Aerospace Tubing

Aerospace Tubing

Plymouth® Tubing Applications in Aerospace

Failure is not an option in aerospace applications, which is why Plymouth® is trusted throughout the industry for tubing that meets or exceeds stringent industry standards. For 100 years, we’ve manufactured American-made, seamless and welded aerospace tubing, and near-net titanium extrusions engineered for tremendous quality, consistency, and high performance across a wide range of materials. Plymouth® tubing products are used to construct various types of aerospace tubing, including:

  • Fuel system tubing
  • Pneumatic tubing
  • Engine and exhaust tubing
  • Structural tubing
  • Cooling and heat exchanger tubing
Aerospace tubing

Plymouth® Tubing Applications in Aerospace

Failure is not an option in aerospace applications, which is why Plymouth® is trusted throughout the industry for tubing that meets or exceeds stringent industry standards. For 100 years, we’ve manufactured American-made, seamless and welded aerospace tubing, and near-net titanium extrusions engineered for tremendous quality, consistency, and high performance across a wide range of materials. Plymouth® tubing products are used to construct various types of aerospace tubing, including:

  • Fuel system tubing
  • Pneumatic tubing
  • Engine and exhaust tubing
  • Structural tubing
  • Cooling and heat exchanger tubing

Shaped Extrusions for Aerospace Applications

Our titanium extrusions are also broadly used in aerospace applications for its enhanced corrosion resistance, stress endurance, and dimensional accuracy. Titanium Extrusions and engineered shapes used to produce aerospace components including:

  • Seat tracks
  • Helicopter parts
  • Fuselage chords
  • Bomb and missile racks
  • Vertical stabilizer spars
  • Engine pylons
  • Thrust reversers
  • Wing mounts
  • Nacelle and engine mounts
  • Longerons

Seamless Aerospace Tubing Specifications

Aircraft SpecificationsGradesOD RangeWall RangeMaximum Length

AMS 5564, AMS 5565, AMS 5567, AMS 5569, MIL-T-5695 

304/L 

0.125” – 3.000”

3.175mm – 76.2mm

 

 

0.016” – 0.218”

0.4064mm – 5.54mm

48ft – 60ft

14.63m – 18.29m

AMS 5573, AMS 5584 1/8 hard 

316/L 

0.125” – 3.000”

3.175mm – 76.2mm

 

 

0.016” – 0.218”

0.4064mm – 5.54mm

48ft – 60ft

14.63m –18.29m

AMS 5557, AMS 5570, AMS 5896, AMS 5897 

321

0.125” – 3.000”

3.175mm – 76.2mm

 

 

0.016” – 0.218”

0.4064mm – 5.54mm

48ft – 60ft

14.63m – 18.29m

AMS 5557 

347 

0.125” – 3.000”

3.175mm – 76.2mm

 

 

0.016” – 0.218”

0.4064mm – 5.54mm

48ft – 60ft

14.63m – 18.29m

AMS 5581 

625 

0.125” – 3.000”

3.175mm – 76.2mm

0.016” – 0.218”

0.4064mm – 5.54mm

48ft – 60ft

14.63m – 18.29m

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 for Stainless Steel Aerospace Tubing

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

The specifications for each grade of seamless and welded stainless steel and nickel alloy steel in aerospace tubing are available in our aerospace tubing sell sheet.

Plymouth® Products used for Aerospace Tubing

ProMoly®: Seamless 4130 Steel Tubing

ProMoly® is our proprietary chromoly tubing used to manufacture seamless aerospace tubing whose specifications surpass AMS standards. In addition, ProMoly® is used to make shaped 4130 Streamline Tubing for aircraft components.

ProMoly® Specifications Versus the AMS 6360 Standard

SpecificationMinimum Yield StrengthMinimum Tensile StrengthMinimum Elongation in 2”

ProMoly®

95,000 psi

105,000 psi

15%

AMS 6360 

75,000 psi 

95,000 psi 

10–12%

ProMoly® Seamless 4130 Steel Specifications

MeasurementInches/FeetMetric

OD Range

 

0.250” – 2.000”

6.35mm – 50.8mm

Minimum OD Tolerance 

+/- 0.005” (up to 1.500” OD) 

+/- 0.127mm (up to 38.1mm)

Maximum OD Tolerance 

+/- 0.10” (above 1.500” OD) 

+/- 2.54mm (above 38.1mm)

Wall Range 

0.025” – 0.187” 

0.635mm – 4.75mm

Minimum Wall Tolerance 

+/- 10% (For IDs over 0.500”)

+/- 10% (For IDs over 12.7mm)

Maximum Wall Tolerance 

+/- 15% (for IDs under 0.500”) 

+/- 15% (for IDs under 12.7mm)

Maximum Length 

26’ 

7.9m

Industry Specifications and Certifications

  • Grade: 4130
  • Industry Specifications: AMS-T-6736A | AMS-6371 | AMS-6360 | MIL-T-6736B
  • Certifications:  ISO 9001 

Titanium Extrusions

Titanium near-net extrusions provide aerospace components with an improved buy-to-fly ratio, compatibility with composite materials, and high fatigue resistance.

Titanium Extrusion Specifications

Available Titanium Grades

6AL-4V

6AL-6V-2SN

6AL-2SN-4ZR 2MO*

Other grades available upon request.

Outside Dimensions

Shape cross-section must fit within 7.75” (196.8mm) diameter

 *Shape cross-section must fit within 6” (152.4mm) diameter

Industry Specifications 

AMS 4935

AMS 4975

DMS 1650

AMS-T-81556A

AMS 4921

MMS 1202

AIMS 03-18-011

Seamless Stainless Steel Tubing

Plymouth® manufactures stainless seamless tubing in a variety of grades, all of which are compliant with SAE International aerospace standards. 

Seamless Stainless Steel Alloys: 

  • Austenitic: 304/L/N, 316/L/N, 317/L, 321, 347 
  • Duplex/Lean Duplex: 2101, 2205, 2507 
  • Nickel Alloy: 600, 625, 800, 825 

Seamless Nickel Alloy Tubing

For aerospace tubing requiring higher stress tolerance and corrosion resistance than stainless steel can provide, our seamless nickel alloy tubing is the right choice for aerospace tubing used in harsh operating environments.

Welded Nickel Alloy Tubing

Welded nickel alloy tubing provides the same higher corrosion resistance and stress tolerance as seamless nickel alloy but is a more cost-effective alternative for use in aerospace tubing.

Welded Stainless Steel Tubing

Our welded stainless steel aerospace tubing is manufactured at our Trent production facility to meet aircraft industry specifications and offers the repeatable mechanical properties and dimensional control required for aerospace applications.

Welded Stainless Steel 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

Downloads & Resources

FileLanguageSizeDownload
Plymouth® Product CatalogEN4 MB Download
Aerospace Tubing Sell SheetEN989 KB Download
ProMoly® BrochureEN3 MB Download
Streamline 4130 TubingEN144 KB Download
Extruded Engineered Shapes and Cold Drawn ShapesEN406 KB Download
Aerospace Shapes BrochureEN399 KB Download
VideoWatch
Fabricating, Bending, Welding 4130 Tubing Watch
Specifying ProMoly® is a Seamless Decision Watch
ProMoly® 4130 Cold Drawn Seamless Tubing Watch
Titanium Extrusion Manufacturing Process Watch
Plymouth Engineered Shapes at Plymouth® | Manufacturing Capabilities & Facility Overview Watch
Plymouth® – Tubing and Shapes You Can Trust Watch

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