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TIMET TIMETAL® 550 (Ti-4Al-4Mo-2Sn) Titanium Alloy Solution Treated

Category Metal , Nonferrous Metal , Titanium Alloy , Alpha/Beta Titanium Alloy
Manufacturer TIMET
Trade Name TIMETAL®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF TIMET TIMETAL® 550 (Ti-4Al-4Mo-2Sn) Titanium Alloy Solution Treated.pdf
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Material Notes:
High-Strength Forging AlloyIndustry Specifications: Germany Aerospace: 3.7184. France: T-A4DE. UK Aerospace Specifications BS TA. 45, 46, 47, 48,49, 50, 51, 57.Features: TIMETAL 550, like TIMETAL 6-4, is readily forgeable and is generally used in a heat treated condition. It has superior room and elevated temperature tensile strength and fatigue strength compared to TIMETAL 6-4, and is creep resistant up to 400°C. It has applications in the aerospace industry, both as aeroengine and airframe components. Typical applications include compressor discs and flap tracks. The alloy has also found applications in high performance automotive engines. The alloy may be welded using controlled electron beam or laser welding techniques. Slow welding speeds and low cooling rates are necessary to achieve adequate weld properties. In sheet form, the alloy has good superplastic properties and excellent balance of strength and toughness.Typical heat treatment for this alloy: Solution heat treatment: 900°C for 1 hr per 25 mm section, air cool. Aging treatment: 500°C for 24 hrs, air cool.Data provided by TIMET.
Physical Properties Metric English Comments
Density 4.60 g/cc
0.166 lb/in³
Typical
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 1080 MPa
157000 psi
Typical
Tensile Strength, Yield 930 MPa

@Strain 0.200 %
135000 psi

@Strain 0.200 %
Typical
Elongation at Break 12 %
12 %
Typical
Reduction of Area 20 %
20 %
Modulus of Elasticity 110 - 120 GPa
16000 - 17400 ksi
Typical
Fatigue Strength 540 - 650 MPa
78300 - 94300 psi
Limit; test specifics not reported
Fracture Toughness 57.0 - 70.0 MPa-m½
51.9 - 63.7 ksi-in½
K(IC); Typical Forging (heat treatment unspecified); Tangential
65.0 - 69.0 MPa-m½
59.2 - 62.8 ksi-in½
K(IC); Typical Bar (heat treatment unspecified); Longitudinal
Thermal Properties Metric English Comments
CTE, linear 8.80 µm/m-°C

@Temperature 20.0 - 100 °C
4.89 µin/in-°F

@Temperature 68.0 - 212 °F
9.70 µm/m-°C

@Temperature 20.0 - 500 °C
5.39 µin/in-°F

@Temperature 68.0 - 932 °F
Specific Heat Capacity 0.634 J/g-°C
0.152 BTU/lb-°F
Thermal Conductivity 7.52 W/m-K
52.2 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 400 °C
752 °F
Good tensile and creep to 400°C
Beta Transus 975 °C
1790 °F
Component Elements Properties Metric English Comments
Aluminum, Al 3.0 - 5.0 %
3.0 - 5.0 %
Hydrogen, H <= 0.0125 %
<= 0.0125 %
Iron, Fe <= 0.20 %
<= 0.20 %
Molybdenum, Mo 3.0 - 5.0 %
3.0 - 5.0 %
O + 2N <= 0.27 %
<= 0.27 %
Silicon, Si 0.30 - 0.70 %
0.30 - 0.70 %
Tin, Sn 1.5 - 2.5 %
1.5 - 2.5 %
Titanium, Ti 85.9 - 92.2 %
85.9 - 92.2 %
Calculated as remainder
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