Titanium Grade 3

Subcategory: Metal; Nonferrous Metal; Titanium Alloy; Unalloyed/Modified Titanium

Close Analogs: Titanium Grades 1,2,3,4,7,11,and 12 are all considered unalloyed and have similar mechanical properties.

Key Words: ASTM Grade 3; UNS R50550, CP titanium, C.P. titanium alloy

Component   Wt. %
CMax 0.1 
FeMax 0.3 
HMax 0.015 
N Max 0.05 
OMax 0.35 

Material Notes:
Information provided by Allvac and the references.

Applications: Airframe skin, heat exchangers, cryogenic vessels, components for CPI equipment, condenser tubing, exhaust pipe shrouds.

Physical PropertiesMetricEnglishComments
Density4.5 g/cc0.163 lb/in 

Mechanical Properties
Hardness, Brinell225225 annealed
Hardness, Knoop175175 unwelded sample
Hardness, Knoop220220 welded
Hardness, Rockwell B9090 annealed
Hardness, Rockwell C1616 Estimated from Brinell.
Tensile Strength, Ultimate440 MPa63800 psi 
Tensile Strength, Yield377 - 520 MPa54700 - 75400 psi 
Elongation at Break18 %18 % 
Reduction of Area35 %35 % 
Modulus of Elasticity105 GPa15200 ksi In Tension
Compressive Yield Strength450 MPa65300 psi 
Compressive Modulus110 GPa16000 ksi 
Ultimate Bearing Strength1000 MPa145000 psi Cold Worked
Bearing Yield Strength900 MPa131000 psi Cold Worked
Poisson's Ratio0.370.37 
Charpy Impact30 - 66 J22.1 - 48.7 ft-lb V-notch; also reported as 40 J
Fatigue Strength240 MPa34800 psi at 1E+7 cycles. R = -1
Fatigue Strength289 MPa41900 psi 1,000,000 Cycles
Fracture Toughness79 MPa-m71.9 ksi-in for K(Q) after anneal
Shear Modulus45 GPa6530 ksi 

Electrical Properties
Electrical Resistivity5.4e-005 ohm-cm5.4e-005 ohm-cm 

Thermal Properties
Heat of Fusion325 J/g140 BTU/lb High Purity Ti.
CTE, linear 20C8.6 m/m-C4.78 in/in-F 0-100C
CTE, linear 250C9.2 m/m-C5.11 in/in-F Average over the range 0-315C
CTE, linear 500C9.7 m/m-C5.39 in/in-F 0-540C; CTE is higher perpendicular to the c-axis
Specific Heat Capacity0.523 J/g-C0.125 BTU/lb-F value is 0.67 J/g-C at 540C
Thermal Conductivity19.9 W/m-K138 BTU-in/hr-ft-F 
Melting PointMax 1660 CMax 3020 F Liquidus
Liquidus1660 C3020 F 
Beta Transus920 C1690 F 

Optical Properties
Emissivity (0-1)0.30.3 High purity Ti at 710C
Reflection Coefficient, Visible (0-1)0.560.56 High purity Ti; visible light.

References for this datasheet.

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