304 316 Stainless Steel Square Tube ASTM A554 Square Hollow Section Stainless Steel
ASTM A554 stainless steel square tube is a hollow structural section with four equal sides, manufactured in accordance with the American standard for welded stainless steel mechanical tubing.
This standard covers welded tubes made from stainless steel grades specifically designed for structural and mechanical applications. Our ASTM A554 square tubes offer high strength, excellent corrosion resistance, and consistent dimensional accuracy.
| Parameter | Details |
|---|---|
| Standard | ASTM A554 |
| Grades | 201, 304, 304L, 316, 316L |
| Size (Width x Width) | 10 mm x 10 mm – 200 mm x 200 mm |
| Wall Thickness | 0.8 mm – 6.0 mm |
| Length | 3000 mm, 4000 mm, 6000 mm (custom cut available) |
| Process | Welded (ERW) |
| Surface Finish | Mill finish, Pickled, Polished (No.4, BA, Mirror), Brushed |
| Element | Grade 304 | Grade 316 | Grade 201 |
|---|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.08 | ≤ 0.15 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | 5.5 – 7.5 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.050 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 10.0 – 14.0 | 3.5 – 5.5 |
| Molybdenum (Mo) | — | 2.0 – 3.0 | — |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 304 | ≥ 515 | ≥ 205 | ≥ 35 |
| 316 | ≥ 515 | ≥ 205 | ≥ 35 |
| 201 | ≥ 620 | ≥ 310 | ≥ 30 |
Note: The values above are for reference only. Please refer to the mill test certificate for actual data.
- Manufactured to ASTM A554 standard for welded mechanical tubing
- Consistent dimensional tolerances
- Smooth internal and external surface finish
- Excellent corrosion resistance
- Good formability and weldability
- Cost effective alternative to seamless tubing for many applications
| Type | Description | Typical Application |
|---|---|---|
| Mechanical Tubing (MT) | General purpose welded tube | Frames, racks, supports |
| Structural Tubing (ST) | Heavy duty welded tube | Load bearing structures, railings |
ASTM A554 stainless steel square tube is widely used across many industries:
- Handrails and guardrails
- Building frames and canopies
- Support columns
- Staircase railings
- Window and door frames
- Conveyor system frames
- Machine guards and enclosures
- Equipment supports
- Workbenches and shelving
- Material handling equipment
- Furniture frames (tables, chairs, shelving)
- Display racks and stands
- Store fixtures
- Signage frames
- Retail displays
- Truck and trailer frames
- Bus handrails
- RV and camper structures
- Luggage racks
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