ASTM A554/JIS G3446 Mechanical Tube
Standard: ASTM A554/JIS G3446 Mechanical Tube
Material/Steel Grade: MT304, MT304L, MT316L, MT430 Grade 201, 202 as per mill's STD SUS304
Application: Mechanical and Structural Tubes
Size: OD: 7.9~152.4mm WT: 0.5~6.5mm
Finish: Mill,220/320/400/600/800 Grit
Standard: ASTM A554 Square Tubes
Material/Steel Grade: MT304, MT304L, MT316L,MT430 Grade as per mill's STD
Application: Square Tubes
Size: OD: 12.7x12.7~150x150mm WT: 0.7~6.5mm
Finish: Mill 220/320/400/600 Grit
Standard: ASTM A554 Rectangular Tubes
Material/Steel Grade: MT304, MT304L, MT316L,MT430 Grade as per mill's STD
Application: Rectangular Tubes
Size: OD: 10x20~100x200mm WT: 0.7~6.5mm
Finish: Mill 220/320/400/600 Grit
ASTM A554/JIS G3446 Mechanical Tube Diameter, Wall,A and Ovality Toerances
NOTE 1 – Ovality is the difference between maximum and minimum outside diameters measured at any one cross section. There is no additional tolerance for ovality on tubes having a nominal wall thickness of more than 3% of the outside diameter.
NOTE 2 – For sizes up to and including 5-in. (127.0-mm) outside diameter, an ovality tolerance of twice the tabular outside diameter tolerance spread shown is applied diamter readings should fall within the outside diameter tolerances as shown in this table.
NOTE 3 – For sizes over 5-in. (127.0mm) to and including 16-in. (406.4-mm) outside diameter, when the specified wall thickness is 3% or less of the outside diameter, the ovality shall not exceed 1.5% of the specified outside diameter.
| OD Size, in.(mm) | Wall Thickness | OD, ± | ||
| in. | mm | in. | mm | |
| Under 1/2 (12.7) | 0.020 to 0.049 | 0.51 to 1.24 | 0.004 | 0.10 |
| 1/2 to 1 (12.7 to 25.4) | 0.020 to 0.065 | 0.51 to 1.65 | 0.005 | 0.13 |
| 1/2 to 1(12.7 to 25.4) | over 0.065 to 0.134 | over 1.65 to 3.40 | 0.010 | 0.25 |
| Over 1 to 1/2 (25.4 to 38.1), incl | 0.025 to 0.065 | 0.64 to 1.65 | 0.008 | 0.20 |
| Over 1 to 1/2 (25.4 to 38.1), incl | over 0.065 to 0.134 | over 1.65 to 3.40 | 0.010 | 0.25 |
| Over 1 to 2 (25.4 to 38.1), incl | 0.025 to 0.049 | 0.64 to 1.65 | 0.010 | 0.25 |
| Over 1 to 2 (25.4 to 38.1), incl | over 0.049 to 0.083 | over 1.65 to 3.40 | 0.011 | 0.28 |
| Over 1 to 2 (25.4 to 38.1), incl | over 0.083 to 0.149 | 0.64 vo 1.24 | 0.012 | 0.30 |
| Over 2 to 2 1/2 (25.4 to 38.1), incl | 0.032 to 0.065 | over 1.24 to 2.11 | 0.012 | 0.30 |
| Over 2 to 2 1/2 (25.4 to 38.1), incl | over 0.065 to 0.109 | over 2.11 to 3.78 | 0.013 | 0.33 |
| Over 2 to 2 1/2 (25.4 to 38.1), incl | over 1.109 to 0.165 | 0.81 to 1.65 | 0.014 | 0.36 |
| Over 2 to 3 1/2 (25.4 to 38.1), incl | 0.032 to 0.165 | over 1.65 to 2.77 | 0.014 | 0.36 |
| Over 2 to 3 1/2 (25.4 to 38.1), incl | over 0.165 | over 2.77 to 4.19 | 0.020 | 0.51 |
| Over 3 to 5 1/2 (25.4 to 38.1), incl | 0.035 to 0.165 | 0.81 to 4.19 | 0.020 | 0.51 |
| Over 3 to 5 1/2 (25.4 to 38.1), incl | over 0.165 | over 4.19 | 0.025 | 0.34 |
| Over 5 to 16 1/2 (25.4 to 38.1), incl | all | all | 0.00125 in./in. or mm/mm of circumference | |
