L605 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.
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:
|Tensile Strength||125 ksi (862 MPa)|
|Yield Strength at 0.2% Offset||45.0 ksi (310 MPa)|
|Elongation in 4D||30%|