Searching for large diameter aluminum pipes? This guide highlights five strong, corrosion-resistant tubes that suit structural fabrication, automotive, marine, and fabrication projects. Each product blends durability with workable dimensions, enabling easier cutting, welding, and assembly. The selections span popular alloys like 6061 and 6063, along with clear anodized finishes for added protection. Use this overview to compare sizes, wall thickness, and overall suitability for your next build. All items are readily sourced from trusted sellers and shipped in standard lengths.
| Product | Brand | Diameter / Wall | Length | Alloy / Finish |
|---|---|---|---|---|
| 4 FT – 1″ Diameter x .050″ Wall Aluminum Tubing | Randall Manufacturing Co., Inc | 1.00″ OD • .050″ wall | 4 ft | 6063 Alloy, T-6 Temper, Clear Anodized |
| 4 FT Aluminum Tubing – 1-1/4″ Diameter x .050″ Wall | Randall Manufacturing Co., Inc | 1.25″ OD • .050″ wall | 4 ft | 6063 Alloy, T6 Temper, Smooth Finish |
| 92″ Long – 1.25″ OD Round Aluminum Tubing | Randall Manufacturing Co., Inc | 1.25″ OD • .050″ wall | 92 in | 6063 Alloy, Clear Anodized |
| 6061 Aluminum Pipe, Schedule 40, 2″ Nominal | Online Metals | 2.00″ OD • 0.15″ wall | 36 in | 6061 Alloy, T6 Extruded |
| ETL INDUSTRIES Straight Aluminum Pipe, OD 1.5″ | ETL INDUSTRIES | 1.50″ OD | 18 in | T6061 Aluminum, Polished |
4 Ft – 1″ Diameter Aluminum Tubing
Randall Manufacturing Co., Inc offers a 4-foot length of 1″ diameter stainless-like aluminum tubing with a .050″ wall. Made from 6063-T6 aluminum, it features a clear anodized finish that enhances corrosion resistance and provides a clean, premium appearance. This tube is well-suited for lightweight frames, supports, and DIY assemblies where consistent wall thickness matters. The 1″ OD size supports a balance between strength and portability, and the T6 temper ensures good machinability and weldability for hobbyists and professionals alike.
Key points
- 6063-T6 alloy; lightweight yet strong
- Clear anodized for corrosion resistance
- Precise 1″ outer diameter, .050″ wall
4 Ft Aluminum Tubing – 1-1/4″ Diameter x .050″ Wall
This 4-foot aluminum tube from Randall Manufacturing features a 1-1/4″ outside diameter and a .050″ wall, built from 6063-T6 alloy. The tube is designed for durability in structural frames, marine components, and automotive fabrication. Its smooth interior and exterior surfaces facilitate welding, drilling, and finishing work. The combination of moderate diameter and robust wall thickness offers a practical option for projects requiring higher load-bearing capacity without excessive weight.
Key points
- 6063-T6 alloy; good strength and weldability
- 1-1/4″ OD, .050″ wall; 4 ft length
- Smooth interior for fabrication tasks
92-Inch Long – 1.25″ OD Aluminum Tubing
This long, 92-inch Randall tube provides a 1.25″ outer diameter with a .050″ wall, maintaining a strong strength-to-weight ratio for structural or decorative applications. The 6063 alloy with a clear anodized finish offers corrosion resistance suitable for indoor and outdoor environments. Its length makes it ideal for DIY projects requiring extended spans or custom fabrication without frequent joints.
Key points
- 1.25″ OD, .050″ wall; long-length option
- 6063 alloy; clear anodized for protection
- Uniform inner diameter supports precise fittings
6061 Aluminum Pipe, Schedule 40, 2″ Nominal
Online Metals offers a 2″ nominal aluminum pipe with a 2.067″ inside diameter and 2.38″ outside diameter, striping a 0.15″ wall. This 6061-T6 extruded pipe provides good strength-to-weight, above-average corrosion resistance, and strong weldability—well-suited for welded frames, machinery components, and heavy-duty DIY builds that demand reliable performance. While larger in diameter, it remains relatively lightweight compared to steel, enabling versatile fabrication options.
Key points
- 6061 alloy; strong, good corrosion resistance
- 2″ nominal diameter; 0.15″ wall
- Suitable for welding and structural applications
ETL INDUSTRIES Polished 1.5″ Aluminum Pipe, 18″ Length
ETL Industries presents a polished 1.5″ aluminum pipe, 18 inches long, crafted from T6061 aluminum. The smooth, burr-free finish supports easy cutting, drilling, and welding, while the polished surface aids in heat dissipation and aesthetics. This pipe is a practical option for custom intercooler piping, decorative frames, and lightweight structural parts where a larger diameter is beneficial but weight remains a consideration.
Key points
- 1.5″ OD; 18″ length
- T6061 alloy; polished finish
- Easy to machine and weld with a clean look
Buying Guide: Large Diameter Aluminum Pipe
When selecting large diameter aluminum pipe, consider diameter, wall thickness, alloy, temper, and finish. 6063-T6 tubes tend to offer smoother finishes and easier fabrication for frames and supports, while 6061-T6 provides higher strength for load-bearing structures. Wall thickness impacts stiffness and weight; thicker walls offer more rigidity but increase weight. Finishes like clear anodizing protect against corrosion and wear, especially for outdoor or marine use. Length and availability in standard stock or needed custom cuts influence cost and project flow. Welding, drilling, and bending capabilities depend on alloy and temper. Match diameter to fittings and load requirements for optimal performance.
Additional Considerations
- Corrosion resistance: anodized finishes or high-grade alloys for outdoor projects
- Weldability: 6061 and 6063 alloys weld well with common methods
- Machinability: smooth interiors reduce friction in moving assemblies
- Industry standards: check for tolerance specs and compatibility with connectors
- Source reliability: choose reputable suppliers with consistent casing and length options