Titanium Ti-6Al-2Nb-1Ta-0.8Mo (Ti-621/0.8), STA

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Titanium Ti-6Al-2Nb-1Ta-0.8Mo (Ti-621/0.8), STA
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Near Alpha Titanium Alloy
Material Notes:	Solution Treated 990ºC, Aged 595ºC. Alpha Alloy. High toughness, excellent weldability, resistance to corrosion in salt water. Increasing oxygen impurity results in increasing beta transus and decreasing grain size. Applications: Submersible hulls, pressure vessels 3 other heat treatments of this alloy are in MatWeb.
Key Words:	Ti-621/0.8; UNS R56210; Ti-6211
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Physical Properties	Metric	English	Comments

Density	4.48 g/cc	0.162 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	30	30
Tensile Strength, Ultimate	900 MPa	131000 psi
Tensile Strength, Yield	790 MPa	115000 psi
Elongation at Break	11 %	11 %
Reduction of Area	24 %	24 %	Average of Longitudinal and Transverse
Tensile Modulus	115 GPa	16700 ksi	Value for annealed sample
Poissons Ratio	0.31	0.31
Shear Modulus	43.9 GPa	6370 ksi	Calculated
Charpy Impact	37.0 J	27.3 ft-lb	V-notch

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.000160 ohm-cm	0.000160 ohm-cm

Thermal Properties	Metric	English	Comments
CTE, linear	9.00 µm/m-°C @Temperature 0.000 - 650 °C	5.00 µin/in-°F @Temperature 32.0 - 1200 °F	average
	9.20 µm/m-°C @Temperature 20.0 - 93.0 °C	5.11 µin/in-°F @Temperature 68.0 - 199 °F	annealed
Specific Heat Capacity	0.552 J/g-°C	0.132 BTU/lb-°F
Thermal Conductivity	6.40 W/m-K	44.4 BTU-in/hr-ft²-°F
Melting Point	<= 1650 °C	<= 3000 °F
Liquidus	1650 °C	3000 °F
Beta Transus	1110 °C	2030 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	6.0 %	6.0 %
Carbon, C	<= 0.030 %	<= 0.030 %
Hydrogen, H	<= 0.10 %	<= 0.10 %
Iron, Fe	<= 0.12 %	<= 0.12 %
Molybdenum, Mo	0.80 %	0.80 %
Niobium, Nb (Columbium, Cb)	2.0 %	2.0 %
Nitrogen, N	<= 0.020 %	<= 0.020 %
Other, each	<= 0.10 %	<= 0.10 %
Other, total	<= 0.40 %	<= 0.40 %
Oxygen, O	<= 0.10 %	<= 0.10 %
Tantalum, Ta	1.0 %	1.0 %
Titanium, Ti	90 %	90 %

References for this datasheet.

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MTA184 / 14120

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