ERTi-12
ERTi-12, Grade 12 (Ti 0.8Ni0.3Mo), is an intermediate strength grade originally developed to provide enhanced crevice-corrosion resistance in high temperature brines, but at lower cost than Grade 7. The improved performance is believed to be the result of Ni++ and Mo++ ions that alter the surface electrochemistry of the material in the crevice or under a surface deposit. Grade 12 has better elevated temperature properties than Grade 2 or 3 and is sometimes specified for pressure vessels or piping for its superior strength alone.
| Nominal Chemistry Composition (%) |
| Ti |
C |
O |
N |
H |
Fe |
Al |
V |
Pd |
Ru |
Ni |
X |
%X |
| BAL |
0.030 max |
0.08-0.16 |
0.015 max |
0.008 max |
0.15 max |
– |
– |
– |
– |
0.6-0.9 |
Mo |
0.2-0.4 |
| Minimum Mechanical Properties |
| Tensile Strength (MPa) |
483 |
| Yield Strength (MPa) |
345 |
