Welded Nickel Alloy Tubing

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Welded Tubing Built for Extreme Service

When elevated temperatures and harsh, corrosive chemicals go beyond what standard stainless steel grades can handle, Plymouth®’s welded nickel alloy tubing provides the higher performance margin and corrosion resistance than stainless steel. Welded nickel alloy tubing is also a more cost-effective means of achieving these performance specifications than seamless tubing alternatives.

Plymouth® manufactures welded nickel alloy tubing to customer specifications and engineered for consistency and long-term reliability in critical-service environments. As a specialty tubing manufacturer since 1924, we help OEMs and fabricators reduce risk with proven processing methods, dedicated customer support for engineering and design, and strict quality assurance measures.

Carbon Alloy

Welded Tubing Built for Extreme Service

When elevated temperatures and harsh, corrosive chemicals go beyond what standard stainless steel grades can handle, Plymouth®’s welded nickel alloy tubing provides the higher performance margin and corrosion resistance than stainless steel. Welded nickel alloy tubing is also a more cost-effective means of achieving these performance specifications than seamless tubing alternatives.

Plymouth® manufactures welded nickel alloy tubing to customer specifications and engineered for consistency and long-term reliability in critical-service environments. As a specialty tubing manufacturer since 1924, we help OEMs and fabricators reduce risk with proven processing methods, dedicated customer support for engineering and design, and strict quality assurance measures.

Optimal Value and Premier Performance 

Like our welded stainless tubes, Plymouth®’s welded nickel alloy tubing is designed to deliver a repeatable, high-integrity product while providing a cost-effective alternative to seamless tubing, especially when customers need custom sizes and controlled mechanical properties. 

Other key advantages include: 

  • Custom-Engineered Sizing: Our welding process supports close dimensional control for an exact fit. 
  • Material Selection Support: Plymouth®’s engineering team helps you match alloy performance to the corrosion mechanism and total installed cost. 
  • Value-Added Services: Options such as special testing/NDT and packaging support your production flow and quality requirements. 
  • Designed for Repeatability: Consistent tube-to-tube performance helps reduce downstream variation in forming, assembly, and service life. 

Welded Nickel Alloy Pressure Tubing Specifications

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

-249 Welded Austenitic Tubing Boiler, Superheater and Heat Exchanger Tubing

  • 304/L, 316/L, 317/L, 347, others
  • Also available in H and N grades.
  • 0.125” – 4.000”
  • 3.175mm – 101.6mm
  • 0.016” – 0.218”
  • 0.4064mm – 5.54mm
  • 48’ – 130’
  • 14.63m – 39.63m

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.

Industrial Applications

Aerospace Tubing

For cost-effective aerospace tubing requiring higher stress tolerance and corrosion resistance than stainless steel, our welded nickel alloy tubing provides the mechanical properties and dimensional tolerances while meeting aerospace industry safety standards. The specifications for each grade of welded nickel alloy aerospace tubing are available in our aerospace tubing sell sheet.

Space Propulsion

Welded nickel alloy tubing delivers the same high-performance of our seamless nickel tubing for an optimal value, providing stable performance when exposed to sustained high temperatures and corrosive environments. This gives manufacturers a cost-effective, high-quality Plymouth® product for constructing space propulsion components.

Markets for Welded Nickel Alloy Tubing

Aerospace tubing

Aerospace

Welded nickel alloy tubing surpasses stainless steel’s resistance and durability specifications for use in extreme conditions and is custom engineered to exact specifications and compliance with aircraft safety standards. Welded nickel alloy tubing is found in aerospace components including:

  • Helicopter parts
  • Fuselage chords
  • Thrust reversers
  • Engine pylons
  • Bomb and missile racks
Defense

Defense

Surpassing standard stainless capabilities, Plymouth® welded nickel alloy tubing delivers the enhanced corrosion resistance and high-temperature stability required for mission-critical defense environments. Custom-engineered to meet rigorous MIL-SPEC and AMS compliance, this high-volume solution supports defense infrastructure including:

  • Maritime fluid systems
  • Tactical propulsion
  • Strategic ground assets
  • Aerospace infrastructure
tubing

Life Sciences

For high-purity medical and pharmaceutical environments, our welded nickel alloy tubing offers superior chemical stability and surface quality compared to standard materials. Engineered to strict ASTM and ASME specifications, it ensures the precise tolerances and contamination control required for sensitive diagnostic applications including:

  • Diagnostic probe assemblies
  • Pharmaceutical infrastructure
  • High-purity fluid handling
  • Thermal management
Secondary

Chemical Processing

Corrosion defense and long-term durability are critical for maintaining system uptime in caustic environments. Our welded nickel alloys provide a high-integrity barrier against chemical stress in high-output facilities for:

  • Reactor and vessel components
  • Chemical injection systems
  • Heat transfer systems
  • High-flow process essentials
  • Instrumentation components
Nuclear

Nuclear Power

To meet the stringent safety requirements of nuclear power generation, materials must withstand the compounding effects of high pressure and thermal stress. Plymouth® welded nickel alloy tubing provides the specialized mechanical properties and corrosion resistance necessary for long-term operational safety in nuclear systems.

Space

Space

Plymouth® welded nickel alloy tubing provides a high-value alternative for space propulsion, launch systems, and orbital components exposed to extreme thermal cycles. This tubing is engineered to meet precise dimensional standards for use in the demanding environments of space-flight infrastructure and in propulsion hardware:

  • Propulsion cooling circuits
  • Rocket components
  • Structural components
  • Instrumentation lines
  • Launch pad equipment
  • Air tubes

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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