Titanium Grade 7

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 

Material Notes:
Titanium Grade 11 is identical (0.2% Pd) except for impurity limits. Pd added for corrosion resistance

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

Mechanical Properties
Hardness, Brinell200200 annealed
Hardness, Knoop222222 Estimated from Brinell.
Hardness, Rockwell B7575 annealed
Hardness, Rockwell C1111 Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers209209 Estimated from Brinell.
Tensile Strength, Ultimate344 MPa49900 psi 
Tensile Strength, Yield275 - 410 MPa39900 - 59500 psi 
Elongation at Break20 %20 % 
Modulus of Elasticity105 GPa15200 ksi In Tension
Compressive Modulus110 GPa16000 ksi 
Poisson's Ratio0.370.37 
Shear Modulus45 GPa6530 ksi 

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 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 Conductivity16.4 W/m-K114 BTU-in/hr-ft-F annealed
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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