B348 Standard Specification for Titanium and
Scope. 1.1 This specification 2 covers annealed titanium and titanium alloy bars and billets as follows: 1.1.1 Grade 1— UNS R50250. Unalloyed titanium, 1.1.2 Grade 2— UNS R50400. Unalloyed titanium, 1.1.2.1 Grade 2H— UNS R50400. Unalloyed titanium (Grade 2 with 58 ksi (400 MPa) minimum UTS), 1.1.3 Grade 3— UNS R50550.