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

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Titanium Ti-6Al-2Nb-1Ta-0.8Mo (Ti-621/0.8), STA-1
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Near Alpha Titanium Alloy
Material Notes:	Beta Solution Treated 1035ºC, 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, Brinell	290	290	Estimated from Rockwell C.
Hardness, Knoop	315	315	Estimated from Rockwell C.
Hardness, Rockwell C	30	30
Hardness, Vickers	304	304	Estimated from Rockwell C.
Tensile Strength, Ultimate	930 MPa	135000 psi
Tensile Strength, Yield	800 MPa	116000 psi
Elongation at Break	10 %	10 %
Reduction of Area	21 %	21 %	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	32.0 J	23.6 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 20.0 - 650 °C	5.00 µin/in-°F @Temperature 68.0 - 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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MTA183 / 14119

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