ATI 38-644™ beta titanium Alloy (UNS R58640) is equivalent to Beta C™* (Ti-3Al-8V-6Cr-4Mo-4Zr). This grade is a metastable beta titanium alloy known for its exceptional ductility in the solution treated (annealed) condition, and for its high strength and ductility in the solution treated and aged condition (STA) condition. Improved tensile properties can be achieved, while maintaining good ductility and a low modulus of elasticity. Fatigue strength is also good in the STA condition.

This alloy is produced by one of two basic primary melting methods: vacuum arc (VAR) or plasma arc cold-hearth melting (PAM). Primary melting is followed by a vacuum arc remelt. Typical product forms are forged billet, rolled bar, rolled and/ or drawn rod and wire. These products find applications in high strength aerospace and commercial applications, structural parts, gas and petroleum down-hole piping systems and tooling, and high strength coil springs and fasteners. ATI 38-644™ alloy can be used for extended periods in elevated temperature environments below 660°F (349°C).