This superalloy is typically double melted to remove impurities. However, this melt practice is an enhancement of the standard melt practice for ASTM F562 material yielding much lower inclusion counts. This results in improved fatigue life of as-drawn wire by as much as 800%.
A reducing atmosphere is preferred for thermal treatment but inert gas can be used. 35N LT will fully anneal at 1010-1177°C in just a few minutes. For optimum mechanical properties, cold worked 35N LT should be aged at 583-593°C for four hours.
35N LT is an excellent combination of strength and corrosion resistance. Typically used in the coldworked condition, tensile strengths are comparable to 304. End uses in the medical field are pacing leads, stylets, catheters and orthopaedic cables.