Alloy ВТ5Л
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ВТ5Л |
| Designation GOST Latin |
BT5L |
| Transliteration |
VT5L |
| The chemical elements |
ВTe5 |
Description
Alloy ВТ5Л used: for the manufacture of casting parts for various purposes fill in a chemically neutral form: of details management systems, internal set of the fuselage of welded parts and components, long-running (up to 10,000 hours) at temperatures up to 400 °C.
Note
Alloy with high corrosion resistance.
Alloy ВТ5Л doped only with aluminum:
a) aluminium is widely distributed in nature, available and relatively cheap;
b) the density of aluminium is much less than the density of titanium and, therefore, the addition of aluminum increases the specific strength of the alloy;
C) with increase of aluminum content increases the high temperature strength and creep resistance of the titanium alloy;
g) aluminium increases the modules of elasticity;
d) with the increase of aluminum content in the alloy decreases the tendency to hydrogen embrittlement.
Alloy VT5 differs from the technical titanium of high strength and heat resistance. However, it is preferred to use not deformed condition, and in the form of shaped castings (in this case, it is assigned a brand ВТ5Л).
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
OST 1 90030-77 |
| Castings from non-ferrous metals and alloys |
В84 |
OST 1 90060-92 |
Chemical composition
| Standard |
C |
Si |
Fe |
N |
Al |
Ti |
W |
O |
Zr |
H |
| OST 1 90030-77 |
≤0.2 |
≤0.2 |
≤0.35 |
≤0.05 |
4.1-6.2 |
The rest |
≤0.2 |
≤0.21 |
≤0.8 |
≤0.01 |
Ti is the basis.
According to OST 1 90030-77 the amount of other (not indicated) impurities should be no more than 0.30%. The content of molybdenum and vanadium in the alloy is not more than 0.50% of each. When using rods as electrodes with a chemical composition according to OST 1 90013-78, an increase in vanadium impurities up to 1.20% and molybdenum is allowed up to 0.80%. The total content in the alloy of chromium and manganese is allowed not more than 0.15%. The total content of copper and nickel in the alloy is allowed in an amount not exceeding 0.10%, including nickel not more than 0.080%.
Mechanical characteristics
| sT|s0,2, MPa |
σB, MPa |
d |
y, % |
kJ/m2, кДж/м2 |
| Casting as supplied after annealing |
| ≥618 |
687-981 |
≥6 |
≥14 |
≥294 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
