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

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Titanium Ti-6Al-2Nb-1Ta-0.8Mo (Ti-621/0.8), Alpha-Annealed
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Near Alpha Titanium Alloy
Material Notes:	Alpha-annealed at 870ºC. 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	Original Value	Comments

Density	4.48 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	290	Estimated from Rockwell C.
Hardness, Knoop	315	Estimated from Rockwell C.
Hardness, Rockwell C	30
Hardness, Vickers	304	Estimated from Rockwell C.
Tensile Strength, Ultimate	830 MPa
Tensile Strength, Yield	710 MPa
Elongation at Break	11 %
Reduction of Area	30 %	Average of Longitudinal and Transverse
Tensile Modulus	115 GPa	Value for annealed sample
Compressive Yield Strength	790 MPa
Poissons Ratio	0.31
Fatigue Strength	170 MPa @# of Cycles 1.00e+7	K_t (stress concentration factor) = 3.0
	280 MPa @# of Cycles 1.00e+7	Unnotched
Fracture Toughness	99.0 MPa-m½	K_IC
Shear Modulus	43.9 GPa	Calculated
Shear Strength	580 MPa	Ultimate shear strength
Charpy Impact	42.0 J	V-notch

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000160 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	9.00 µm/m-°C @Temperature 20.0 - 615 °C	average
	9.20 µm/m-°C @Temperature 20.0 - 93.0 °C
Specific Heat Capacity	0.552 J/g-°C
Thermal Conductivity	6.40 W/m-K
Melting Point	<= 1650 °C
Liquidus	1650 °C
Beta Transus	1110 °C

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

References for this datasheet.

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MTA182 / 14118

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