010 | |
0.062-0.077 | 0.014 | 0.009 | 0.018 | 0.012 | |
0.078-0.124 | 0.015 | 0.010 | 0.023 | 0.015 | |
0.125-0.249 | 0.020 | 0.013 | 0.030 | 0.020 | |
0.250-0.374 | 0.024 | 0.016 | 0.038 | 0.025 | |
0.375-0.499 | 0.032 | 0.021 | 0.053 | 0.035 | |
0.500-0.749 | 0.042 | 0.028 | 0.068 | 0.045 | |
0.750-0.999 | 0.053 | 0.035 | 0.083 | 0.055 | |
1.000-1.499 | 0.068 | 0.045 | 0.098 | 0.065 | |
1.500-2.000 | — | — | 0.113 | 0.075 | |
2.001-2.499 | — | — | 0.128 | 0.085 | |
2.500-2.999 | — | — | 0.143 | 0.095 | |
3.000-3.499 | — | — | 0.158 | 0.105 | |
3.500-4.000 | — | — | 0.173 | 0.115 | |
STANDARD TOLERANCES
EXTRUDED TUBE
WALL THICKNESS
Allowable deviation of
mean wall thickness from specified wall thickness
mean wall thickness from specified wall thickness
Tolerance, Inches plus and minus
All alloys |
Eccentricity  Difference between AA and mean wall thickness | |
Under 0.047 to 2.000 | Plus and minus 10% of mean wall thickness max ±0.060 min ±0.010 | |
2.001-4.000 | ±0.120 |
Specified wall thickness Inches | Under 5,000 | 5,000 and over | Circumscribing circle diameter Inches  Difference between1/2 (AA+BB) and specified wall thickness | ||
Alloys 5083, 5086, 5454 | Other alloys | Alloys 5083, 5086, 5454 | Other alloys | ||
Under 0.047 | 0.008 | 0.005 | 0.012 | 0.008 | |
0.047-0.061 | 0.009 | 0.006 | 0.014 | 0.009 | |
0.062-0.124 | 0.011 | 0.007 | 0.015 | 0.010 | |
0.125-0.249 | 0.012 | 0.008 | 0.023 | 0.015 | |
0.250-0.374 | 0.017 | 0.011 | 0.030 | 0.020 | |
0.375-0.499 | 0.021 | 0.014 | 0.045 | 0.030 | |
0.500-0.749 | 0.038 | 0.025 | 0.060 | 0.040 | |
0.750-0.999 | 0.053 | 0.035 | 0.075 | 0.050 | |
1.000-1.499 | 0.068 | 0.045 | 0.090 | 0.060 | |
1.500-2.000 | — | — | 0.105 | 0.070 | |
All Alloys |
Eccentricity   Difference between AA and mean wall thickness | ||
Under 0.047 | 0.005 | Plus and minus 10% of mean wall thickness max ±0.060 min ±0.010 | |
0.047-0.061 | 0.007 | ||
0.062-0.124 | 0.010 | ||
0.125-0.249 | 0.015 | ||
0.250-0.374 | 0.025 | ||
0.375-0.499 | 0.030 | ||
0.500-0.749 | 0.040 | ||
0.750-0.999 | 0.050 | ||
1.000-1.499 | 0.060 | ||
1.500-2.000 | — | ||
STANDARD TOLERANCES
EXTRUDED TUBE
Allowable deviation from specified length
Tolerance, Inches plus except as noted
Specified outside diameter or width, Inches | Specified length, Feet | |||||||
Straight | Coiled | |||||||
Up thru 12 | Over 12 thru 30 | Over 30 thru 50 | Over 50 | Up thru 100 | Over 100 thru 250 | Over 250 thru 500 | Over 500 | |
0.500-1.249 | 1/8 | 1/4 | 3/8 | 1 | +5%,–0% | ±10% | ±15% | ±20% |
1.250-2.999 | 1/8 | 1/4 | 3/8 | 1 | — | — | — | — |
3.000-7.999 | 3/16 | 5/16 | 7/16 | 1 | — | — | — | — |
8.000 and over | 1/4 | 3/8 | 1/2 | 1 | — | — | — | — |
STANDARD TOLERANCES
EXTRUDED TUBE
TWIST
Allowable deviation from straight
Temper | Specified width Inches | Specified thickness Inches |
Tolerance, Degrees  Y (max) in, Degrees | |
In total length or in any segment of one ft. or more of total length | Maximum for total length | |||
All except 0, | 0.500 thru 1.499 | All | 1 x measured length, ft | 7 |
TX 510, | 1.500-2.999 | All | 1/2 x measured length, ft | 5 |
TX511 | 3.000 and over | All | 1/4 x measured length, ft | 3 |
TX510 | 0.500 | 0.095 and over | ||
TX511 | 0.500-1.499 | 0.095 and over | 1 x measured length, ft | 7 |
1.500-2.999 | 1.500-2.999 | 0.095 and over | 1/2 x measured length, ft | 5 |
3.000 and over | 0.095 and over | 1/4 x measured length, ft | 4 | |
STANDARD TOLERANCES
EXTRUDED TUBE
STRAIGHTNESS
Allowable deviation (D) from straight
Temper | Specified outside diameter or width Inches | Tolerance, Inches |  In total length or in any segment of one ft. or more of total length |
All except 0 | 0.500-5.999 | 0.019 x measured length, ft. | |
TX510 | 6.000 and over | 0.020 x measured length, ft. | |
TX510 | 0.500 and over | Tolerances for T3510, T4510, T6510, T73510, T76510 and T8510 tempers shall be as agreed upon between purchaser and vendor at the time the contract or order is entered. |
FLATNESS
Minimum thickness of metal forming the surface Inches | Tolerance, Inches |  Maximum allowable deviation Y | |
Widths up thru 1 in. or any 1 in. increment of wider surfaces | Widths over 1 in. thru 5.999 in. | ||
Up thru 0.187 | 0.006 | 0.006 x W Inches | |
0.188 and over | 0.004 | 0.004 x W Inches | |