DESCRIPTION 
Titanium Grade 3, UNS R50550, is a commercially pure, unalloyed titanium grade that provides higher strength than Titanium Grades 1 and 2 while maintaining good ductility, weldability and corrosion resistance. Grade 3 is a medium-strength commercially pure titanium grade used when greater load-bearing capability is required without moving to an alloyed titanium grade. It offers excellent resistance in many oxidizing, neutral and mildly reducing environments, including seawater, chlorides, chemical processing media and marine atmospheres. 

PRODUCT FORMS 
Sheet, Strip, Plate 
 
SPECIFICATIONS 
ASTM B265, ASME SB-265, AMS 4900 
 
TYPICAL APPLICATIONS 
Chemical processing equipment, heat exchangers, condenser tubing and plates, marine components, desalination equipment, reactor vessels, pressure vessels, piping systems, tanks, aerospace and airframe components, cryogenic vessels, medical components and lightweight fabricated parts requiring higher strength than Grade 2. 
 
PROCESSING 
Titanium Grade 3 is typically supplied in the annealed condition for sheet, strip and plate. It is not hardenable by heat treatment, but it can be strengthened by cold work. Annealing may be used after forming or cold working to restore ductility, improve dimensional stability and reduce residual stresses. 
 
FORMING 
Grade 3 has good formability, but it is stronger and less formable than Titanium Grades 1 and 2. Higher forming forces may be required, and intermediate annealing may be useful for more severe cold forming operations. It can be bent, roll formed, stamped and drawn when proper tooling and forming practices are used. 
 
WELDING 
Titanium Grade 3 is readily weldable by standard titanium welding processes when proper inert gas shielding is used. Weld areas must be protected from oxygen, nitrogen and hydrogen contamination at elevated temperatures to maintain ductility, corrosion resistance and clean weld quality. 
 
CORROSION 
Grade 3 titanium forms a stable, adherent titanium oxide film that provides excellent resistance to seawater, chlorides, oxidizing acids, alkaline environments and many industrial chemical services. Its combination of corrosion resistance, low density and higher strength makes it useful for marine, chemical processing, aerospace and heat transfer applications. 

PHYSICAL PROPERTIES 
Density @ RT: 0.163 lb./in^3; Modulus of Elasticity in Tension: approximately 15.2 psi x 10^6; Specific Heat: approximately 0.125 BTU/°F/lb.; Thermal Conductivity: approximately 9.5 to 12 BTU/hr-ft-°F at room temperature; Mean Coefficient of Thermal Expansion: approximately 4.8 x 10^-6 in./in./°F from 68 to 212°F; Electrical Resistivity: approximately 54 micro ohm-cm at room temperature; Melting Point Range: approximately 3020 to 3034°F. 

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