Steel 09СФА (09СФ)
Designation
Description
09СФА steel is used: for the manufacture of seamless hot-deformed pipes with improved corrosion and cold-resistance (article 09СФА), with an outer diameter from 89 to 325 mm, strength class not less than K52, infield pipelines, transporting products of oil wells (pipelines and pressure pipelines at pressures up to 4.6 MPa) and in the systems of reservoir pressure maintenance in terms of oil production enterprises.
Note
Structural alloy steel of high corrosion resistance and cold-resistance.
Standards
Chemical composition
Fe is the basis.
According to TU 1317-006.1-593377520-2003 the chemical composition is given for steel grade 09СФА. The mass fraction of hydrogen in the steel in the metal of the pipe should not exceed 1.0 ppm (2.0 ppm in the ladle sample, niobium and titanium can be added from the calculation of the mass fraction to 0.030% and 0.010%, respectively.) In the deoxidized steel for the globularization of sulfide inclusions enter calcium (silicocalcium) or cerium from the calculation of the mass fraction of 0.050%.
According to TU 14-162-14-96 the chemical composition is given for steel grade 09SFA. In the steel, deviations in the carbon content (+0,020%), aluminum (+0,010%), manganese (+0,10%), sulfur (+0,005%), phosphorus (+0,005%) are allowed. 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.
According to TU 1317-006.1-593377520-2003 the chemical composition is given for steel grade 09СФА. The mass fraction of hydrogen in the steel in the metal of the pipe should not exceed 1.0 ppm (2.0 ppm in the ladle sample, niobium and titanium can be added from the calculation of the mass fraction to 0.030% and 0.010%, respectively.) In the deoxidized steel for the globularization of sulfide inclusions enter calcium (silicocalcium) or cerium from the calculation of the mass fraction of 0.050%.
According to TU 14-162-14-96 the chemical composition is given for steel grade 09SFA. In the steel, deviations in the carbon content (+0,020%), aluminum (+0,010%), manganese (+0,10%), sulfur (+0,005%), phosphorus (+0,005%) are allowed. 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.