Titanium Grade 7, Annealed


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 7; UNS R52400, CP titanium, C.P. titanium alloy

Component   Wt. %
CMax 0.1 
FeMax 0.3 
HMax 0.015 
N Max 0.03 
OMax 0.25 
Pd0.2 
Ti99 

Material Notes:
Titanium Grade 11 is identical (0.2% Pd) except for impurity limits. Pd added for corrosion resistance. Sample was annealed 2 hr at 700C.

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

Mechanical Properties
Hardness, Brinell200200 
Hardness, Knoop222222 Estimated from Brinell.
Hardness, Rockwell B9898 
Hardness, Rockwell C1111 Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers209209 Estimated from Brinell.
Tensile Strength, Ultimate430 MPa62400 psi 
Tensile Strength, Yield340 MPa49300 psi 
Elongation at Break28 %28 % 
Modulus of Elasticity103 GPa14900 ksi in tension.
Compressive Yield Strength340 MPa49300 psi 
Notched Tensile Strength720 MPa104000 psi Kt (stress concentration factor) = 3.0
Ultimate Bearing Strength930 MPa135000 psi e/D = 2
Bearing Yield Strength660 MPa95700 psi e/D = 2
Poisson's Ratio0.340.34 
Charpy Impact65 J47.9 ft-lb V-notch
Fatigue Strength240 MPa34800 psi at 1E+7 cycles. Kt (stress concentration factor) = 2.7
Fatigue Strength280 MPa40600 psi Unnotched at 1E+7 cycles.
Shear Modulus39 GPa5660 ksi 
Shear Strength380 MPa55100 psi Ultimate shear strength

Electrical Properties
Electrical Resistivity5.5e-005 ohm-cm5.5e-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 20-93C
CTE, linear 250C9.2 m/m-C5.11 in/in-F Unspecified heat treatment. Average over the range 0-315C
Specific Heat Capacity0.523 J/g-C0.125 BTU/lb-F 
Thermal Conductivity16.4 W/m-K114 BTU-in/hr-ft-F 
Melting PointMax 1665 CMax 3030 F Liquidus
Liquidus1665 C3030 F 
Maximum Service Temperature, Air425 C797 F Continuous use
Maximum Service Temperature, Air540 C1000 F Intermittent Use
Beta Transus913 C1680 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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