L-605 AMS 5759
L-605 AMS 5759 available at Rockwell Industries is a cobalt-chromium-tungsten-nickel alloy. It has good formability, high strength to 1500°F, and good oxidation resistance to 2000°F. L605 is non-magnetic and has excellent resistance to hot and corrosive atmospheres. It is especially resistant to carburizing atmospheres up to 1600ºF. The high chromium content makes it resistant to corrosion in a wide range of environments such as wet chlorine, hydrochloric acid and nitric acid. For maximum ductility, fabricated components should be annealed 2150-2250°F followed by a rapid cooling.
Stock sizes: 0.250” to 2.500” diameter
Common Specifications:
- AMS 5759
- Pratt & Whitney LCS F-17
- General Electric GE S-400 / S-SPEC-35
- Rolls Royce Sabre
Industry Trade Names:
- Haynes 25 (trademarked Haynes International)
- Udimet L605 (trademarked Special Metals)
- ATI L605 (trademarked ATI Specialty materials)
- Cartech L605 (trademarked Carpenter Technology)
Common Applications:
- Jet engine components
- Land based gas turbine combustor liners
Heat treatment:
Bars shall be solution heat treated by heating to a temperature within the range 2150 to 2250 °F, holding at the selected temperature within ±25 °F for a time commensurate with section thickness, and cooling at a rate equivalent to an air cool or faster.
Hardness of bars 277 HB max.
Minimum tensile property requirements:
| Property | Value |
|---|---|
| Tensile Strength | 125 ksi (862 MPa) |
| Yield Strength at 0.2% Offset | 45.0 ksi (310 MPa) |
| Elongation in 4D | 30% |
Composition
| Element | Min. | Max. |
|---|---|---|
| Carbon | 0.05 | 0.15 |
| Manganese | 1.00 | 2.00 |
| Silicon | — | 0.40 |
| Phosphorus | — | 0.040 |
| Sulfur | — | 0.030 |
| Chromium | 19.00 | 21.00 |
| Nickel | 9.00 | 11.00 |
| Tungsten | 14.00 | 16.00 |
| Iron | — | 3.00 |
| Cobalt | remainder |
