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TIMET TIMETAL® 21S Titanium Alloy (Ti-15Mo-3Nb-3Al-0.2Si, ASTM Grade 21); Annealed Strip/Sheet

Category Metal , Nonferrous Metal , Titanium Alloy , 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® 21S Titanium Alloy (Ti-15Mo-3Nb-3Al-0.2Si, ASTM Grade 21); Annealed Strip/Sheet.pdf
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Material Notes:
High-Strength, Oxidation Resistant Strip AlloyFeatures: Offers the good cold formability and weldability of a beta strip alloy, but with greatly improved oxidation resistance and creep strength. Aerospace applications include engine exhaust plug and nozzle assemblies. The alloy's resistance to aircraft hydraulic fluids, such as Skydrol, is excellent at all temperatures. It is well suited for metal matrix composites because it can be economically rolled to foil, is compatible with most fibers, and is sufficiently stable up to 816°C.Typical heat treatment for this alloy: Solution treatment: 816-843°C for 3-30 min, air cool. Age treatment: 510-679°C for 8-16 hrs. Data provided by TIMET.
Physical Properties Metric English Comments
Density 4.94 g/cc
0.178 lb/in³
Typical
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 915 MPa
133000 psi
Typical
Tensile Strength, Yield 880 MPa

@Strain 0.200 %
128000 psi

@Strain 0.200 %
Typical
Elongation at Break 15 %
15 %
Typical
Modulus of Elasticity 83.0 GPa
12000 ksi
Typical
Bend Radius, Minimum 2.5 t
2.5 t
Typical; on 0.078 in (2 mm) sheet
Thermal Properties Metric English Comments
CTE, linear 7.07 µm/m-°C

@Temperature 38.0 °C
3.93 µin/in-°F

@Temperature 100 °F
8.90 µm/m-°C

@Temperature >=316 °C
4.94 µin/in-°F

@Temperature >=601 °F
9.50 µm/m-°C

@Temperature 538 °C
5.28 µin/in-°F

@Temperature 1000 °F
Specific Heat Capacity 0.490 J/g-°C
0.117 BTU/lb-°F
Thermal Conductivity 7.60 W/m-K
52.7 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 593 °C
1100 °F
Structural Applications
816 °C
1500 °F
Use in metal matrix composites
Beta Transus 800 °C
1470 °F
Component Elements Properties Metric English Comments
Aluminum, Al 2.5 - 3.5 %
2.5 - 3.5 %
Carbon, C <= 0.050 %
<= 0.050 %
Hydrogen, H <= 0.015 %
<= 0.015 %
Iron, Fe <= 0.40 %
<= 0.40 %
Molybdenum, Mo 14 - 16 %
14 - 16 %
Niobium, Nb (Columbium, Cb) 2.4 - 3.2 %
2.4 - 3.2 %
Nitrogen, N <= 0.050 %
<= 0.050 %
Oxygen, O 0.11 - 0.17 %
0.11 - 0.17 %
Silicon, Si 0.15 - 0.25 %
0.15 - 0.25 %
Titanium, Ti 76 - 80.8 %
76 - 80.8 %
Calculated as remainder
Electrical Properties Metric English Comments
Electrical Resistivity 0.000135 ohm-cm
0.000135 ohm-cm
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