TIMET TIMETAL® 21S Titanium + Silicon Carbide Fiber Composite

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TIMET TIMETAL® 21S Titanium + Silicon Carbide Fiber Composite
Categories:	Metal; Metal Matrix Composite; Nonferrous Metal; Titanium Alloy; Beta Titanium Alloy
Material Notes:	4-Ply unidirectional laminate featuring SCS-6 silicon carbide fibers in titanium alloy matrix. Timet® 21S is a High-Strength, Oxidation Resistant Strip Alloy. 21S 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. Data provided by TIMET.
Key Words:	Beta 21S; UNS R58210; MMC
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Physical Properties	Metric	English	Comments

Density	4.24 g/cc	0.153 lb/in³

Mechanical Properties	Metric	English	Comments
Tensile Strength	517 MPa @Temperature 816 °C	75000 psi @Temperature 1500 °F
	1140 MPa @Temperature 538 °C	165000 psi @Temperature 1000 °F
	1720 MPa @Temperature 21.1 °C	250000 psi @Temperature 70.0 °F
Modulus of Elasticity	186 GPa	27000 ksi

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	816 °C	1500 °F
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

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NTIME21SX / 199564

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