L605 Alloy | L 605

Shapes Available

  • Round Bar
  • Sheet


  • Aerospace
  • Electrical
  • Manufacturing
  • Medical

Industry Names

  • L-605 Alloy
  • L605


  • Exotic
  • Specialty Steel


  • AMS 5759
  • ASTM F90
  • UNS R30605


  • Devices in High Fatigue Service
  • High Temperature Applications
  • Jet Engine Components


  • Superior Corrosion Resistance

Nickel Alloy L605 is a cobalt base, austenitic super-alloy. L-605 has high strength up to 1500 degrees F, good oxidation resistance up to 2000 degrees F, and good formability. In addition, this alloy has good resistance to wear and galling. This alloy can be used in high temperature kilns, sections of aircraft (such as hot sections of jet engines and afterburners) as well as industrial furnace applications. L605 is non-magnetic and has excellent corrosion resistance in the hot corrosive sections in jet engine applications. L605 has a high chromium content and is therefore resistant to corrosion in a wide degree of applications such as hydrochloric acid and nitric acid.

Higher strength can be achieved in L-605 by work hardening. L-605 is still non-magnetic after being work hardened. L-605 is typically used in the cold worked condition and a decent increase in hardness and strength can be achieved by aging of the cold worked material.

L- 605 is more difficult to machine than other austenitic stainless steels like 302, 304, 321, and 347.

The aerospace and marine industries can use L605 for turbines, industrial furnaces and liners in high temp kilns.

L605 is available in sheet and round bar. If there’s a shape in L605 that is needed and not available, call Michlin Metals today to inquire about custom processing. In addition, the product is produced under 2 other brand names Cobalt L605® and Haynes® 25. Looking for more info on L605? We’ve made a YouTube video all about the Cobalt Alloys, check it out.  There’s even a video just on L605, click here for transcript! You can see the video below:

Please contact us to request a quote. We specialize in hard to find material.

We work closely with many manufacturers in the aerospace & defense industry. We work with NADCAP approved heat treaters and testing laboratories. We can supply DFARS compliant material.

Metal Properties
.2% Yield Strength 60 ksi
Density 0.3333 lb/inch³
Elongation 60 %
Ultimate Tensile Strength 150 ksi
Chemical Composition
C- .1
Co- 53.0
Cr- 20.0
Fe- Bal
Mn- 1.7
Ni- 10.0
W- 15.0
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