Grade 7 is mechanically and physically equivalent to Grade 2, except with the addition of the interstitial element palladium, making it an alloy. Grade 7 possesses excellent weldability and fabricality, and is the most corrosion resistance of all titanium alloys. In fact, it is most resistant to corrosion in reducing acids.
Grade 7 is used in chemical processes and production equipment components.
| Ti | Pd | N | Fe | O | H | C |
| ca % | % | % | % | % | % | % |
| 99.3 | 0.12-0.2 | 0.05 | 0.25 | 0.18 | 0.013 | 0.06 |
MECHANICAL PROPERTIES OF TITANIUM GRADE 7
| 0.2% Proof Stress | Tensile Strength | Elongation | |
| MPa | MPa | % | |
| Annealed | 275-475 | 345 | 20 |
PHYSICAL PROPERTIES OF TITANIUM GRADE 7
| Temperature Range | Material for wet corrosion |
| Melting Range | 1670°C |
| Density | 4.51 g/cm³ |
| ISO-V notch impact toughness at -59°C | Across < 62 J/cm² |
| lengthwise < 83 J/cm² |
TITANIUM GRADE 7 SPECIFICATION
Density: 0.163 lbs/in3 , 4.51 g/cm3
Mean Coefficient of Thermal Expansion, in/in/° F (mm/m/° C):
70 – 212
° F (20 – 100 ° C): 4.78 x 10-5 (8.6)
Thermal Conductivity: BTU-in/h-ft-° F (W/m-° K):
At 70 ° F (21 °C): 111 (16)
Modulus of Elasticity, ksi (MPa): 15.2 x 103 (105 x 103) in tension
Melting Point: 3040 ° F (1670 ° C)
USAGE & APPLICATION OF TITANIUM GRADE 7
Most of the applications of this grade are in the chemical industries. The most common uses are reactor autoclaves, piping and fittings, valves, heat exchangers and condensers.
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UAE, Bahrain, Italy, Indonesia, Malaysia, United States, Mexico, Jordan,
Vendula, Brazil, Peru, Nigeria, Kuwait, Oman,
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Germany, UK, Canada, Russia, Turkey, Australia, New Zealand, Sri Lanka,
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