Titanium IMI 829 (Ti-5.5Al-3.5Sn-3Zr-1Nb-0.25Mo-0.3Si)

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Titanium IMI 829 (Ti-5.5Al-3.5Sn-3Zr-1Nb-0.25Mo-0.3Si)
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Near Alpha Titanium Alloy
Material Notes:	Heat treatment: Beta heat treated at 1050 °C, Air Cooled and aged 2 hours at 625 °C Characteristics: Near-alpha alloy, medium strength, good high temperature properties, high creep resistance. Applications: Aerospace - engine compressors, discs and blades.
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Physical Properties	Metric	English	Comments

Density	4.54 g/cc	0.164 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	32	32
Hardness, Vickers	320 @Load 20.0 kg	320 @Load 44.1 lb
Tensile Strength	>= 930 MPa	>= 135000 psi
Tensile Strength, Yield	>= 820 MPa	>= 119000 psi	0.2% offset
Elongation at Break	>= 9.0 %	>= 9.0 %	on 5D
Reduction of Area	15 %	15 %
Tensile Modulus	85.0 GPa @Temperature 600 °C	12300 ksi @Temperature 1110 °F	dynamic
	110 GPa @Temperature 200 °C	16000 ksi @Temperature 392 °F	dynamic
	125 GPa @Temperature 23.0 °C	18100 ksi @Temperature 73.4 °F	dynamic
Fracture Toughness	75.0 MPa-m½	68.3 ksi-in½

Thermal Properties	Metric	English	Comments
CTE, linear	9.45 µm/m-°C @Temperature 20.0 - 205 °C	5.25 µin/in-°F @Temperature 68.0 - 401 °F
	9.80 µm/m-°C @Temperature 20.0 - 425 °C	5.44 µin/in-°F @Temperature 68.0 - 797 °F
	9.98 µm/m-°C @Temperature 20.0 - 650 °C	5.54 µin/in-°F @Temperature 68.0 - 1200 °F
Specific Heat Capacity	0.516 J/g-°C	0.123 BTU/lb-°F
Thermal Conductivity	6.90 W/m-K	47.9 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	550 °C	1020 °F
Beta Transus	1015 °C	1859 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	5.6 %	5.6 %
Hydrogen, H	<= 0.0060 %	<= 0.0060 %
Molybdenum, Mo	0.25 %	0.25 %
Niobium, Nb (Columbium, Cb)	1.0 %	1.0 %
Nitrogen, N	<= 0.030 %	<= 0.030 %
Oxygen, O	0.090 - 0.15 %	0.090 - 0.15 %
Silicon, Si	0.30 %	0.30 %
Tin, Sn	>= 3.5 %	>= 3.5 %
Titanium, Ti	86 %	86 %
Zirconium, Zr	3.0 %	3.0 %

References for this datasheet.

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