Seamless Cold Worked Tubing

The seamless cold worked tubing available at Salem Steel NA, LLC is custom manufactured, created from raw form solid bar and pierced to convert to mother hollow. Our onsite normalizing process produces suitable tubing for cold working, and after a sulfuric acid cleaning, cold rinsing, and lubrication bath, the specified materials are drawn utilizing a mandrel draw bench with carbide die. The outside diameter, inside diameter, and wall thicknesses are reduced to the required dimensions with resulting high tensile properties, dimensional accuracy, micro structure uniformity and excellent surface quality. Tubing is available in a range of carbon and alloy grades including 1020, 1026, 1030, 4130, and 4140 among others.

Our experienced tube making process is adapted and modified to produce customer specified components for critical applications. Parts are stress relieved others are quench & tempered followed by rotary straightened for extremely straight tubes and tube ends are then cut to an exact 90° square. Parts are deburred and coated with a rust preventative treatment. Thorough testing methods are employed in process and post production to ensure the highest quality and accuracy levels, including eddy current testing, 100% dimensional tests, straightness, and cosmetic evaluations. For more details about our custom seamless cold worked tubing, or further tubing capabilities including specialty applications and value added offerings please see the table below or contact us directly.

Seamless Cold Worked Tubing Project Highlights

Product Name: Seamless cold worked tubing

Manufacturing Processes

Raw Material Form: Solid Bar
Bar Pierced converting to Mother Hollow
Normalizing- Heat treatment

Produces suitable tubing for cold working

Acid Pickling and Lubrication

Sulfuric Acid Cleaning
Cold Rinsing
Zinc Phosphating
Lubrication Soap Bath
- Prevents Material from Scratching and Breaking During Cold Work Process

Pointing
Cold Work Drawing

Size reduction of the Outside Diameter, Inside Diameter, and Wall Thickness using a Carbide Die & Mandrel (Draw bench)

Stress Relieving- Heat treatment

Produces suitable tube for finishing operations

And mechanical properties.
Rotary Straightening- rotating rolls

Extremely Straight Tubes

Cutting to Length

Cut Approx. 1" - 2" off of Each End to a 90° Square Cut

Deburring

I.D and O.D

Eddy Current Testing
* Electronic coil machine that detects defects throughout the tube.
Stenciling
*Continuous marking on the O.D. of the tube describing producing mill, material, specification and size.
Rust Preventative Coating

Submerged into Tanks with Overhead Cranes

Wall Thickness: See cold drawn seamless table

Product Length: Up to 48'

Product Diameter: .250" through 8.500"

Material Used: 1020, 1026, 4130, 4140, and many others

Additional Facts: Final Inspection

Testing/Inspection Performed

100% Dimensional Testing

Outside & Inside Diameter Wall Thickness Straightness Cosmetics

Rust
Dirt
Grease

Industry for Use: See Cold drawn seamless table

Shapes: See cold drawn seamless table

Standards Met: See cold drawn seamless specifications/ standards