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Titanium is immune to corrosive attack by salt water or marine atmospheres. It also exhibits exceptional resistance to a broad range of acids, alkalis, natural waters and industrial chemicals.
Titanium offers superior resistance to erosion, cavitation or impingement attack. Titanium is at least twenty times more erosion resistant than the copper nickel alloys.
Under "in service" conditions, the heat transfer properties of titanium approximate those of admiralty brass and copper nickel. There are several reasons for this:
- Titanium's higher strength permits the use of thinner walled equipment.
- There appear to be unusual and beneficial characteristics in titanium's inherent oxide film(*).
- The relative absence of corrosion in media where titanium is generally used leaves the surface bright and smooth for improved lamellar flow.
- Titanium's excellent erosion-corrosion resistance permits significantly higher operating velocities.
The densities of titanium-based alloys range between 0.160 Ib/in³ (4.43 gm/cm³) and 0.175 Ib/in³ (4.85 gm/cm³).
Yield strengths range from 25,000 psi (172 MPa) commercially pure (CP) Grade 1 to above 200,000 psi (1380 MPa) for heat treated beta alloys.
The combination of high strength and low density results in exceptionally favorable strength-to-weight ratios for titanium-based alloys. These ratios for titanium-based alloys are superior to almost all other metals and become important in such diverse applications as deep well tube strings in the petroleum industry and surgical implants in the medical field.