CP Titanium Grade 4 / Ti 70
Aircraft components, heat exchangers, cryogenic vessels, and surgical hardware.
CP Titanium Grade 4 is the strongest of the Commercially Pure Titaniums. It is known for excellent corrosion resistance, good formability, and weldability.
Aerospace, Chemical, Medical, and Marine
Fe: 0.50 max
O: 0.40 max
C: 0.08 max
N: 0.05 max
H: 0.0150 max
Density: 0.163 lb/in3, (4.51 g/cm3)
Modulus of Elasticity (E):
At 70°F (20°C): 16.3 x 103 ksi (112 GPa)
Modulus of Rigidity (G)
At 70°F (20°C): 5.9 x 103 ksi (41 GPa)
Coefficient of Expansion:
5.4 µin/in.-°F (70°F to 932°F)
9.7 µm/m-°C (20°C to 500°C)
Electrical Resistivity: 21 µΩ.in, (53.3 µΩ.cm)
Thermal Conductivity: 12.6 Btu-in/ft2hr-°F, (21.79 W/m-K)
Strip and Foil: AMS 4902, ASTM B265
Typical Mechanical Properties
- Heat Treatment: 1290°F
- Tensile Strength: 80 ksi (550 MPa) min 100 ksi (689 MPa) typ
- Suggested Operating Conditions: -300°F to 1000°F (-184°C to 540°C)
For further information Contact:
Limitation of Liability and Disclaimer of Warranty:
- The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only. It is not intended for engineering or design.
- Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., does not recommend or endorse any material for any particular end use or application.
- The data included in this data sheet are typical values and may vary.
- Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.
In no event will Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., be liable for any damages whatsoever arising from the use of the information included in the data sheets.
Additional Information on Titanium Grade 4
Much like its lower grade brethren, Grade 4 Titanium is extremely corrosion resistant, and shows a high level of weldability. Where it differs, however, is in its strength and ductility. Out of all of the pure grade titanium alloys, Grades 1 through 4, it is the strongest. However, it is the least ductile. This means that while it can withstand more punishment, it is not very easy to stretch out into wires or into thinner layers. This does not mean that the plate version of the alloy is not versatile though.
There are many places where you would need an alloy that is stronger, but you can sacrifice in its ductility. One industry that has made use of these properties is the medical field. You will find Titanium Grade 4 in a variety of different machines and instruments used in surgery and other medical areas. The medical field needs to have an alloy for their machines that is reliable, as human lives are at stake. They choose to use this alloy, which says something about how strong it is and what it can withstand.
Medicine is not the only area where you will find Grade 4 Titanium. Just like its counterparts, you will find it on any machine that is used in salt water environments. For instance, many aircraft carriers use Grade 4 Titanium on its husk. Due to the sheer size of the vessel, the plates used do not have to be hammered out or molded in a number of different shapes. However, because carriers are used in warfare, the strength of the alloy is greatly appreciated in case of an attack. It is not bulletproof by any means, but the extra strength goes a long way toward the weight of everything aboard the boat, and that it is normally at sea for longer periods of time compared to a boat made for personal use.