Best Metal Tubing For Carports: Compare 10 Options

#1 · Best Overall

1. Online Metals A500/A513 Square Tubing

• Dimensions: 72"L x 1.5"W
• Dimensions L x W: 72"L x 1.5"W
• Material: Steel

Best for: Heavy-wall square steel builders.

Why it ranks #1: Hot-rolled A36 carbon steel square tubing has a listed 1.5-inch height, 0.12-inch wall, and 72-inch length, making its structural dimensions comparatively clear.

A 72-inch A36 carbon-steel square tube with a 0.12-inch wall offers a defined, heavier-wall section for fabrication. Its hot-rolled construction and ASTM A36 specification suit buyers who want structural-grade square stock for a shorter frame member or custom build.

The 1.5-inch height and 0.12-inch wall give the tube a specified square-section dimension for layout and joining. Online Metals describes it as hot rolled A36 carbon steel meeting ASTM A36, a structural steel grade with better formability than 1018 carbon steel. That context can help a fabricator choose material for shaping and construction work. At 72 inches long, it supplies a six-foot section, so longer uninterrupted members need different stock or planned joints.

Skip it if you need uninterrupted runs longer than six feet; this A36 square tube measures 72 inches long.

A candidate for builders seeking a six-foot square steel section with a 0.12-inch wall and stated ASTM A36 material. Confirm the 1.5-inch profile suits the frame, and plan joints or other stock for longer runs.

Listed on Amazon as: A500/A513 Carbon Steel Square Tubing, Hot Rolled, ASTM A-36, 1.5" Height, 0.12" Wall, 72" Length, OnlineMetals

#2 · Longest Structural Section

2. JWM Rectangle Steel Tubing

• Dimensions: 96"L x 12"W
• Dimensions L x W: 96"L x 12"W
• Material: Steel

Best for: Long rectangular frame fabricators.

Why it ranks #2: This 96-inch rectangular steel section has a 14-gauge, 0.083-inch wall and A500 or A513 material standard, useful for longer frame runs.

A 96-inch rectangle of 3/4-by-1-1/2-inch steel gives carport fabricators a long, low-profile section from one piece. Its 14-gauge, 0.083-inch wall and A500 or A513 material standards provide specified structural-fabrication details for planning a welded frame.

The eight-foot length can cover a longer section than short stock, reducing the need to piece together that particular run. Its 3/4-by-1-1/2-inch rectangular profile and 14-gauge wall provide defined dimensions for layout and connection planning. JWM lists A500 or A513 standards and describes the tubing for structural and fabrication applications. The raw mill finish accepts welding, painting, and protective coatings, so buyers can weld first and choose a finish for the intended exposure afterward.

Skip it if you need a full frame in one purchase; this listing supplies one 96-inch tube, not a multi-piece kit.

A good candidate for a fabricator planning long rectangular members and applying a project-specific coating after welding. Check that its 3/4-by-1-1/2-inch shape suits the carport layout, and account for one tube per listing.

Listed on Amazon as: JWM Metal Supply Rectangle Steel Tubing, 3/4" x 1-1/2", 14 Gauge, Raw Mill Finish, A500/A513, Made in USA (96.0, Inches)

#3 · Long Square Section

3. Allstar Square Mild Steel Tubing

• Dimensions: 90"L x 1.5"W
• Dimensions L x W: 90"L x 1.5"W
• Material: Steel

Best for: Square steel section fabricators.

Why it ranks #3: Its 1.5-inch square mild-steel section is 7.5 feet long, offering a longer frame-member candidate than the six-foot square steel pack.

A 7.5-foot length of 1.5-inch square mild-steel tubing gives builders a substantial square section for fabrication. Its 0.083-inch wall is specified in the title, making this a straightforward option for buyers who need a single long piece rather than a short bundle.

The 90-inch length can supply one longer section in a frame or fabrication project, with the square profile suited to layouts that use square tubing. Allstar identifies the material as mild steel and specifies a 1.5-inch size with a 0.083-inch wall. These details help establish the shape and wall dimension before cutting and joining. The listing provides one length, so a multi-member carport frame requires additional material beyond this piece.

Skip it if you need several frame members from one listing; this product is a single 90-inch length.

A sensible option for a buyer who wants one long square mild-steel section for a carport fabrication. Match the 1.5-inch profile and 0.083-inch wall to the plan, and arrange additional lengths for the rest of the frame.

Listed on Amazon as: Allstar Square Mild Steel Tubing 1-1/2in x .083in x 7.5ft

#4 · Multi-Piece Pack

4. Generic Mild Steel Square Tubing

• Dimensions: 1"L x 1"W
• Dimensions L x W: 1"L x 1"W
• Material: Steel

Best for: Welded frame repair builders.

Why it ranks #4: Four six-foot, 1-inch square A36 mild-steel tubes provide 24 linear feet total, though the 0.063-inch wall is thinner than leading options.

Four six-foot lengths of 1-inch-square A36 mild steel provide 24 linear feet of raw tubing for fabrication. The 16-gauge, 0.063-inch walls suit buyers assembling brackets, frames, or repairs who want multiple matching pieces ready for cutting and welding.

Each tube measures 72 inches, and the four-piece quantity supplies a combined 24 linear feet, giving a small build or repair several lengths to allocate across its frame. A36 mild steel and the raw, unfinished surface make this a workable starting point for welding and fabrication; the product also lists brackets and repairs as intended uses. The stated ±1/8-inch length tolerance is useful when planning cuts, but should be allowed for in dimension-sensitive layouts.

Skip it if you need corrosion-resistant tubing or a finished surface; the listed raw A36 steel is unfinished.

A practical match for a carport-frame fabricator who wants four six-foot square-steel lengths for welding and repairs. Account for the raw finish and stated ±1/8-inch length tolerance when planning exposed or tightly dimensioned work.

Listed on Amazon as: (4 PACK)- 1" x 1" MILD STEEL SQUARE TUBING – 72 Inch Length (6ft) – 0.063" Thick Wall (16 Gauge)- A36 Raw Unprimed Steel Tube. Perfect for Construction, Repairs, Welding. (Total of 24 Linear Feet)

#5

5. Evecad Aluminum Square Tube

• Dimensions: 48"L x 1.5"W
• Dimensions L x W: 48"L x 1.5"W

Best for: Corrosion-conscious square-frame DIY.

Why it ranks #5: The 1.5-inch square aluminum tube has a 1/8-inch wall and 48-inch length, but it is a single shorter section rather than steel.

A 48-inch length of 1.5-inch-square 6063-T6 aluminum with a 1/8-inch wall gives small fabrication projects a corrosion-resistant square profile. Its natural mill finish and clean square cuts support straightforward handling for home-improvement work where aluminum suits the planned structure.

The 1.5-inch square dimensions and 1/8-inch wall provide a defined profile for layout, while the 48-inch length suits a short component or a piece to cut for a smaller assembly. Evecad identifies 6063-T6 aluminum as having strength and corrosion resistance, which can be useful where steel rust resistance matters. The natural mill finish and clean square cuts are described as convenient to handle; this is one tube, not a multi-length supply.

Skip it if you need long continuous carport rails; the 48-inch tube is a short component, not a long frame member.

Consider this for a small square-frame component where aluminum’s stated corrosion resistance and clean cuts suit the job. Its single 48-inch length is the key boundary; plan connections or separate longer stock for full carport spans.

Listed on Amazon as: 1.5" x 1.5"x 48" Long Structural Square Aluminum Tube, 1/8" Wall Thickness, Seamless Square Tubing DIY Metal Profile for Industrial or Home Improvement Projects, 1Pack

#6

6. Allstar Round DOM Steel Tubing

• Dimensions: 90"L x 1.75"W
• Dimensions L x W: 90"L x 1.75"W
• Material: Alloy Steel

Best for: Long round DOM tubing users.

Why it ranks #6: This alloy-steel round tube is 1-3/4 inches in diameter, has a 0.120-inch wall, and measures 7.5 feet, but is not a square frame section.

A 7.5-foot length of 1-3/4-inch round DOM alloy-steel tubing offers one continuous piece for buyers whose fabrication calls for this specific round profile. Its 0.120-inch wall is stated in the title, making the dimensions clear for layout and component planning.

The 90-inch length gives a fabricator more uninterrupted material than short tubing sections, useful when the planned component calls for a long round piece. Allstar identifies the product as DOM steel tubing and lists a 1-3/4-inch diameter with a 0.120-inch wall. The alloy-steel material specification helps distinguish it from mild-steel square options. Its round form is suited to layouts calling for round tubing, not direct substitution into square-profile frame joints.

Skip it if you need square-section carport rails; this is 1-3/4-inch round DOM tubing, not square stock.

Consider it when a carport-adjacent fabrication or custom component specifically calls for long round DOM alloy steel. Its 90-inch length and round shape set the fit boundary; plan around those dimensions rather than square frame connections.

Listed on Amazon as: Allstar Round DOM Steel Tubing 1-3/4in x .120in x 7.5ft

#7 · Corrosion-Resistant Material

7. Top Hardware 316 Stainless Tubing 1.5-Inch

• Dimensions: 2"L x 1.5"W
• Dimensions L x W: 2"L x 1.5"W
• Material: Stainless Steel

Best for: Corrosion-resistant round details.

Why it ranks #7: The 316 stainless round tube is listed as 16 gauge and offers corrosion resistance, but its round form and custom-cut listing provide less frame sizing detail.

316 stainless steel in a 1.5-inch outside-diameter round tube brings stated rust and corrosion resistance to custom fabrication. Its 16-gauge wall and brushed finish suit buyers prioritizing a durable-looking exposed rail or detail, rather than a conventional square carport-frame member.

The 316-grade stainless material is described as resistant to rust and corrosion, a relevant quality for outdoor or demanding environments. A 1.5-inch outside diameter and 16-gauge wall give fabricators a specified round-tube format for custom work; the listing names handrails, railing, and exhaust among its applications. The brushed satin finish offers an architectural appearance without tedious polishing, according to the listing. It is round tubing, so buyers planning square-frame joints should account for that profile.

Skip it if you are assembling a square-tube carport frame; this 1.5-inch round profile is specified for round-tube applications.

A fit for buyers using corrosion-resistant round tubing as an exposed rail or custom architectural detail around a carport. The round profile and custom-cut-length listing require planning around the project’s connection geometry and required finished length.

Listed on Amazon as: Premium 316 Stainless Steel Tubing, 1-1/2" Outer Diameter, Heavy Duty 16 Gauge Round Metal Pipe, Straight Railing Tube for Custom Fabrication, Exhaust, Handrails – Custom Cut Length, Brushed Finish

#8

8. Top Hardware 316 Stainless Tubing 1-Inch

• Dimensions: 2"L x 3"W
• Dimensions L x W: 2"L x 3"W
• Material: Stainless Steel

Best for: Stainless round-tube details.

Why it ranks #8: This 1-inch-OD, 16-gauge 316 stainless round tubing offers corrosion resistance, but the listed product dimensions do not clearly specify a usable length.

316 stainless steel and a 1-inch outside diameter define this round tube for buyers prioritizing corrosion resistance in custom fabrication. The 16-gauge, 0.065-inch wall and brushed finish suit exposed railing or architectural details, though the round profile differs from typical square frame stock.

Top Hardware describes 316 stainless as resistant to rust and corrosion, a useful material property for demanding indoor or outdoor applications. The 1-inch outside diameter and 0.065-inch wall give fabricators dimensions to work from, while the brushed satin finish supplies an architectural surface without tedious polishing, according to the listing. Handrails and custom fabrication are named uses. For carport framing, its round profile needs connections suited to round tube rather than square-section joints.

Skip it if you need square tubing for frame connections; this Top Hardware tube has a 1-inch round profile.

Best suited to a buyer adding a corrosion-resistant round detail or rail to a carport-related project. The 1-inch outside diameter, 0.065-inch wall, and brushed finish are specific fit considerations; it is not square frame stock.

Listed on Amazon as: Premium 316 Stainless Steel Tubing, 1" Outer Diameter, Heavy Duty 16 Gauge Round Metal Pipe, Straight Railing Tube for Custom Fabrication, Exhaust, Handrails – Custom Cut Length, Brushed Finish

#9

9. Eorbow Cold Rolled Steel Tubes

• Dimensions: 12"L x 0.75"W
• Dimensions L x W: 12"L x 0.75"W
• Material: Cold Rolled Steel

Best for: Small round-tube repair batches.

Why it ranks #9: The six-pack supplies 3/4-inch-OD round steel tubes with a 0.12-inch wall, but each is only 12 inches long and better suited to small fabrication.

Six 12-inch cold-rolled steel tubes provide a batch of short round pieces with a substantial 0.12-inch wall. Their 3/4-inch outside diameter suits small automotive or DIY fabrication tasks where repeated components matter more than long, uninterrupted carport-frame members.

The six-piece quantity gives a fabricator multiple matching short sections for a DIY project, while the 12-inch length keeps each piece suited to compact work. Eorbow specifies a 3/4-inch outside diameter, 0.51-inch inside diameter, and 0.12-inch wall, which helps buyers plan around the tube’s dimensions. The listing describes cold-rolled steel as strong and flexible and names automotive applications. These dimensions and lengths make it a component supply, not stock for spanning a carport bay.

Skip it if you need long carport rails; these six tubes are each only 12 inches, not continuous span stock.

Useful for a buyer fabricating repeated short round components or automotive DIY pieces from steel. For a carport, treat the 12-inch sections as small parts and plan a different supply for long, continuous frame members.

Listed on Amazon as: 6 Pack Cool Rolled Steel Tube, 3/4" OD Industrial Metal Tubing, 0.51" LD Seamless Round Steel Pipe, 0.12'' Wall Weldable Tubing for Automotive Applications, 12 Inch Length

#10

10. Etauwe 304 Stainless Steel Pipe

• Dimensions: 12"L x 1"W
• Dimensions L x W: 12"L x 1"W
• Material: Stainless Steel

Best for: Short stainless fabrication pieces.

Why it ranks #10: Its 304 stainless tube is only 12 inches long with a 1.5-millimeter wall, making it poorly suited to full-length carport framing.

A 12-inch piece of 304 stainless round tube offers a compact, weldable component for small fabrication jobs. Its 1-inch outside diameter and 1.5-millimeter wall give buyers defined dimensions for a connector, detail, or test cut, rather than a long carport-frame run.

The 304 stainless construction is described as high strength and weldable, supporting buyers who need a short piece for professional-equipment processing, cutting, or welding. At 12 inches long, it can serve a compact fabrication task, while the 1-inch outside diameter and 1.5-millimeter wall specify the material to lay out. The polished surface is listed as suitable for long-term use. Its short length makes it unsuitable as supplied for uninterrupted full-size carport rails.

Skip it if you need uninterrupted carport rails; this piece is only 12 inches long, while a long tube is required.

Choose this for a short stainless detail or a small weldable fabrication component, not as a complete structural span. The 12-inch length and round 1-inch profile should match the intended joint and layout before work begins.

Listed on Amazon as: 1 Inch (25mm) OD Round Metal Pipe, 304 Stainless Steel Tubing, 12" Length Weldable Industrial Straight Tube, 1 PCS