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Pickled stainless steel square pipe
1. Square tubes undergo acid pickling treatment. Surfaces are clean and free of oxide layers. Suitable for spot polishing, coating applications, or direct industrial use.
2. Dimensions range from 15×15mm to 400×400mm. Wall thickness: 1.0–6.0mm. Square corners, deburred ends, plastic-sealed ends.
3. Dimension tolerances are stable. Suitable for bending, welding, and forming processes. Includes factory inspection certificates. Ready for immediate shipment.
Common Materials
| Series | Grade | Description |
|---|---|---|
| 300 Series | 304, 304L, 316, 316L | Austenitic stainless steel with excellent corrosion resistance |
| 200 Series | 201, 202 | Economical option for general industrial applications |
| Duplex Steel | 2205, 2507 | High strength, resistant to stress corrosion cracking |
Applicable Standards
| Type | Standard | Title | Application |
|---|---|---|---|
| Domestic | GB/T 12770-2025 | Welded Stainless Steel Tubes for Mechanical Structures | Square tubes for mechanical and structural applications (2025 latest edition) |
| YB/T 5363-2016 | Welded Stainless Steel Tubes for Decoration | Decorative and general structural applications | |
| JG/T 539-2017 | Stainless Steel Welded Tubes for Construction | Building structures and decorative applications | |
| International | ASTM A554 | Standard Specification for Welded Stainless Steel Mechanical Tubing | Square tubes for mechanical and structural applications |
| EN 10296-2 | Welded Steel Tubes for Mechanical and General Engineering Purposes | European standard for mechanical structural tubing | |
| JIS G3446 | Stainless Steel Tubes for Machine Structures | Japanese standard for mechanical structural applications |