Alloy 10Х20Н77ТЮ

Designation

Name The value
Designation GOST Cyrillic 10Х20Н77ТЮ
Designation GOST Latin 10X20H77TJu
Transliteration 10H20N77TYu
By chemical elements 10Cr20Ni77TeAl

Description

Alloy 10Х20Н77ТЮ used: for the manufacture of pipes tsentrobezhnolityh for the manufacture of the coils of the tubular furnace installations production of ammonia, hydrogen, ethylene, carbon disulphide, etc., operating in the temperature range 760−1060 °C and a pressure of 3.92 MPa (40 kgf/cm2); seamless hot — and cold-drawn pipes used in the production of ammonia, hydrogen, methanol, ethylene, carbon disulphide etc.

Note

Alloy corrosion resistant heat resistant.

Standards

Name Code Standards
Steel pipes and fittings to them В62 TU 1333-047-00220302-02, TU 1320-003-18648658-00

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu As Al V Ti Mo Zn Sn Pb W
TU 1320-003-18648658-00 ≤0.12 ≤0.012 ≤0.015 0.0005-0.69 19-22.05 0.0005-0.79 Rest ≤6 ≤0.2 ≤0.01 0.0005-0.15 0.0005-0.1 0.15-0.35 0.0005-0.1 ≤0.01 ≤0.01 ≤0.01 0.0005-0.1
Ni is the basis.

Mechanical properties

sT|s0,2, MPa σU, MPa d5, %
Seamless pipes hot and cold-of an external diameter 25-168 mm. Quenching in water or air from 1100-1150 °C
≥225 ≥490 ≥25
Tsentrobezhnolityh pipe outer diameter 85-320 mm. Quenching in water or air from 1100-1150 °C
≥225 ≥490 ≥25

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
d5 Elongation after rupture