Grade 12 titanium holds an “excellent” rating for its high quality weldability. It is a highly durable alloy that provides a lot of strength at high temperatures. Grade 12 titanium possesses characteristics similar to 300 series stainless steels.
This alloy can be hot or cold formed using press brake forming, hydropress forming, stretch forming or drop hammer method. Its ability to be formed in a variety of ways makes it useful in many applications. This alloy’s high corrosion resistance also makes it invaluable to those manufacturing equipment where crevice corrosion is a concern. Grade 12 can be used in the following industries and applications:
Chemical Data:
| Carbon | 0.08 max |
| Hydrogen | 0.015 max |
| Iron | 0.3 max |
| Molybdenum | 0.2 - 0.4 |
| Nickel | 0.6 - 0.9 |
| Nitrogen | 0.03 max |
| Oxygen | 0.25 max |
| Titanium | Balance |
Principle Design Features: This near-alpha alloy combines excellent strength at high temperatures with excellent weldability and crevice corrosion resistance. Beta Transus (F +/- 25) 1634.
Applications: Generally employed in elevated temperature chemical manufacturing equipment where crevice corrosion is a concern. Also applied to a variety of marine and airframe components.
Machinability: As a family, titanium and its alloys have developed a mystique as a nightmare to machine. This is simply not the case. Experienced operators have compared its characteristics to those found in 316 stainless steel. Recommended practice includes high coolant flow(to offset the material's low thermal conductivity), slow speeds and relatively high feed rates. Tooling should be tungsten carbide designations C1-C4 or cobalt type high speed tools.
Forming: May be hot or cold formed using hydropress, power brake, stretch or drop hammer methods. Similar in characteristics to 300 series stainless steels.
Welding: Rated as "excellent" in terms of weldability.
Heat Treatment: Not hardenable by heat treatment.
Forming: Rough work at 871 C (1600 F), finish at 788-843 C (1450-1550 F)
Hot Working: Hot forming will reduce both the springback and required forming forces, and will increase the overall ductility of the material.
Cold Working: The cold work characteristics of this material is similar to that of a moderately tempered austenitic stainless steel. In multiple cold forming operations, intermediate stress relief is recommended to prevent tearing or other material damage. Post-work annealing is required to reattain optimum performance characteristics.
Annealing: Heat to 732-816 C (1350- 1500 F),hold for 2 hours follow by air cooling. For intermediate stress relieving, heat to 538-649 C(1000-1200 F) and hold for 1 hour followed by air cooling.
Other Physical Props: Beta Transus (F +/- 25) 1634
Physical Data:
| Density (lb / cu. in.) | 0.163 |
| Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) | 0.13 |
| Electrical Resistivity (microhm-cm (at 68 Deg F)) | 52 |
| Melting Point (Deg F) | 3020 |
| Thermal Conductivity | 11 |
| Modulus of Elasticity Tension | 15 |
| Reduction of Area | 25 |