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. % C Max 0.1   Fe Max 0.3   H Max 0.015   N Max 0.03   O Max 0.25   Pd 0.2   Ti 99

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

Physical Properties	Metric	English	Comments
Density	4.5 g/cc	0.163 lb/in³
Mechanical Properties
Hardness, Brinell	200	200	annealed
Hardness, Knoop	222	222	Estimated from Brinell.
Hardness, Rockwell B	75	75	annealed
Hardness, Rockwell C	11	11	Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers	209	209	Estimated from Brinell.
Tensile Strength, Ultimate	344 MPa	49900 psi
Tensile Strength, Yield	275 - 410 MPa	39900 - 59500 psi
Elongation at Break	20 %	20 %
Modulus of Elasticity	105 GPa	15200 ksi	In Tension
Compressive Modulus	110 GPa	16000 ksi
Poisson's Ratio	0.37	0.37
Shear Modulus	45 GPa	6530 ksi
Electrical Properties
Electrical Resistivity	5.5e-005 ohm-cm	5.5e-005 ohm-cm
Thermal Properties
Heat of Fusion	325 J/g	140 BTU/lb	High Purity Ti.
CTE, linear 20°C	8.6 µm/m-°C	4.78 µin/in-°F	0-100ºC
CTE, linear 250°C	9.2 µm/m-°C	5.11 µin/in-°F	Average over the range 0-315ºC
CTE, linear 500°C	9.7 µm/m-°C	5.39 µin/in-°F	0-540ºC; CTE is higher perpendicular to the c-axis
Specific Heat Capacity	0.523 J/g-°C	0.125 BTU/lb-°F	value is 0.67 J/g-ºC at 540ºC
Thermal Conductivity	16.4 W/m-K	114 BTU-in/hr-ft²-°F	annealed
Melting Point	Max 1665 °C	Max 3030 °F	Liquidus
Liquidus	1665 °C	3030 °F
Maximum Service Temperature, Air	425 °C	797 °F	Continuous use
Maximum Service Temperature, Air	540 °C	1000 °F	Intermittent Use
Beta Transus	913 °C	1680 °F
Optical Properties
Emissivity (0-1)	0.3	0.3	High purity Ti at 710°C
Reflection Coefficient, Visible (0-1)	0.56	0.56	High purity Ti; visible light.

References for this datasheet.