1. Material & Standards
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Material: Carbon Steel
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Grades: ASTM A500 Gr.C
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Standards: ASTM A500
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Type: Square Steel Tube (Welded or ERW)
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Coating/Finish: Black Painted, Galvanized, or Powder-Coated Optional
2. Key Specifications
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Size Range: 20x20mm to 400x400mm (Custom Sizes Available)
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Wall Thickness: 2mm to 16mm or Custom
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Length: Standard 6m / 12m, Custom Length Available
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Pressure Rating: Suitable for Structural and Industrial Applications
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Surface Protection: Black Painting, Galvanization, or Powder Coating for Durability
3. Features & Benefits
✔ High Strength & Durable – ASTM A500 Gr.C steel ensures excellent mechanical properties
✔ Versatile Use – Ideal for structural frameworks, construction, and industrial applications
✔ Corrosion Protection – Optional painting, galvanization, or powder coating extends service life
✔ Easy Fabrication – Standardized square dimensions simplify cutting, welding, and assembly
4. Applications
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Structural Steel Frames and Supports
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Industrial Machinery and Equipment
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Construction and Infrastructure Projects
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Furniture and Architectural Frameworks
5. Certifications
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Mill Test Certificate (MTC)
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ISO 9001 Certified
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Hydrostatic & Ultrasonic Tested
Frequently Asked Questions (FAQ)
1. Are you a manufacturer or trading company?
We are a manufacturer with our own factory located in Hebei, China.
2. What materials do you offer?
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Stainless Steel: 304, 304L, 316, 316L, 321, etc.
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Carbon Steel: ASTM A105, ASTM A350 LF2, Q235, Q345, etc.
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Alloy Steel: ASTM A182 F11, F22, F5, etc.
3. Which standards do your products comply with?
ASME B16.5, ANSI, ASTM, DIN, JIS, EN, GB — with third-party inspection available.
4. Do you support OEM/ODM customization?
Yes, we provide custom machining, coating, marking, and packaging based on your drawings.
5. What is your minimum order quantity (MOQ)?
MOQ is typically 1 piece for standard items; customized parts may vary.
6. Do you provide free samples?
Yes, free samples for standard sizes are available; buyers cover shipping cost.
7. What is your delivery time?
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In-stock: 3–5 working days
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Bulk/custom orders: 10–25 working days
8. How do you ensure product quality?
We perform full inspection: raw material verification, dimensional checks, pressure/leak tests, and surface finish inspection. Third-party testing is available upon request.
