Lock Joint Tube

Lock Joint Tube manufactures mechanical and structural grade steel tubing in five plants located in Indiana, Ohio, Texas, and Tennessee. Selecting hot rolled, cold rolled, aluminized, and galvanized steel, Lock Joint Tube services fabricators and distributors, as well as original equipment manufacturers with different sized and shaped steel tubing used in such diverse industries as solar, automotive, office furniture, health care, exercise, and display fixtures to name a few.

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Mechanical and structural grade steel tubing, saw and  laser-cutting, custom tubing sizes including:

• Round
• Square
• Rectangle
• Oval
• Octagon
• And other various special shapes

We excel in special-shaped tubing to help differentiate our customers in their particular marketplaces. Our In-house metallurgical lab hosts 2 degreed metallurgists and 60 years of expertise in product and process metallurgy.

Understand the importance of the raw material (steel coil) and how it responds to LJT processing into tubing. Design and engineering begins with technical interaction with the steel mills and optimizing chemistry, Hot Strip mill rolling practices, etc

Strive to reduce variability in our products so customer fabrications are predictable and controllable. This begins with consistency in raw materials, defining internal specifications often times more restrictive than industry or customer standards.

Apply best practice and Continuous Improvement methodologies to gain competitive advantages

Provide customers opportunities for cost reduction or light-weighting by introducing new shape profiles or stronger materials to reduce wall thickness or reduce tubing perimeter. LJT Technical Services offer customer Failure Analyses and Value Add Value Engineering support.

Automotive, heavy-duty truck, solar, recreational vehicles, furniture (office, hospital, music, standing desks), exercise equipment, and trailer.