Steel 08Х2Г2ФА

Designation

Name The value
Designation GOST Cyrillic 08Х2Г2ФА
Designation GOST Latin 08X2G2FA
Transliteration 08H2G2FA
By chemical elements 08Cr2Mn2V

Description

08Х2Г2ФА steel is used: for the manufacture of rolled and forged billets and pipes; solid cylinders downhole sucker rod pumps; hot pipes details of special items.

Note

High quality alloy structural steel.

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 TU 14-1-5016-91
Steel pipes and fittings to them В62 TU 14-159-227-93

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V
TU 14-1-5016-91 0.06-0.14 ≤0.025 ≤0.025 1.8-2.2 1.8-2.2 0.17-0.37 ≤0.5 Rest ≤0.3 0.1-0.2
Fe is the basis.
According to TU 14-1-5016-91 the chemical composition is given for steel grade 08H2G2FA. When melting steel in the main open-hearth furnaces and electric furnaces with acid lining, the mass fraction of phosphorus is allowed up to 0.030%. The final deoxidation is carried out by aluminum, calcium-containing deoxidizers and REM from the calculation of the production of 0.01-0.050% in finished aluminum, calcium and REM not less than 0.0010% of each. The content of aluminum, calcium and REM in steel is not controlled and is provided technologically during smelting. Deviations in chemical composition are allowed in the finished product: carbon +0.010%, silicon + 0.230 / -0.020%, manganese ± 0.25%, chromium ± 0.25%, vanadium ± 0.010%.

Mechanical properties

Section, mm sT|s0,2, MPa d5, % y, % KCU, kJ/m2
The tubular billet, rolled and forged on the other 14-1-5016-91. The longitudinal samples. Quenching in water from 900-950 °C (extract 60-70 minutes) + Vacation at 600-650 °C (aging for 3.0-3.5 hours), cooling in water
25-40 ≥500 ≥23 ≥45 ≥588

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
d5 Elongation after rupture
y The relative narrowing
KCU Toughness

Technological properties

Name The value
Macrostructure and pollution Macrostructure of steel when testing for treated Templeton and breaks should not have shrinkage, podnasadochnogo looseness, bubbles, cracks, placenow, delaminations, voids, foreign inclusions, visible to the naked eye. Defects in the macrostructure should not exceed the following standards: - point heterogeneity - 2 points; - the Central porosity - 2 score; - exudation square - 2 points; - prosadochnye liquation - 1 point Total and marginal spotted segregation, subcortical bubbles, intergranular cracks are not allowed. Pollution steel non-metallic inclusions on the average score GOST 1778 valley not to exceed the following 2.0 points for each type of inclusions (OS, OT, SP, CH, CX, NS, and NT).