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Coated Steel Tube


Galvanized Steel Tube

A powerful alloy, zinc safeguards steel’s strength against the wear of time and elements.

Galvanized Conveyor Roller

Molten Guarded

A continuous hot-dip process plunges a Middletown Steel Tube into a molten bath of zinc. Each plunge into the 850˚F zinc adds a thin protective layer to the steel’s surface, forming a tight metallurgical bond.

As it cures exposed to the atmosphere, the pure zinc hardens into a formidable barrier against corrosion. More economical than stainless steel, conventional, hot-dip galvanized steel tube is the go-to for many automotive, appliance, HVAC and construction fabrications.

For more specialized applications, look to Phillips Tube’s Galvalume, Galvannealed or Electrogalvanized Steel Tube.

Galvalume Steel Tube

Coated with a zinc-aluminum alloy, galvalume steel tube combines the corrosion and heat resistance of aluminum with the added strength of zinc for an extra sturdy shield against the elements and temperatures. Perfect for applications demanding long-term resistance to atmospheric corrosion, such as automotive fuel and fluid systems, and automotive exteriors and off-road vehicles.

Galvannealed Steel Tube

Galvannealed steel tube receives an all over, continuous coating of zinc before undergoing additional heat. Induction heating alloys the zinc coating with the steel core to create a zinc-iron alloy. The final galvannealed steel tube adds corrosion protection and excellent paint adhesion to the muscle of steel. Common in automotive, HVAC and general manufacturing. Learn more about the industries we serve and our tubing applications.

Electrogalvanized Steel Tube

The work of an electric current, electrogalvanized steel tube receives its excellent corrosion resistance from a thinner zinc coating. Without sacrificing protection, Electrogalvanization creates a tube with superior surface quality and smoothness for paintability or powder coating. Popular for auto bodies, appliances and small parts.

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Galvanized Steel Tube Specifications and Figures

Outside diameter capabilities
.3125” (7.938mm) – 5.000” (127mm)
Gauge capabilities
.025 (.638mm) - .157 (4.0mm)
Length capabilities
1.25” – 240.00”
Shape capabilities
D-shape, Double-D, Round, Square, Rectangle, Oval and specialty shapes
End Conditions
Haven Cut, Mill Cut, Brushed, Brushed Deburred, Drop, End facing and Chamfering
Finishing
ID/OD scarfing to remove extruded weld bead
100% American Steel

It's a lot more than steel that makes a Middletown tube. It's attention to your specifics.

Lets Make a Match

Why Choose Middletown Tube?

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More Than Steel

More than steel makes a Middletown tube. Our tubes exceed ATSM and industry standards by as much as 200%. Through destructive testing, we try each tube for weaknesses and strengths. Our XIRIS post-weld inspection uses laser-camera triangulation to measure weld geometry and contour irregularities.

It’s more than steel that makes a tube less likely to fail, split or break. A tube that follows lean manufacturing techniques and reaches a level of implausible lightweighting, allowing you to save resources and create better products. People with over 20+ years of experience make a Middletown tube, keep our 27 mills running to the tune of a 4-week turnaround and on-time delivery.

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Our Steel

Not just any steel becomes a Middletown steel tube. To find the most consistent and reliable steel, we trialed steel from mills both domestic and international. Time and again, AK Steel met our exact standards. Coil to coil, AK Steel adheres to the strictest chemistry and thickness control.

It’s pure American steel, the highest-rated; which is why 85% of our steel is AK Steel. To provide you superior service, we’ve located our mill next door to AK Steel.

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Onsite Metallurgical Lab

Heat and pressure may form Middletown Tube, but it’s research and innovation that mature it. Our onsite metallurgical lab tirelessly works towards higher standards of craft and precision with special attention to your specific requirements.

Our lab also troubleshoots customer and competitor tubing. To determine failure causes, we run an array of tests: Coating, metal composition, chemistries, hardness, gauge and more. With diagnosis in hand, we then provide the right tubing solution.

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Lock Down Steel Pricing

A steel coil warehouse is a rare, money-saving asset for customers. To help insulate you from fluctuations in steel prices, Middletown Tube offers the option of price lock. A large volume purchaser, Middletown Tube fills our dedicated warehouse with coils for contract customers.

Customers may lock in their steel rate for an entire year without worry of an increase in price. Middletown Tube carries the cost and stores the steel.

No Tube Should Be One-Size-Fits-All


Whatever the specification, Middletown Tube can match your exact need.

Send us your specs