Mechanical Steel Tubing
Mechanical Steel Tubing Supplier – Precision, Versatility & Finish Control
MB Metals offers a full line of mechanical steel tubing for applications that demand clean finishes, tight tolerances, and high machinability. We supply tubing in round, square, rectangular, and ornamental profiles, with various finishes and wall thicknesses tailored to your project specs.
Used in everything from industrial fabrication to architectural design, our mechanical tubing meets ASTM A500 and A513 specifications and is available in P&O, Cold Rolled (CR), and primer-coated finishes.
- Cut-to-length service available
- Domestic and international fulfillment
- Stocked and specialty sizes
Mechanical Tubing Types & Applications
Ornamental Mechanical Tubing
Also known as decorative tubing, ornamental mechanical tubing is used where visual appearance is important. It features clean finishes and precise sizing, making it a popular choice for:
- Boat railings and ladders
- Automotive step bars and bumpers
- Playground structures
- Architectural framing and furniture
— Available in polished, P&O, and primer-coated finishes
— Weldable and formable without compromising appearance
Round Mechanical Tubing
Round tubing is designed for general use in high-strength applications where uniformity and tight tolerance are essential. Common uses include:
- Automotive frames and suspension components
- Machinery and equipment assemblies
- Framework for trailers and utility structures
— Smooth inside and outside diameter
— Ideal for bending, drilling, and machining
Rectangular Mechanical Tubing
Rectangular tubing is engineered for space-saving structural strength in environments where low profile and flat surfaces are critical. Applications include:
- Cross bracing and framing
- Structural platforms and conveyor systems
- General construction support
- Enclosures and machine guards
— Excellent load distribution across flat sides
— Widely used in fabrication and infrastructure
Square Mechanical Tubing
Square tubing provides structural strength and geometric uniformity, making it a go-to choice for:
- Building frameworks
- Fencing (commercial and residential)
- Bracing in transport vehicles or bridges
- Industrial racking and support systems
— Custom length availability
— Consistent weld seam placement and tight tolerance
Product Specifications – Mechanical Tubing
Grades: ASTM A513 – P&O and Cold Rolled (CR)
ASTM A500 Grades A, B – Black, P&O, Cold Rolled (CR)
Square & Rectangular Tubing
- Sizes: ½″ x ½″ to 3″ x 3″
- Wall Thickness: .049″ to .120″
- Lengths: 20′, 24′, or customer-specified
ROUND TUBING
- Sizes: ½″ to 3″ diameter
- Wall Thickness: .049″ to .120″
- Lengths: 20′, 24′, or custom
PRIMER COATED TUBING
- available in red, blue, grey, or custom colors
Square & Rectangular Tubing Chart (A500 / A513)
| NPS Diameter | OD | NOMINAL WALL THICKNESS/GAUGE | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| .063″ | .065″ | .072″ | .083″ | .090″ | .095″ | .104″ | .109″ | .120″ | ||
| 1″ | 1.315″ | x | x | x | x | x | x | x | x | x |
| 1-1/4″ | 1.660″ | x | x | x | x | x | x | x | x | x |
| 1-1/2″ | 1.900″ | x | x | x | x | x | x | x | x | x |
| 2″ | 2.375″ | x | x | x | x | x | x | x | x | x |
| 2-1/2″ | 2.875″ | x | x | x | x | x | x | x | x | x |
Mechanical Tubing Gallery
Let’s Get You the Right Steel Product – Fast.
Whether you know exactly what you need or you’re comparing specs, our team is here to help. Get a fast quote, check availability, or ask a technical question — and we’ll respond promptly.