SS400 square tubing is a square or rectangular section tube made from SS400 steel, as specified in the Japanese JIS G 3101 standard. SS400 is a common structural rolled steel; "SS" in its name stands for "Steel Structure," and "400" indicates a minimum tensile strength of 400 MPa. This steel's chemical composition is predominantly low in carbon (carbon content ≤0.29%), containing small amounts of manganese, phosphorus, sulfur, etc., and possesses the following characteristics:
1. Medium strength: Tensile strength 400-510 MPa, yield strength ≥245 MPa (data source: JIS G 3101-2015), suitable for bearing medium loads.
2. Good weldability: Low carbon content reduces the risk of welding cracks; welding can be performed without preheating.
3. Easy processing: Can be formed through cutting, bending, stamping, and other processes, suitable for diverse needs.
Common Specifications and Applications of SS400 Square Tubes
SS400 square tube specifications are typically expressed in terms of cross-sectional dimensions (side length × side length) and wall thickness. Common dimensions are as follows (unit: mm):
- Small square tubes: 20×20×1.5, 30×30×2.0, used for furniture and decorative frames.
- Medium square tubes: 50×50×3.0, 80×80×4.0, used for building steel structures and machinery supports.
- Large square tubes: 100×100×5.0, 150×150×6.0, suitable for bridges and heavy equipment bases.
Main Application Areas:
1. Building Structures: Such as factory trusses and stair railings, due to their low cost and ease of installation.
2. Machinery Manufacturing: As equipment frames or conveyor tracks, balancing strength and weight.
3. Temporary Facilities: Scaffolding and exhibition booth construction, relying on their reusable nature.
SS400 Square Tubes factory
