Choosing the right 4 inch square metal tubing involves balancing strength, weight, and workability. This guide highlights top options across carbon steel, stainless, and aluminum to fit structural frames, automotive parts, DIY builds, and industrial projects. Each product features practical details like wall thickness and length, plus notes on fabrication. Use the buying guide to compare materials and select the best option for your project needs.
| Product | Material | Wall Thickness | Length |
|---|---|---|---|
| OnlineMetals A500/A513 Carbon Steel Square Tubing | Carbon Steel | 0.12″ | 12″ |
| A500/A513 Carbon Steel Tube-Square | Carbon Steel | 0.1875″ | 12″ |
| 1/4″ Wall Aluminum Square Tube, 6061 | 6061 Aluminum | 0.250″ | 4″ |
| 1/8″ x 4″ x 4″ Mild Steel Square Tube | Mild Steel A500/A513 | 0.125″ | 36″ |
| A36 Hot Rolled Square Tubing | Carbon Steel | 0.120″ | 48″ |
Below are five carefully chosen products that align with the 4 inch square tubing category. Each section provides a concise overview, key features, and practical considerations to help you compare materials and fabrication options for your next project.
OnlineMetals A500/A513 Carbon Steel Square Tubing
High-strength carbon steel square tubing designed for structural integrity in frameworks, machine supports, and architectural metalwork. Features a 4″ height with a 0.12″ wall and a 12″ length. Ready for modification—uncoated and suitable for welding, drilling, or cutting to fit various design needs. This makes it a top choice for both professional engineers and DIY builders seeking reliable steel for innovative applications.
A500/A513 Carbon Steel Tube-Square
This 4″ square tube uses A500/A513 grade carbon steel, known for good strength, weldability, and cost efficiency. It is widely used in structural applications for bridges, buildings, automotive, and appliance industries. The 0.1875″ wall thickness adds rigidity while remaining workable for fabrication and assembly in common construction projects.
1/4″ Wall Aluminum Square Tube, 6061
6061 aluminum square tubing with a 0.250″ wall thickness and a 4″ x 4″ cross-section. Aluminum provides lighter weight, corrosion resistance, and ease of fabrication. Suitable for frames, supports, and non-welding applications where weight savings are essential. This option supports applications in robotics, display frames, and lightweight structural components.
1/8″ x 4″ x 4″ Mild Steel Square Tube
Lightweight mild steel square tubing with a 1/8″ wall and 36″ length. It supports straightforward fabrication, welding, and machining for hobbyist projects, frames, and custom hardware. A practical balance of strength, cost, and workability for many DIY and light-industrial builds.
A36 Hot Rolled Carbon Steel Square Tubing
Hot rolled A36 carbon steel square tubing with a 4″ x 4″ cross-section and a 0.120″ wall. It can be welded and is suitable for a variety of structural and fabrication projects. The hot-rolled process provides good machinability and strong transverse properties, making it a common choice for basic framing and architectural applications.
Hot Rolled Carbon Steel A513/A500 Square Tubing
Hot rolled carbon steel square tubing in the A513/A500 family with a 4″ x 4″ cross-section and a 0.25″ wall. Engineered for framing, supports, and heavy-duty structures, it offers weldability and machinability for a range of industrial and DIY projects. Precision manufacture supports consistent wall thickness and dimensional accuracy.
Buying Guide: Key Purchase Considerations And Comparisons
- Material selection: Carbon steel offers high strength and lower cost but may require protective coatings to resist corrosion. Aluminum provides lighter weight and corrosion resistance, ideal for non-load-bearing frames. Stainless steel offers corrosion resistance with higher strength, though at a higher cost.
- Wall thickness and strength: Thicker walls increase stiffness and load-bearing capacity but add weight and cost. Match wall thickness to your structural requirements and fabrication tolerances.
- Length and cutability: Longer pieces are useful for large frames and devices, but may require on-site cutting. Check availability of 12″ vs. 36″ or 48″ lengths and feasibility of on-site modifications.
- Weldability and fabrication: Some grades weld easily (e.g., A500/A513 carbon steel), while aluminum and stainless may require different welding techniques. Consider whether you need prep work like deburring or coating after cutting.
- Corrosion resistance: Aluminum and stainless steel excel in corrosion-prone environments, while bare carbon steel may need protective coatings for outdoor use.
- Cost and availability: Carbon steel typically provides cost-effective options with broad availability. Aluminum and stainless variants may have cost premiums but deliver specific performance benefits.
- Applications and compatibility: Align tubing grade with intended loads, mounting methods, and compatibility with connectors, brackets, and fasteners.
- Finish and appearance: For visible components, consider finishes (unpolished, mill finish, or coated) to meet aesthetic and surface requirements.
This selection emphasizes common cross-section and length combinations used in structural framing, machine supports, and DIY projects. Evaluate your load requirements, environment, and fabrication capabilities to choose the most suitable 4 inch square tubing.