Steel 50Х25Н35С2Б

Designation

Name The value
Designation GOST Cyrillic 50Х25Н35С2Б
Designation GOST Latin 50X25H35C2B
Transliteration 50H25N35S2B
By chemical elements 50Cr25Н35С2Nb

Description

50Х25Н35С2Б steel is 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).

Standards

Name Code Standards
Steel pipes and fittings to them В62 TU 1333-047-00220302-02

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu As V Ti Mo Zn Sn Pb Nb Ce
TU 1333-047-00220302-02 0.4-0.5 ≤0.03 ≤0.03 0.0505-0.51 24-28 1.8995-2.39 34-36 Rest ≤0.2 ≤0.01 0.0005-0.2 0.0005-0.1 ≤0.5 ≤0.01 ≤0.01 ≤0.01 1.3-1.7 0.08-0.12
Fe is the basis.
The content of Ce is not determined, it is guaranteed by the technology of steel making. Ligature Мц50Ж6 (TU 48-4-280-86) is introduced from the calculation of cerium production in steel in the required quantity.

Mechanical properties

sT|s0,2, MPa σU, MPa d
Tsentrobezhnolityh pipe outer diameter 85-320 mm. Quenching in water or air from 1100-1150 °C
≥245 ≥441 ≥8

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