Biomedical Engineering Reference
In-Depth Information
Sn). It has been shown that the addition of Zr stabilizes the β phase
in Ti-Zr-Nb system.
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Physical properties of titanium
Properties
Value
Atomic number
22
Atomic mass
47.90
Crystallographic structure
α (hexagonal)
a
[Å]
c
[Å]
4.6832±0.0004
2.9504±0.0004
β (cubic)
a
[Å]
3.28±0.003
Density [g/cm
3
] 4.54
Temperature coeficient of heat expansion α at 20
o
C [K
-1
] 8.4
.
10
-6
Thermal conductivity [W/(m
.
K)]
19.2
Melting temperature [
o
C]
1668
Evaporation temperature [
o
C]
3260
Temperature of allotropic transformation [
o
C]
882.5
Electric resistivity
High-purity titanium [μΩ
.
cm]
42
Commercial-purity titanium [μΩ
.
cm]
55
Young's modulus [GPa]
105
Yield strength [MPa]
692
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Titanium and its alloy grades
Grades
ISO
Cp-Titanium Grade 1
ISO 5832-2
Cp-Titanium Grade 2
ISO 5832-2
Cp-Titanium Grade 4
ISO 5832-2
Titanium alloy Ti Al6V4 (ELI)
ISO 5832-3
Titanium alloy Ti Al6Nb7
ISO 5832-11
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Chemical compositions of different titanium grades
Grade C Fe O H N Al V Ti
1 max. 0.08 0.20 0.18 0.01 0.03 — — bal.
2 max. 0.08 0.30 0.25 0.01 0.03 — — bal.
4 max. 0.08 0.50 0.40 0.01 0.05 — — bal.
0.08 0.25 0.13 0.01 0.05 5.50
6.50
3.50
4.50 bal.
ELI max.
ELI - extra low interstitials
