Titanium Grade 7
Titanium Grade 7 (UNS R52400) is unalloyed titanium plus 0.12 to 0.25 % palladium (ASTM B348, 1.1.7). Its minimum tensile requirements in ASTM B348 Table 2 are the same as Grade 2: 50 ksi [345 MPa] tensile strength, 40 ksi [275 MPa] yield strength and 20 % elongation. The palladium addition raises corrosion resistance, especially in reducing acids, and Grade 7 keeps good weldability and fabricability.
Grade 7 is used in chemical processes and production equipment components.