Titanium Ti-5Al-2Sn-2Zr-4Mo-4Cr (Ti-17) Alpha-Beta Processed

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Titanium Ti-5Al-2Sn-2Zr-4Mo-4Cr (Ti-17) Alpha-Beta Processed
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Beta Titanium Alloy
Material Notes:	Information provided by Allvac and the references. Beta Transus 890ºC ; Alpha-Beta Alloy; Double Solution Treated 860ºC, 2h; 800ºC, 4h; Aged 620ºC, 8h. Applications: Compressor discs, heavy section forgings for gas turbine engine components. Characteristics: High tensile strength, good crack growth/fatigue resistance and good fracture toughness. Forms typically available: Billet and bar. 1 other heat treatment of this alloy is in MatWeb.
Key Words:	UNS R58650
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Physical Properties	Original Value	Comments

Density	4.65 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	369	Estimated from Rockwell C.
Hardness, Knoop	403	Estimated from Rockwell C.
Hardness, Rockwell C	40
Hardness, Vickers	386	Estimated from Rockwell C.
Tensile Strength	1000 MPa @Temperature 316 °C
Tensile Strength, Ultimate	1185 MPa
Tensile Strength, Yield	1140 MPa
Elongation at Break	8.0 %
Creep Strength	724 MPa @Temperature 316 °C, Time >=3.60e+6 sec	strain 0.2%
Rupture Strength	910 MPa @Temperature 316 °C, Time 3.60e+6 sec
Modulus of Elasticity	115 GPa
Notched Tensile Strength	1480 MPa	K_t (stress concentration factor) = 4.0
Poissons Ratio	0.33	Typical for alpha-beta titanium alloy.
Fatigue Strength	725 MPa @# of Cycles 100000	disk forging
	745 MPa @# of Cycles 5000	disk forging
Fracture Toughness	35.0 MPa-m½	K(IC)
Shear Modulus	43.2 GPa	Calculated from typical values.

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000160 ohm-cm	Estimated from similar alpha-beta titanium alloys.

Thermal Properties	Original Value	Comments
CTE, linear	8.50 µm/m-°C @Temperature 20.0 - 100 °C	Typical alpha-beta titanium alloy
	9.70 µm/m-°C @Temperature 20.0 - 400 °C	average
Specific Heat Capacity	0.525 J/g-°C	Typical value for titanium alloys.
Thermal Conductivity	7.80 W/m-K
Beta Transus	890 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	5.0 %
Chromium, Cr	4.0 %
Hydrogen, H	<= 0.0125 %
Iron, Fe	<= 0.30 %
Molybdenum, Mo	4.0 %
Nitrogen, N	<= 0.040 %
Oxygen, O	0.080 - 0.13 %
Tin, Sn	2.0 %
Titanium, Ti	83 %
Zirconium, Zr	2.0 %

References for this datasheet.

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MTP171 / 14227

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