20x20x1.3mm Hot-Dipped Galvanized Square Tube

Our 20x20x1.3mm hot-dipped galvanized square tube combines compact design with robust performance. Ideal for lightweight structural and decorative uses, this square hollow section (SHS) is manufactured from high-grade mild steel (Q195/Q235) and processed through rigorous hot-dip galvanization, ensuring superior corrosion resistance and durability. With a precise 1.3mm wall thickness, it offers enhanced strength while maintaining easy workability for diverse projects.

Weight/Meter: ≈0.78 kg/m

Coating Mass: 180-220 g/m² (≥60μm avg. thickness)

Yield Strength: ≥235 MPa (Q235)

Tensile Strength: 370-500 MPa

Surface Hardness: 70-80 HRB

Packaging: Standard export bundle (2-3 tons per 20ft container) with moisture-proof wrapping.

High Precision: Laser-calibrated dimensions (20±0.3mm, thickness ±0.05mm) ensure perfect fit for assembly.

Enhanced Durability: Hot-dip galvanized coating (60-80μm) provides full protection against rust, scratches, and harsh environments.

Easy Fabrication: Can be cleanly cut, welded, drilled, or bent without cracking or deformation.

Aesthetic Finish: Uniform zinc spangle surface suitable for visible applications without additional painting.

Lightweight Strength: Weighs only ~0.78 kg/m, reducing overall structural load.

Full compliance with ASTM A500 and ISO 1461 standards.

Mill test certificates (MTC) and third-party inspection (SGS/BV) available.

100% dimensional and surface quality checks before shipment.

Furniture: Chair/table frames, shelving brackets, wardrobe structures.

Construction: Handrails, decorative trims, light partition systems.

DIY & Retail: Greenhouse frames, garden trellises, pet enclosures.

Industrial: Machinery guards, conveyor components, electrical cabinet frames.

Retail Displays: Exhibition stands, product racks, boutique fixtures.

Q1: What is the exact weight per meter of this 20x20x1.3mm tube?
A: The theoretical weight is approximately 0.78 kg per meter. This is a critical calculation for logistics and cost. We provide a detailed weight table with all bulk orders.

Q2: What is the difference between Q195 and Q235 steel material? Which one should I choose?
A: Q235 steel has a higher yield strength (≥235 MPa) compared to Q195 (≥195 MPa), making it slightly stronger. For most applications like furniture, displays, or light fencing, Q195 is sufficient and more cost-effective. For structural parts requiring more strength, we recommend Q235. We can supply both; please specify your requirement.

Q3: What is the tolerance on the dimensions and thickness?
A: We maintain strict tolerances to ensure product consistency:

Outer Size: 20mm ±0.3mm

Wall Thickness: 1.3mm ±0.07mm

Length: ±5mm for standard 6m lengths

Hot Tags: 20x20x1.3mm hot-dipped galvanized square tube, China 20x20x1.3mm hot-dipped galvanized square tube manufacturers, suppliers, factory