Ti CP Grade 4 is the strongest grade of commercially pure titanium with good ductility, moderate formability, and has superior corrosion fatigue resistance in seawater. With the highest allowable oxygen and iron contents it combines the excellent resistance to corrosion and corrosion fatigue of titanium with high strength that makes it a candidate to compete with steels and nickel alloys for many applications. It has a minimum yield strength of 480 MPa (70 ksi) and applicable service temperatures up to 400°F (204°C). It has the highest allowable oxygen and iron content of the grades and can be considered in any application where strength and corrosion resistance are important.
Airframe and aircraft engine components, marine and chemical processing machinery, heat exchangers, reaction vessels for chemical processing and desalinization plants, corrosive waste disposal wells, and pulp and paper production.