* Titanium Grade 21 *
Chemical composition (weight %) (Maximum values unless range is shown)
O
N
C
H
Fe
A1
Nb
Si
Mo
Others
Residuals
0.15
0.05
0.05
0.015
0.4
2.3
2.2-3.2
3.5
14.0-16.0
0.4


Beta-21S is a mestastable beta alloy that offers high specific strength and good formability, and has been
designed for improved oxidation resistance, elevated temperature strength, creep resistance and thermal stability.
It is most useful for application above 300. Because it can be economically rolled to foil and is compatible with
most fibres, it is also well suited for metal matrix composites.
 
Mechanical properties at room temperature
 
Minimum values
Typical values
Yield Strength
965 MPa
1100 MPa
Ultimate Strength
1030 MPa
1150 MPa
Elongation in 50 mm, A5
6%
10%
Reduction in Area
%
%
Hardnes
360-420 HV
Modulus of elasticity
72-85 GPa
Charpy V-Notch Impact
103-110 J