Titanium IMI 834

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Titanium IMI 834
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Near Alpha Titanium Alloy
Material Notes:	Heat Treatment: 1015ºC 2 hr; oil quench; 700ºC 2 hr; air cool. Characteristics: Near-alpha alloy, mid-range strength, good elevated temperature properties, good fatigue resistance. Applications: Aerospace - compressor discs and blades.
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Physical Properties	Original Value	Comments

Density	4.55 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	326	Estimated from Rockwell C.
Hardness, Knoop	354	Estimated from Rockwell C.
Hardness, Rockwell C	35
Hardness, Vickers	350
Tensile Strength, Ultimate	1050 MPa
Tensile Strength, Yield	925 MPa
Elongation at Break	12 %
Reduction of Area	15 %
Modulus of Elasticity	120 GPa
Poissons Ratio	0.31	Typical for alpha titanium alloy.
Fatigue Strength	340 MPa @# of Cycles 1.00e+7	k_t = 2.0, wrought 50 mm diameter bar.
	530 MPa @# of Cycles 400000	k_t = 2.0, heat treated bar, axial stress
	530 MPa @# of Cycles 1.00e+7	Unnotched
	900 MPa @# of Cycles 10000	heat treated bar, axial stress, Unnotched
Fracture Toughness	45.0 MPa-m½
Shear Modulus	45.8 GPa	Calculated from typical values.
Charpy Impact	15.0 J	V-notch

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

Thermal Properties	Original Value	Comments
CTE, linear	10.6 µm/m-°C @Temperature 20.0 - 200 °C
	10.9 µm/m-°C @Temperature 20.0 - 400 °C	average
	11.0 µm/m-°C @Temperature 20.0 - 600 °C	average
	11.3 µm/m-°C @Temperature 20.0 - 1000 °C
Specific Heat Capacity	0.525 J/g-°C	Typical value for titanium alloys.
Thermal Conductivity	7.00 W/m-K	Estimated from similar titanium alloys.
Beta Transus	1045 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	5.8 %
Molybdenum, Mo	0.50 %
Niobium, Nb (Columbium, Cb)	0.70 %
Silicon, Si	0.35 %
Tin, Sn	4.0 %
Titanium, Ti	85 %
Zirconium, Zr	3.5 %

References for this datasheet.

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