Steel 20Х2МФА

Designation

Name The value
Designation GOST Cyrillic 20Х2МФА
Designation GOST Latin 20X2MFA
Transliteration 20H2MFA
By chemical elements 20Cr2MoV

Description

20Х2МФА steel is used: for the manufacture of precision tubes; cylinders downhole sucker rod pumps; the plungers of downhole pumps.

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 TU 14-1-4053-86
Steel pipes and fittings to them В62 TU 14-3-1396-86, TU 14-3-1443-86, TU 14-3-1444-86

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, %
Tubular billet on the other 14-1-4053-86. Quenching in oil from 870-900 °C + Vacation at 650-700 °C (1.5 h exposure)
≥637 ≥735 ≥17

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

Technological properties

Name The value
Macrostructure and pollution In the macrostructure of billets on the other 14-1-4053-86 should not be podnasadochnogo looseness, bubbles and cracks, foreign non-metallic micro-inclusions, remnants of shrinkage, peel, delamination and placenow. The defects allowed in points shall not exceed: Central porosity - 2.0 points; - point heterogeneity - 2.0 points; - exudation square - 2.0 points. Contamination of billets non-metallic inclusions shall not exceed the maximum score: - sulphides (C) - 3.0 points; - on oxides and silicates (ON, OS, OX, SI) - 4.0 points.
Particularities of production of goods Tubular billet on the other 14-1-4053-86 supplied in heat-treated (annealed) condition.