Titanium Density and Specific Heat by Grade
Typical density of common titanium grades
Titanium grades do not all have exactly the same density. Commercially pure titanium, including Grade 2 / UNS R50400, is commonly represented by a nominal density around 4.51 g/cm³. Ti-6Al-4V Grade 5 / UNS R56400 is commonly represented near 4.43 g/cm³. These values are appropriate for preliminary weight calculations, while the applicable product specification and certified dimensions govern an actual order.
The difference matters when estimating plate, bar, tube or finished-component mass. For accurate purchasing calculations, use the nominal density for the specified grade together with the actual dimensional tolerances. A generic “titanium” value can introduce error when a large quantity or tight weight limit is involved.
Specific heat changes with temperature
Specific heat is the energy required to raise the temperature of a unit mass of material. For titanium and its alloys it changes with temperature and can also vary with chemistry and condition. Room-temperature handbook data is useful for preliminary heat-balance calculations but should not be extended across a wide temperature range without grade-specific engineering data.
Thermal conductivity, expansion, emissivity, airflow, contact resistance and geometry also influence heating and cooling behavior. A density or specific-heat table alone cannot determine component temperature, cycle time or service life.
Grade 2 versus Grade 5
Grade 2 is commercially pure titanium valued for corrosion resistance, formability and a useful strength-to-weight balance. Grade 5 is an alpha-beta titanium alloy containing aluminum and vanadium and is selected where higher strength is required. They are not interchangeable: fabrication route, weldability, mechanical properties, service environment and controlling standards must all be reviewed.
Information required for a quote
Send the ASTM grade and UNS number, product form, governing standard and revision, dimensions, condition, quantity, tolerances, surface finish, testing and certificate requirements. For tube include OD, wall, length and seamless or welded construction. For machined parts or forgings include the drawing and inspection plan.
Related titanium products
Compare Titanium Grade 2, Titanium Grade 5 / Ti-6Al-4V and the complete titanium product catalog.
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