Welded Stainless Steel Tubing

Welded Stainless Steel Tubing

An Efficient Alternative to Seamless Tubing

Plymouth® has been a trusted stainless steel tubing manufacturer since 1924, supporting demanding applications across aerospace, nuclear power generation, chemical processing, and other specialized markets. Our welded stainless steel tubing delivers a high-value, efficient alternative to seamless options while still meeting stringent mechanical and physical properties required for long-term performance.

Our proven manufacturing processes ensure consistent material integrity, backed by responsive technical support to meet your exact specifications. From initial design to custom engineering, we provide the metallurgical expertise needed to maintain your production timelines and quality standards.

Welded Stainless Steel Tubing

An Efficient Alternative to Seamless Tubing

Plymouth® has been a trusted stainless steel tubing manufacturer since 1924, supporting demanding applications across aerospace, nuclear power generation, chemical processing, and other specialized markets. Our welded stainless steel tubing delivers a high-value, efficient alternative to seamless options while still meeting stringent mechanical and physical properties required for long-term performance.

Our proven manufacturing processes ensure consistent material integrity, backed by responsive technical support to meet your exact specifications. From initial design to custom engineering, we provide the metallurgical expertise needed to maintain your production timelines and quality standards.

Customized Welded Tubing for Proven Performance

Plymouth® welded stainless steel tubing is manufactured for high-integrity applications where corrosion resistance, repeatability, and strict specification compliance are required. We offer specialized capabilities to meet the most demanding project needs:

  • Custom-Engineered Sizing: We manufacture welded tubing to exact customer specifications and dimensional requirements for seamless integration into your assemblies.
  • Consistent Mechanical Properties: Our precision manufacturing processes ensure consistent material behavior, providing manufacturers with predictable, repeatable performance across every production run.
  • Value-Added Processing: For critical service needs, Plymouth® provides additional capabilities including enhanced non-destructive testing (NDT) and precision value-add services ‘beyond the tube.’
  • Total Solutions Partner: Our team acts as a strategic partner, assisting with material selection and application-specific engineering to ensure your design meets its performance goals.

Welded Stainless Steel Tubing Specifications

Welded Stainless Steel Pressure Tubing

ASTM A/B and ASME SA/SB SpecificationsGradesOD RangeWall RangeMaximum Length

-269 Welded Austenitic Stainless Steel General Service Tubing 

  • 304/L
  • 316/L
  • 317/L
  • 347 
  • 0.125” – 4.000”
  • 3.175mm – 101.6mm
  • 0.016” – 0.218”
  • 0.4064mm – 5.54mm
  • 48’ – 130’
  • 14.63m – 39.63m

-270 Welded Austenitic Stainless Steel Tubing

  • 304/L,
  • 316/L,
  • AL-6XN®
  • 0.500” – 4.000”
  • 3.175mm – 101.6mm
  • 0.065” – 0.131”
  • 1.651mm – 3.3274mm
  • 48’ – 130’
  • 14.63m – 39.63m

-632 Seamless Austenitic Stainless Steel Tubing for General Service

  • 304/L/N
  • 316/L/N
  • 321
  • 347
  • 0.125” – 1.500”
  • 3.175mm – 12.7mm
  • 0.016” – 0.065”
  • 0.4064mm – 1.651mm
  • 130’
  • 39.63m

-676 UNS N08367

 

  • AL-6XN®
  • 0.250” – 4.000”
  • 6.35mm – 101.6mm
  • 0.020” – 0.120”
  • 0.508mm – 3.048mm
  • 48’ – 130’
  • 14.63m – 39.63m

Welded Stainless Steel Nuclear Instrumentation Tubing

ASTM A/B and ASME SA/SB SpecificationsGradesOD RangeWall Range Maximum Length

-213 ASME Section III – Class 1, 2, & 3

  • 304/L
  • 316/L
  • 0.125” – 1.500”
  • 3.175mm – 38.1mm
  • 0.016” – 0.120”
  • 0.4064mm – 3.048mm
  • 130’
  • 42.67m

17-7PH® is a registered trademark of AK Steel. Custom 455® is a registered trademark of Carpenter Technology.

Welded & Drawn Aerospace Tubing Specifications

Aircraft SpecificationsGradesOD RangeWall Range Maximum Length

AMS 5564, AMS 5565, AMS 5566, AMS 5567, AMS 5569 

  • 304/L 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.218”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

AMS 5557, AMS 5575 

  • 321 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  •  
  • 0.016” – 0.218”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

AMS 5556, AMS 5575 

  • 347 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.218”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

AMS 5581 

  • 625
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.141”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

AMS 5580, AMS 5581 

  • 600 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.141”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

PWA 1065 

  • 718 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.136”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

TP-716 

  • 718 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.136”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

AMS 5561, BMS 7-185, HMS6-1132 

  • 21-6-9 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.110”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

AMS 5568 

  • 17-7PH® 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.136”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

AMS 5578

  • Custom 455® 
  • 0.188” – 4.000”
  • 4.78mm – 101.6mm
  • 0.016” – 0.110”
  • 0.4064mm – 5.54mm
  • 48ft – 60ft
  • 14.63m – 18.29m

17-7PH® is a registered trademark of AK Steel. Custom 455® is a registered trademark of Carpenter Technology.

Mechanical Properties

Tensile Strength

515 MPa minimum / 75,000 psi minimum

Yield Strength

205 MPa minimum / 30,000 psi minimum

Total Elongation Under Load

30.000%

Hardness

22 Maximum HRC

Alloys

  • Austenitic: 304/L/N, 316/L/N, 317/L, 321, 347
  • Ferritic/Super-Ferritic: 430, 439
  • Duplex/Lean Duplex: 2101, 2205, 2507
  • High Nickel: AL-6XN®, 600, 625, 800, 825, C-276, C-22
  • PH Grades: 17-4, 17-7
  • Specialty: E-Brite®, Nitronic 30/40, Alloy 20, Invar 36, 718, 21-6-9

Industrial Applications

Aerospace Tubing

Plymouth® is a trusted manufacturer of welded stainless tubing for the aerospace industry, serving aerospace applications that need repeatable mechanical properties, specification compliance, and tight dimensional consistency. The specifications for each grade of welded stainless steel aerospace tubing are available in our aerospace tubing sell sheet.

Space Propulsion

Leveraging a century of manufacturing excellence, Plymouth® welded stainless steel tubing is engineered to meet the rigorous performance standards required for launch systems and orbital components. Our precision-manufactured tubing provides a dependable solution for the exacting tolerances and environmental demands of space propulsion.

Markets for Welded Stainless Steel Tubing

Aerospace tubing

Aerospace

Welded stainless aerospace tubing is manufactured at our Trent Mill to meet aircraft industry specifications and fabricated for the construction of various aerospace components:

  • Wing mounts
  • Vertical stabilizer spars
  • Engine pylons
  • Floor beams
  • Airframe and structural components
Defense

Defense

Plymouth® welded stainless steel tubing provides a versatile, high-integrity solution for military infrastructure requiring a balance of structural durability and field-proven reliability. Our ITAR-compliant manufacturing ensures the scalable production and material traceability necessary for mission-critical applications, including:

  • Hydraulic and fluid actuation lines
  • Vehicle structural frameworks
  • Naval support systems
  • Tactical equipment housing
Firearms

Firearms

Plymouth®’s welded stainless steel tubing helps eliminate unnecessary machining and material waste for firearm manufacturers, and its optimal value and performance specifications are used for easier downstream manufacturing of firearm components, including:

  • Magazine tubes
  • Receivers
  • Barrels
  • Bolt actions
  • Slides
Automation

Automation

To meet the high-cycle demands of modern automation, Plymouth® welded stainless steel tubing is engineered for the precise dimensional stability and structural rigidity these systems require. Our ISO-certified manufacturing provides the process-ready reliability and material traceability essential for integrating precision components into complex automated environments. These applications include: Robotic actuation and fluid lines Conveyor and material handling frames Pneumatic sensor housing Automated assembly tooling

tubing

Life Sciences

Engineered for compatibility with laboratory and medical environments, Plymouth® welded stainless steel tubing provides the dimensional consistency required for various support and instrumentation applications. Our focus on manufacturing precision ensures a reliable material solution for equipment manufacturers who require strict adherence to project specifications in:

  • Laboratory hardware and frames
  • Diagnostic equipment components
  • Medical support structures
Secondary

Chemical Processing

Designed to withstand the rigors of caustic environments, Plymouth® welded stainless steel tubing offers a strategic balance of corrosion resistance and system longevity. Our manufacturing process ensures the material uniformity and specification compliance necessary for sustained performance in harsh conditions. Welded stainless steel tubing is used for critical chemical processing components, including:

  • Heat exchanger and condenser bundles
  • Chemical transfer and distribution lines
  • Process tank internal components
  • Industrial filtration systems
Nuclear

Nuclear Power

Welded stainless steel tubing is used in nuclear power plants due to its robust performance specifications. Our welded steel tubing adheres to ASME Section III – Class 1, 2, and 3 standards. Welded steel tubing is used in various nuclear power applications, including:

  • Feedwater heater tubing
  • Boiler and condenser tubing
  • Nuclear instrumentation
  • Heat exchangers
Space

Space

For complex, large diameter assemblies, Plymouth®’s welded steel tubing is used to support and build space propulsion components exposed to extreme environments. Some of these components include:

  • Instrumentation lines
  • Rocket components
  • Launch pads
  • Propulsion cooling circuits
  • Supply and air systems

Downloads & Resources

FileLanguageSizeDownload
Aerospace Tubing Sell Sheet EN989 KB Download
Plymouth Heat Exchanger Tubing EN419 KB Download
Selecting Tubing Materials for Power Generation Heat Exchangers EN265 KB Download
Plymouth® Product Catalog EN4 MB Download

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