CP-1 Titanium is the lowest strength unalloyed (or Commercially Pure--CP) grade. Grade 1 is used in the applications where ductility is paramount, such as explosive cladding, loose linings, expanded metal, and deep drawing applications. It is also used in electrolytic applications like coated anode substrates for production of chlorine and sodium chlorate.
CP-2 Titanium is the "workhorse" of the industrial corrosion market and most common unalloyed (or Commercially Pure--CP) grade. Grade 2 is generally the most readily available in all product forms and has the lowest cost. It is used for process equipment like pressure vessels, columns, tanks, heat exchangers, shafts, blowers and fans, condenser tubing, valves, fittings, and pipe.
CP-3 Titanium is a higher strength unalloyed (or Commercially Pure--CP) grade. Grade 3 is used for process equipment, tubing and pipe. Grade 3 is not as readily available as CP-2, but should be considered in applications where its higher strength reduces metal thickness required, and where the quantity of metal justifies a mill purchase.
CP-4 Titanium is the highest strength unalloyed (or Commercially Pure--CP) grade. Grade 4 is rarely used in corrosion service, but has been used (under AMS Specifications) in aircraft components where its higher strength can reduce the weight of components like bulkheads and firewalls.
6AL-4V, Grade 5 (ERTi-5), commonly called "6-4," is the most common and widely used alloy grade due to its relatively low cost and good availability. It has a UTS of 130,000 psi [895 MPa] minimum, good weldability, and can be heat treated to a higher strength or toughness. Grade 5 is used in aircraft components such as landing gear, wing spars, and compressor blades. Its corrosion resistance is generally comparable to Grade 2 and it is often used in corrosion service where higher strength is required, particularly in shafts, high strength bolting, and keys.
ERTi-6 is discontinued, 5Al-2.5Sn, Alloy A110AT. Please contact us to inquire.
ERTi-7, Grade 7, has the same mechanical properties as Grade 2. The 0.12 wt% palladium addition improves corrosion performance under mildly reducing conditions or where crevice or under-deposit corrosion is a problem. ERTi-7 can be considered for welding Grade 2 or 16 where improved corrosion performance is desired.
3Al-2.5V, Grade 9, is a "half" alloy version of Grade 5 and is used for applications where better ductility, formability, and weldability are needed, but lower UTS is acceptable. Grade 9 can be produced in welded or seamless tube and pipe. It is used in applications like oil production tubulars and bicycle frames.
ERTi-11, Grade 11, has the same mechanical properties as Grade 1. The minimum 0.12 wt% palladium addition improves corrosion performance under mildly reducing conditions or where crevice or under-deposit corrosion is a problem. It is widely used in components for chlorine electrodes and for expensive cladding where enhanced corrosion performance is required. ERTi-11 can be considered for welding Grade 1 or 17 where improved corrosion performance is desired.
ERTi-12, Grade 12 (Ti 0.8Ni0.3Mo), is an intermediate strength grade originally developed to provide enhanced crevice-corrosion resistance in high temperature brines, but at lower cost than Grade 7. The improved performance is believed to be the result of Ni++ and Mo++ ions that alter the surface electrochemistry of the material in the crevice or under a surface deposit. Grade 12 has better elevated temperature properties than Grade 2 or 3 and is sometimes specified for pressure vessels or piping for its superior strength alone.
6Al-4VELI, Grade 23, is comparable in chemical composition to Grade 5, but slightly lower aluminum and lower levels of oxygen and other interstitial elements improve fabricability, weldability, and toughness. Grade 23 is used in many high strength industrial applications such as shafts where very high strength, but better toughness and fabricability than Grade 5 is desired. This grade is often specified for marine and offshore energy production components that are exposed to low temperature seawater due to higher fracture toughness values than Grade 5.
Ti 6-2-4-2 is an alpha-beta high temperature, heat-treatable material used in gas turbine component manufacture. The beta content is low, giving good weldability.
Ti 15-3-3-3 is a metastable beta titanium alloy. It is good for industrial and aerospace components, pressure vessels, fittings, tubing, fasteners.
Ti 13V-11Cr-3Al is good for stuff too.
Ti 8-1-1 (Ti-8Al-1Mo-1V) is designed for creep resistance up to 450°C, used primarily in engine applications such as forged compressor blades and disks. This alloy has a relatively high tensile modulus to density ratio compared to most commercial titanium alloys.
BETA C Ti-3Al-8V-6Cr-4Mo-4Zr (Ti-3-8-6-4-4) is a metastable beta alloy developed in the 1960s. Like other beta alloys, it is used when particularly high strengths are needed along with the light weight and corrosion resistance offered by titanium. BETA C has gained in popularity among beta alloys because it is one of the easier beta alloys to melt, exhibiting low segregation, and to process, exhibiting good working and heat treating properties. Depending on the application, BETA C can be used in either the solution annealed (ST) or the solution treated plus aged (STA) conditions. Increases in strength on the order of 40% are obtained by solution treating and aging.
BETA 21S Ti-15Mo-3Nb-3Al-0.2Si (Ti-15-3-3-0.2) Offers the good cold formability and weldability of a beta strip alloy, but with greatly improved oxidation resistance and creep strength. Aerospace applications include engine exhaust plug and nozzle assemblies. The alloy's resistance to aircraft hydraulic fluids, such as Skydrol, is excellent at all temperatures. It is well suited for metal matrix composites because it can be economically rolled to foil, is compatible with most fibers, and is sufficiently stable up to 816°C.
