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TITANIUM AND TITANIUM ALLOYS
After an extensive research and development programme
for the manufacture of titanium bars, together with an high technological
level in plant and equipment, Valbruna has achieved a carefully controlled
manufacturing process to ensure the highest quality product.
Titanium, because of its physical, chemical and mechanical
properties,is among the most interesting materials for constructing the
products of the future.
The most versatile Titanium grades can be found in Valbruna's production
range:
- Commercially pure Titanium Ti Gr.2 and Ti Gr.4
- Titanium Alloys Ti Gr.5 and Ti Gr.5 ELI
| Titanium
and titanium alloys
(click on Product for details) |
| N |
Product |
EN |
ASTM |
UNS |
DIN |
BS |
UNI |
| 1 |
Ti Gr1 |
- |
B348 GR1 F67 GR1 |
R50250 |
- |
- |
- |
| 2 |
Ti Gr2 |
- |
B348 GR2 F67 GR2 |
R50400 |
- |
- |
- |
| 3 |
Ti Gr4 |
- |
B348 GR4 F67 GR4 |
R50700 |
- |
- |
- |
| 4 |
Ti Gr5 |
- |
B348 GR5 F1472 6Al4V B381 FS |
R56400 |
- |
- |
- |
| 5 |
Ti Gr5ELI |
- |
B348 GR23 F136 6Al4Veli |
R56401 |
- |
- |
- |
Ti Gr.2
Combines good tensile strenght and cold forming properties
Ti Gr.4
Is the commercially pure Titanium possessingthe highest
tensile strenght properties
Ti Gr.5
Is the most versatile Titanium alloy due to its excellent
combination of characteristics.
It behaves well in forging and has excellent ductility and toughness in
the annealed condition.
Because of its low sensibility to notching effects and its excellent resistnce
to cavitation,
Ti Gr.5 is suitable for any mechanical application
Ti Gr.5 ELI
Is the Titanium ally used in biomedicak implants,
because of its extra low level of interstitial elements
obtained through a double remelting in the VAR furnace
|
Technical properties
|
| |
T.S. min
|
Y.S [0,2%]
min
|
E in 4D min
|
RA min
|
|
N/mm2
|
N/mm2
|
%
|
%
|
|
Ti Gr.2
|
345
|
275
|
20
|
30
|
|
Ti Gr.4
|
550
|
438
|
15
|
25
|
|
Ti Gr.5
|
895
|
828
|
10
|
25
|
|
Ti Gr.5 ELI
|
825
|
760
|
8
|
15
|
|
Physical properties
|
| |
Atomic
weight
|
specific
gravity
|
Density
|
Melting
Temp
|
Coeff. of
expansion
|
Specific
heat
|
Thermal
conductivity
|
Electrical
Resistivity
|
Magnetic
permeability
|
Coeff of
elasticity
|
Poisson
Ratio
|
| |
|
Kg/dm3
|
°C
|
μm/m°C
|
J/Kg°C
|
W/m°C
|
μΩm
|
a 1.6 kAm
|
Gpa
|
|
|
Ti Gr.2
|
22
|
47,9
|
4,5
|
1660-1670
|
8,3
|
544
|
16,4
|
0,5
|
1,00005
|
103
|
0,33
|
|
Ti Gr.4
|
22
|
47,9
|
4,5
|
1660-1670
|
8,3
|
544
|
16,4
|
0,5
|
1,00005
|
103
|
0,33
|
|
Ti Gr.5
|
22
|
47,9
|
4,43
|
1604-1660
|
9
|
586
|
6,6
|
1,71
|
1,00005
|
110
|
0,33
|
|
Ti Gr.5 ELI
|
22
|
47,9
|
4,43
|
1604-1660
|
9
|
586
|
6,6
|
1,71
|
1,00005
|
110
|
0,33
|
High specific strenght
Titanium alloys have high mechanical strenght with
approximately half the density of steel. Moreover, the ratio strenght/density,
in comparision with other metals, remains higher as the temperature varies.
Comparison of metal: ratio of strenght/density
ot different temperature
Corrosion resistance
Titanium has an excellent corrosion resistance due
to a stable passivated film on its surface as shown in the tables following.
Erosion-corrosion resistance
Titanium has also an excellent erosion-corrosion resistance.
The critical speed is sea water is very high: in fact at speeds below
35 m/s the passivated film cover is not removed
Tests caried ot with seawater and sand at 25°C
at a speed of 7,5 m/s for 150 hours sand with Ø50µm
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