Titanium grade 4 alloy
Characteristics of titanium grade 4
| Description |
Identification |
| Grade of titanium alloy |
Titanium grade 4 |
| Alloy classification |
Commercial titanium |
| Industrial usage of alloy |
Manufacture of semi-fabricates (sheets, strips, bars, foil, forgings, ingots, stamped blanks, pipes, plates) is done with a help of deformation |
Percentage composition according to GOST 19 807- — 91
| O |
Fe |
N |
Ti |
C |
Si |
H |
Residual elements |
| not more than 3 |
not more than 1,5 |
not more than 0,15 |
97.8 — 99.7 |
not more than 0,1 |
not more than 0,15 |
not more than 0,01 |
others 0,3 |
Note: titanium constitutes a basis of alloy; its percentage content is noted in a table.
Mechanical characteristics of titanium grade 4 alloy (temperature of 20°С)
| Range of sizes |
F.e. |
Size |
KCU |
y |
Heat treatment. |
d5 |
sT |
sv |
| - |
- |
mm |
kJ/m2 |
% |
- |
% |
MPa |
MPa |
| Annealed bar according to GOST 26 492−85 |
|
|
250 |
17 |
|
8 |
|
590−930 |
Physical characteristics of titanium grade 4
| 1/Degree |
MPa |
Degree |
J/(kg/degree) |
Ohm-m |
kg/m3 |
V/(m/degree) |
| |
1,12 |
20 |
|
|
4505 |
18,85 |
| 8,2 |
|
100 |
540 |
|
|
|
| a 10 6 |
E 10- 5 |
T |
C |
R 10 9 |
r |
l |
Mechanical characteristics
| Description |
Identification |
| Flow limit at permanent change of form (proportional limit) [MPa] |
sT |
| Brinell hardness [MPa] |
HB |
| Contraction ratio (%) |
y |
| Short resistance to rupture [MPa] |
sv |
| Percent elongation at fracture [ % ] |
d5 |
| Impact hardness [ kJ/m2] |
KCU |
Physical characteristics
| Description |
Identification |
| Temperature at which are obtained actual characteristics: |
20°С |
| Lineal expansion coefficient α x 106 at 100 °C [1/ °С] |
8.2 |
A density g/cm3;
|
4.45 |
| Elasticity module of 1 sort Е [MPa] x 10-5 |
1.12 |
| Specific heat of alloy at 200 °C [J (kg-deg)] |
0.586 |
| Heat conduction coefficient, l [V/(m*deg)] |
8.37 |
| Specific electric resistance Оmh-mm2/m |
1.6 |
Weldability
| Identification |
Description |
| weldable without limits |
welding is done without further heat treating or heating |
| limitedly weldable |
welding is possible at heating to 100−120°С and last heat treating |
| hardly weldable |
in order to obtain a qualitative welded joints, it is necessary to perform the following operations: while welding to heat it up to 200−300°C, to do a heat treating (annealing) after welding |
Application of alloy and its properties
Commercial titanium grade 4 is used in manufacture of chemical reactors, pumps, holding capacities, pipe arrangements, fittings and other products that operate in aggressive environment (such as chemical mechanical engineering etc.). Titanium is popular in hydrometallurgy of non-ferrous metals. Commercial titanium is intended for covering steel articles. Usage of this metal gives a high engineering-and-economical effect. All these advantages are present not only due to increasing of a working life of equipment, but also due to an augmentation of process (f.e. in hydrometallurgy of nickel). Having a biological safety, titanium is an indispensable material in equipment manufacture for food industry and for restorative surgery. Strength of this material increases in condition of deep cold. It keeps a perfect plasticity by doing so. This allows using it in cryogenic technique in the capacity of bearing material.
This metal can be easy taken to grit, to colour anodizing, and to other methods of surface finishing. That is why it is also used in manufacture of different art objects. Titanium boride and titanium alloys possess practical importance among all titanium compounds. They are used in energetic nuclear facilities in the capacity of moderators because of high neutron-capture crossing and its refractory quality. Titanium carbide has high hardness. It is used in a composition of instrumental hard alloys that are utilized in a manufacture of cutting tools in the capacity of abraded material. Haloids, silicides, oxides of titanium are used in high-temperature engineering.
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