Steel 20Х2МА

Designation

Name The value
Designation GOST Cyrillic 20Х2МА
Designation GOST Latin 20X2MA
Transliteration 20H2MA
By chemical elements 20Cr2Mo

Description

20Х2МА steel is used: for the production of pipes for pipelines in the units for ammonia production with a working pressure of PN=31 MPa (320 kgf/cm2).

Standards

Name Code Standards
Processing of metals by pressure. Forgings В03 TU 108-11-432-79
Blanks. Of the workpiece. Slabs В31 TU 14-134-409-2004
Steel pipes and fittings to them В62 TU 14-3-433-75, TU 14-134-291-91

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Mo
TU 14-134-291-91 0.18-0.24 ≤0.03 ≤0.01 0.3-0.7 2.1-2.5 0.17-0.37 ≤0.3 Rest ≤0.3 0.25-0.35
Fe is the basis.

Mechanical properties

sT|s0,2, MPa σU, MPa d5, % KCU, kJ/m2 HB, MPa
Tubular billet on the other 14-134-409-2004 the pipe THAT 14-3-433-75 in the state of delivery of heat treated (longitudinal samples)
≥412 ≥588 ≥14 ≥588 -
≥392 ≥490 - - 174-248

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
KCU Toughness
HB Brinell hardness number