40x40x1.3mm Steel Square Tube for Industrial

40mm x 40mm x 1.3mm hot-dip galvanized square tube engineered for superior structural performance. Featuring optimized 1.3mm wall thickness, this square hollow section delivers exceptional strength-to-weight ratio while maintaining excellent fabrication characteristics. The heavy-duty zinc coating provides maximum corrosion protection for demanding industrial and construction applications.

Material Standard: GB/T 6728-2017, ASTM A500 Grade B

Steel Grade: Q235B/S235JR (250 MPa yield strength)

Section Profile: Square Hollow Section (SHS)

Nominal Size: 40mm x 40mm (±0.6mm tolerance)

Wall Thickness: 1.3mm (±0.12mm tolerance)

Standard Length: 6 meters (custom lengths 3-12 meters available)

25% Higher Stiffness compared to 1.2mm wall thickness
✓ Salt Spray Resistance: 600+ hours without red rust
✓ Enhanced Load Capacity: Suitable for structural applications
✓ Excellent Weldability: MIG/TIG/ARC welding compatible
✓ Superior Flatness: Cold-formed precision engineering
✓ Consistent Coating: Minimum 70μm zinc protection

Factory-Direct Pricing: No middlemen, competitive rates for bulk orders.

Customization: Free cutting, drilling, and branded packaging options.

Technical Support: CAD drawings, load calculations, and fabrication guidance.

Global Logistics: Experienced in exporting to EU, NA, and ASEAN markets.

Q1: What is the price per meter?
A: The price is calculated based on the weight per meter and the current rate per ton of steel. The theoretical weight of this 40x40x1.3mm tube is approximately 1.57 kg/m. Please [Contact Us](link to inquiry page) with your required quantity and destination port for a precise, real-time quotation. We offer competitive factory-direct pricing and discounts for large-volume orders.

Q2: What is your Minimum Order Quantity (MOQ)?
A: Our standard MOQ is 1 x 20ft container (approx. 20-25 tons). However, we can accept smaller sample orders starting from 2 tons to help you evaluate our product quality. Mixed container loads (with other sizes) are also possible.

Q3: What are the available lengths?
A: Our standard length is 6 meters. We provide a free cutting service and can supply custom lengths from 3 meters to 12 meters to minimize your waste and reduce your fabrication costs. Please specify your required lengths in your inquiry.

Q4: What is the galvanization process? What standards does it meet?
A: We use the Hot-Dip Galvanizing (HDG) process, where the steel tubes are immersed in a bath of molten zinc. This creates a metallurgical bond and a robust, durable coating. Our process complies with international standards including ASTM A123 and ISO 1461, ensuring a coating thickness of 70-90μm for superior corrosion resistance.

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