[1] It is a metastable "beta alloy" which was originally developed in the 1960s; Ti-3Al-8V-6Cr-4Mo-4Zr, nominally 3% aluminum, 8% vanadium, 6% chromium, 4% molybdenum, 4% zirconium and balance (75%): titanium.
It is a heat-treatable, deep section hardenable, very high strength Titanium alloy possessing good toughness/strength properties, low elastic modulus and elevated resistance to stress and localized corrosion in high temperature sweet and sour brines.
The properties of Beta C have led to its use in a number of niche applications, including parts of aircraft landing gear and in fasteners used in the automotive industry.
Beta C is also used in oilfield applications such as pressure housings, shafts, valves and other critical components where very high strength and excellent corrosion resistance are required.
Beta C is composed primarily of titanium, with relatively large (3-8.5% each) additions of molybdenum, aluminium, zirconium, chromium and vanadium, and smaller amounts (0.3 - 0.005% each) of iron, hydrogen, nitrogen, oxygen, yttrium, carbon, and other elements.