Steel 08ХМЧА (08ХМЧ)

Designation

Name The value
Designation GOST Cyrillic 08ХМЧА
Designation GOST Latin 08XMChA
Transliteration 08HMChA
By chemical elements 08CrMoZr
Name The value
Designation GOST Cyrillic 08ХМЧ
Designation GOST Latin 08XMCh
Transliteration 08HMCh
By chemical elements 08CrMoZr

Description

08ХМЧА steel is used: for the production of seamless hot-deformed oil and gas pipes with improved corrosion and cold-resistance, designed for use in systems of oil and gas pipelines, technological pipelines, transporting oil and oil products, as well as in the systems of reservoir pressure maintenance in terms of oil production enterprises.

Standards

Name Code Standards
Steel pipes and fittings to them В62 TU 14-162-14-96, TU 14-162-20-97, TU 14-161-148-94

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al V Ti Mo Ca Ce
TU 14-162-14-96 0.06-0.12 ≤0.015 ≤0.015 0.45-0.6 0.6-0.7 0.2-0.4 ≤0.25 Rest ≤0.25 0.03-0.05 - - 0.1-0.15 - -
TU 14-162-20-97 0.06-0.12 ≤0.02 ≤0.02 0.4-0.6 0.4-0.7 0.2-0.4 ≤0.25 Rest ≤0.25 0.03-0.05 ≤0.01 0.03-0.05 0.1-0.15 ≤0.05 ≤0.05
TU 14-161-148-94 0.06-0.12 ≤0.012 ≤0.015 0.5-0.8 0.5-0.9 0.2-0.45 ≤0.3 Rest ≤0.3 ≤0.1 - - 0.15-0.2 ≤0.05 ≤0.05
Fe is the basis.
According to TU 14-161-148-94, cerium, calcium and aluminum (each) are introduced into the steel for modification according to the calculation according to the data in the table.
According to TU 14-162-14-96 chemical composition is given for steel grade 08HMCHA. Variations in carbon content (+0.010%), aluminum (± 0.010%), manganese (+ 0.015%), sulfur (+ 0.005%), phosphorus (+ 0.002%), chromium (± 0.10%) are allowed in the steel. molybdenum (+0,050%). Modification of the steel by ferrosilicon or silicocalcium is possible with the calculation of the content of cerium and calcium in the steel of 0.050% each, the content of which is not controlled, and the calculated values ​​are entered in the certificate. In order to increase the strength properties, titanium can be introduced into the steel in an amount up to 0.010%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % HRB
Pipe the seamless hot-deformed heat-treated in the delivery condition on the other 14-162-14-96
372-509 502-627 ≥25 ≤92

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
HRB Rockwell hardness (indenter steel, spherical)