Grade 4
Commercially Pure Titanium
Material Data Sheet
Commercially Pure Titanium Grade 4 is the highest strength pure unalloyed titanium product. This titanium grade is used almost exclusively for airframe, aircraft engine parts, marine, surgical implants, hydraulic tubing. Good formability and corrosion resistance are its hallmark.
Chemical Composition
| Chemistry | Content % |
|---|---|
| Titanium, Ti | 99.0 |
| Iron, Fe | ≤ 0.5 |
| Oxygen, O | ≤ 0.4 |
| Carbon, C | ≤ 0.1 |
| Nitrogen, N | ≤ 0.05 |
| Hydrogen, H | ≤ 0.015 |
Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 4.51 g/cm3 | 0.163 lbs/in3 |
| Melting Point | ≤ 1660 °C | ≤ 3020 °F |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Brinell | 265 | 265 |
| Hardness, Knoop | 215 | 215 |
| Hardness, Rockwell B | 100 | 100 |
| Hardness, Rockwell C | 23 | 23 |
| Hardness, Vickers | 280 | 280 |
| Tensile Strength, Ultimate | 550 MPa | 79800 psi |
| Tensile Strength, Yield | 480 – 552 MPa | 69600 – 80100 psi |
| Elongation at Break | 15 % | 15 % |
| Reduction of Area | 30 % | 30 % |
| Modulus of Elasticity | 105 GPa | 15200 ksi |
| Compressive Modulus | 110 GPa | 16000 ksi |
| Ultimate Bearing Strength | 695 MPa | 101000 psi |
| Bearing Yield Strength | 830 MPa | 120000 psi |
| Poisson’s Ratio | 0.37 | 0.37 |
| Fatigue Strength | 250 MPa | 36300 psi |
| Fracture Toughness | 99 – 140 MPa-m½ | 90.1 – 127 ksi-in½ |
| Shear Modulus | 40 GPa | 5800 ksi |
Applications
- Airframe Components
- Cryogenic Vessels
- Heat Exchangers
- CPI Equipment
- Condenser Tubing
- Pickling Baskets
Key Words: ASTM Grade 4: UNS R50700, CP titanium, C.P. titanium alloy
