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400 Series Stainless Steel Tube


409 Stainless Steel Tube

An economical stainless steel tube option with corrosion and oxidation resistance beyond carbon steel.

409 Stainless Downpipe

Corrosion and Oxidization Resistance

To mill Type 409 Stainless Steel Tube, Phillips Tube begins with a chromium, titanium-stabilized, ferritic stainless steel. Chromium gives this steel grade its excellent corrosion resistance, making it superior to carbon steel and some coated steels.

Type 409’s corrosion and oxidation resistance extends into high air temperature environments, making it ideal for more extreme atmospheres. Good formability makes type 409 an ideal choice for hard-to-form pieces.

Thanks to the combination of elevated temperature corrosion and oxidation resistance, formability and economic cost, type 409 stainless steel tubing is a popular choice for automotive exhaust systems, including tubular manifolds; agricultural equipment such as spreaders; gas turbine exhaust silencers and heat exchangers.

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409 Stainless 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