Commercially pure, or CP titanium is unalloyed titanium with a purity range of 99.0% to 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. Titanium Grade 2 has moderate strength with excellent cold formability, and weldability is widely available. CP Titanium’s mechanical properties are controlled by chemistry; specifically the input of Nitrogen, Oxygen, and Iron which will increase the strength of the material.

CP Grade 2 Titanium, JIS H 4600 TP340, TP270C, TP340C, TP340H, TB340 is the most commonly used grade in CP grades titanium. TP340, JIS Pure Titanium grade is having tensile strength of 340 ~ 510 MPa.

CP Titanium plat, block stockist distributor metal supplier
Chemical compositions of the four grades of CP titanium are listed below.
Ti Gr 1 Ti Gr 2 Ti Gr 3 Ti Gr 4
 Nitrogen, max.  0.03  0.03  0.05  0.05
 Carbon, max.  0.03  0.10  0.10  0.10
 Hydrogen, max.  0.03  0.01  0.01  0.01
 Iron, max  0.03  0.30  0.30  0.50
 Oxygen, max.  0.03  0.25  0.35  0.40
Titanium  0.03  bal.  bal.  bal.
 Yield strength (MPa)  0.03  275  380  485
 Ultimate strength (MPa)  0.03  345  450  550
 Elongation (%)  0.03  20  18  15

Commercially pure titanium is immune to general corrosion in seawater and brackish water to temperatures as high as 130 0C. Low levels of alloying additions such as palladium in the case of Grades 7, 11, 16 and 17 or Ni & Mo in the case of Grade 12 will extend general corrosion resistance to temperatures in excess of 260 Deg C.

Crevice corrosion
Commercially pure titanium (Grades 1, 2, and 3) is immune to crevice corrosion in aerated seawater to temperatures of at least 70 0C. In deaerated seawater commercially pure titanium will resist crevice corrosion to temperatures as high as 94 0C. When higher service temperatures are required or crevices cannot be engineered out of the process equipment titanium grades containing alloy addition can be applied to provide protection from crevice corrosion. Titanium grades containing additions of palladium such as Grades 7, 11, 16 and 17 or titanium Grade 12 containing small additions of nickel and molybdenum are economical choice to enhance protection from crevice corrosion. Titanium Grade 7 is used to fight crevice corrosion.

Titanium Grade 2 - Physical Properties
Density 0.163 lb/in3
Ultimate Tensile Strength 62.4 ksi
Yield Tensile Strength 49.3 ksi
Shear Modulus 5,510 ksi
Shear Strength 55.1 ksi
Fatigue Strength 40.6 ksi
Hardness Rockwell | Brinell B89 | 180
Elongation at Break Percentage 26%
Reduction of Area 34%
Modulus of Elasticity 14,800 ksi
Poisson's Ratio 0.34
Machinability Percentage 75%
Melting Point 2,930-3,020 °F
Specific Heat 1.3 x 10^-1 BTU/lb-°F
Thermal Conductivity 156 BTU-in/hr-ft^2-°F
Electrical Conductivity 3.6% IACS

JIS Standard Titanium

Material Form Standard Specification Process Density g/cm3
Sheet JIS H4600 TP270C Cold Rolling 4.51
Sheet JIS H4600 TP340C Cold Rolling 4.51
Plate JIS H4600 TP340H Hot Rolling 4.51
Bar JIS H4650 TB340C Cold Rolling 4.51
Bar JIS H4650 TB340H Hot Rolling 4.51
Bar JIS H4657 TF340 Forging 4.51
Heat Exchanger Pipe JIS H4631 TTH340W Welded 4.51
Piping JIS H4635 TTP340W Welded 4.51

Contact Titan Engineering Pte Ltd or our Jakarta Branch PT.Special Metals Indonesia for your titanium requirements.

Engineering Law: Any fabrication drawing must contain at least one part which is obsolete and two parts which are unobtainable.😊

Titanium – CP Grade Material

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