Alloy ВТ20Л

Designation

Name The value
Designation GOST Cyrillic ВТ20Л
Designation GOST Latin BT20L
Transliteration VT20L
By 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, and their alloys В51 OST 1 90030-77
Castings, 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 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 properties

sT|s0,2, MPa σU, MPa d y, % KCU, kJ/m2
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%
σU Limit short-term strength
d Elongation after rupture
y The relative narrowing
KCU Toughness