Alloy ВТ20Л
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ВТ20Л |
| Designation GOST Latin |
BT20L |
| Transliteration |
VT20L |
| The chemical elements |
ВTe20 |
Description
Alloy ВТ20Л used: for the manufacture of castings of high-loaded details of responsible use fill in a chemically neutral form: of cast housings of aircraft engines, turbines, impellers etc.
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 |
V |
Ti |
Mo |
W |
O |
Zr |
H |
| OST 1 90030-77 |
≤0.15 |
≤0.15 |
≤0.3 |
≤0.05 |
5.5-6.8 |
0.8-2.5 |
The rest |
0.5-2 |
≤0.2 |
≤0.16 |
1.5-2.5 |
≤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 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 |
| ≥785 |
883-1128 |
≥5 |
≥12 |
≥274 |
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 |
