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Titanium – CP Grade Material

Commercially pure, or CP titanium is unalloyed titanium with purity range of 99.0% 99.4%. The term commercially pure (CP) titanium is applied to unalloyed titanium and designates several grades containing minor amounts of impurity elements, such as carbon, iron and oxygen. CP Ti Gr. 1 has the highest corrosion resistance, formability, and lowest strength, whereas, CP Ti Gr. 4 offers the highest strength with moderate formability.  The most commonly used grade is CP Ti Grade 2. The chemical compositions and physical properties of the four grades of CP titanium are listed below.
titanium_plate_1

 

Ti Gr 1 Ti Gr 2 Ti Gr 3 Ti Gr 4
 Nitrogen, max.  0.03  0.03  0.05  0.05
 Carbon, max.  0.10  0.10  0.10  0.10
 Hydrogen, max.  0.01  0.01  0.01  0.01
 Iron, max  0.20  0.30  0.30  0.50
 Oxygen, max.  0.18  0.25  0.35  0.40
 Titanium  bal.  bal.  bal.  bal.
 Yield strength (MPa)  170  275  380  485
 Ultimate strength (MPa)  240  345  450  550
 Elongation (%)  24  20  18  15