Aerospace tubes

Tube & pipe

Safe, sustainable metallurgical solutions for aviation and space

Titanium. Stainless. Nickel alloys. For 70 years, we’ve delivered aerospacegrade alloys, seamless tubes, and engineering expertise that elevates safety, performance, and sustainability across aviation and space. Trusted by the world’s leading aircraft OEMs and modern space pioneers, our metallurgical solutions are built for the most demanding environments.

Fully certified value chain

From titanium and stainless steel to high-alloyed tubing, we deliver optimized, fully certified precision tubing solutions for the unique demands of aerospace applications. Manufactured in a fully integrated value chain – from our 250-strong R&D team and melt (80% recycled steel) to final tube – our materials ensure full traceability, from the furnace to the component used in your spacecraft.

Solving tough challenges with you

When needed, our materials experts bring space-grade ingenuity to solving complex, out-of-the-box challenges, from precision forming to tight-radius bending for spacecraft heat exchangers, hydrogen systems, and beyond. We thrive on finding the best solution together with you!

Typical tube applications

a plane with the names of the parts

Tube grade Type Main benefits Key applications
Titanium Grade 9
(Ti-3Al-2.5V)
Titanium Lightweight, outstanding fatigue resistance, excellent formability Hydraulic systems, airframe tubing, lightweight structures
Alleima® 21-6-9 
seamless
Seamless stainless steel High strength, excellent toughness in extreme temperatures Fuel lines, hydraulic tubing, structural components
Sanicro 625®
(Alloy 625)
Nickel-based superalloy High corrosion resistance, strength at elevated temperatures, excellent oxidation resistance Aerospace engine and exhaust systems, hightemperature fluid lines, corrosive environments

See full list of aerospace tubular grades in table below. For titanium, go here.

Titanium – a longtime core material

For years, we’ve supplied titanium tubing to leading aircraft OEMs for critical applications. Titanium Grade 9, for example, combines low weight with excellent fatigue resistance, insulation properties and corrosion resistance. Customers tell us they value our integrated production, responsible sourcing of sponge material and focus on consistency, precision, and full traceability.

NADCAP, AS9100:D and ISO 9001:215

We provide specialized services supporting hydraulic and fuel systems, control lines, structural components, and spacecraft systems – where reliability, strength, and low weight are critical. Backed by global manufacturing, tubing (AS9100:D and ISO 9001:2015), NADCAP certification, Green Mill status, and a fully integrated supply chain, we help you develop lighter, stronger, and more efficient aerospace and space systems – while enabling responsible, sustainable production.

Let's shape the future of aerospace together!

What’s next in your aerospace program? With a global team of 250 researchers specializing in metals and advanced materials, we are constantly looking around the corner to see what’s next. A case in point is our development of Alleima® 21-6-9 Aerospace Tubing in a higher-quality seamless version (no welds!) – previously considered impossible.

Supply chain security

During the global pandemic – and continuing through today’s geopolitical uncertainty – we’ve made significant advances in strengthening and “de-risking” our supply chains. With approved suppliers, trusted distributors and qualified backup options in place, we are well prepared to manage potential disruptions, including geopolitical challenges.

Feature story
A sustainable future of aerospace

A sustainable future of aerospace

Key differentiators will include lighter, stronger materials and more efficient engines.

Latest APT certification

Alleima Precision Tube LLC - AS9100_exp0826 (PDF, 331 kB)

Typical dimensions for aerospace applications range from 0.25 mm (0.010 in.) to 50.80 mm (2.0 in.) outside diameter.

The following list of grades and specifications is not exhaustive and individual customer specifications will also often be applied.

Seamless and redrawn

ASTM Grade Alleima grade UNS no. Condition Specifications
304 5R10 S30400 Hard AMS 5566/5564 
304 5R10 S30400 Hard MILT 5695
304 5R10 S30400 Hard LN 9396
304 5R10 S30400 Hard LN 9398
304 5R10 S30400 Annealed MILT 8504 
304L 3R12 S30403 Hard AMS 5569
304L 3R12 S30403 Hard or annealed AIR 9164
304L 3R12 S30403 Hard or annealed AIR 9160
304L 3R12 S30403 Annealed AIR 9423
304L 3R12 S30403 Annealed AIR 9424 
321 6R35 S32100 Annealed AMS 5645, AMS 5557/5570
321 6R35 S32100 Hard or annealed AIR 9164
321 6R35 S32100 Hard or annealed AIR 9160
321 6R35 S32100 Annealed AIR 9423
321 6R35 S32100 Annealed AIR 9424
321 6R35 S32100 Annealed BSI T67
321 6R35 S32100 Annealed LN 9396
321 6R35 S32100 Annealed MILT 8808
321/347 6R35/8R40 S34700 Annealed LN 9398
347 8R40 S34700 Annealed AMS 5571/5556 
347 8R40 S34700 Hard BSI T68
347 8R40 S34700 Annealed BSI T66
347 8R40 S34700 Annealed BSI T72
347 8R40 S34700 Annealed MILT 8808
304/304L 5R10/3R12 S30400/S30403 Hard MILT 6845 
304L/321/347 3R12/6R35/8R40 S30403/S32100/S34700 Annealed MILT 8606 
304L/316L/321/347 3R12/3R60/6R35/8R40 S30403/S32100/S34700 Hard MILT 8973
Alloy 625 - N06625 Annealed AMS 5581 
Alloy 718 - N07718 Annealed AMS 5590
Nickel 200 - N02200 Annealed

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