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Product Overview
ASTM A554 Stainless Steel Square Tubes
ASTM A554 and JIS G3446 welded stainless steel square tubes, grades 304/304L, 316/316L, 201/202, for mechanical and structural applications.
Product Introduction
A stainless steel square tube to ASTM A554 and JIS G3446, grades 304/304L, 316/316L, 201/202, for mechanical and structural applications.
STAINLESS STEEL SQUARE TUBES
Standard: ASTM A554 / JIS G3446
Material: 304/304L, 316/316L, 201, 202, 430, 409/409L
1. General Scope
| Item | Specification |
|---|---|
| Outside Square Dimension | 12.7 mm ~ 203.2 mm (1/2" ~ 8") |
| Wall Thickness | Min. 0.51 mm (0.020 inch); common: 0.6-6.0 mm |
| Standard Length | 6000 mm fixed length; random length 4000-7000 mm; cut-to-length available |
| Tube End | Deburred plain end |
| Surface Finish | Mill finish, Bright Annealed (BA), No.4 Hairline (180#/240#/320#/400#), Mirror polish |
2. Dimensional Tolerances for Square Tube (per ASTM A554)
| Largest outside dimension across flats (mm) | Tolerance across flats (±mm) |
|---|---|
| ≤31.8 | ±0.38 |
| 31.8 ~ 63.5 | ±0.51 |
| 63.5 ~ 139.7 | ±0.76 |
| 139.7 ~ 203.2 | ±1.52 |
3. Popular Commercial Size Table (ASTM A554 Square Tube, TP304 theoretical weight)
| Square Size (mm×mm) | Nominal Inch Size | Common Wall Thickness (mm) | Theoretical Weight TP304 (kg/m) |
|---|---|---|---|
| 12.7 × 12.7 | 1/2" × 1/2" | 0.8 / 1.0 / 1.2 | 0.29 / 0.35 / 0.41 |
| 19.05 × 19.05 | 3/4" × 3/4" | 1.0 / 1.2 / 1.5 | 0.54 / 0.64 / 0.78 |
| 25.4 × 25.4 | 1" × 1" | 1.0 / 1.2 / 1.5 / 2.0 | 0.73 / 0.87 / 1.07 / 1.38 |
| 31.75 × 31.75 | 1-1/4" × 1-1/4" | 1.2 / 1.5 / 2.0 / 2.5 | 1.11 / 1.36 / 1.77 / 2.16 |
| 38.1 × 38.1 | 1-1/2" × 1-1/2" | 1.5 / 2.0 / 2.5 / 3.0 | 1.65 / 2.16 / 2.65 / 3.12 |
| 40 × 40 | — | 1.5 / 2.0 / 2.5 / 3.0 | 1.74 / 2.28 / 2.80 / 3.31 |
| 50.8 × 50.8 | 2" × 2" | 1.5 / 2.0 / 2.5 / 3.0 / 4.0 | 2.25 / 2.96 / 3.65 / 4.32 / 5.59 |
| 63.5 × 63.5 | 2-1/2" × 2-1/2" | 2.0 / 2.5 / 3.0 / 4.0 | 3.74 / 4.62 / 5.47 / 7.11 |
| 76.2 × 76.2 | 3" × 3" | 2.5 / 3.0 / 4.0 / 5.0 | 5.58 / 6.62 / 8.63 / 10.54 |
| 80 × 80 | — | 2.5 / 3.0 / 4.0 / 5.0 | 5.87 / 6.97 / 9.08 / 11.10 |
| 88.9 × 88.9 | 3-1/2" × 3-1/2" | 3.0 / 4.0 / 5.0 | 7.81 / 10.19 / 12.47 |
| 101.6 × 101.6 | 4" × 4" | 3.0 / 4.0 / 5.0 / 6.0 | 8.93 / 11.68 / 14.33 / 16.87 |
| 127 × 127 | 5" × 5" | 4.0 / 5.0 / 6.0 | 14.70 / 18.07 / 21.33 |
| 152.4 × 152.4 | 6" × 6" | 4.0 / 5.0 / 6.0 | 17.71 / 21.78 / 25.74 |