Steel 13HFA (13ХФ)
Designation
Description
13HFA steel is used: for the manufacture of billets and pipes seamless hot-deformed oil and gas increased corrosion resistance and cold-resistance, designed for use in systems transporting gas, systems, oil and gas pipelines, technological pipelines, transporting oil and oil products, as well as in the systems of reservoir pressure maintenance in the Northern climatic zones at ambient temperatures from -60°C to +40°C, temperature of the transported media from +5°C to +40°C and operating pressure up to 7.4 MPa; seamless hot-deformed pipes with improved corrosion and cold-resistance (article 13HFA) with an outer diameter from 60 to 426 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); for the manufacture of electric-welded longitudinal pipes ekspandirovannogo increased corrosion resistance and cold-resistance, used for pipelines, process and field pipelines for operating pressure up to 7.4 MPa to transport crude oil and petroleum products, pipelines of formation pressure maintenance in any climatic zones.
Note
Structural alloy steel of high corrosion resistance and cold-resistance. Pipe oil and gas differ from conventional pipes according to GOST 8731, GOST 8732, high cold resistance, high resistance to General and pitting corrosion, resistance to sulfide corrosion cracking and hydrogen cracking.
Standards
Chemical composition
Fe is the basis.
According to TU 1383-010-48124013-03 the chemical composition is given for steel grade 13HFA. To ensure the fine-grainedness and the binding of nitrogen to nitrides and carbonitrides, the introduction of titanium and niobium is allowed not more than 0.030% and 0.040%, respectively. For globularization of nonmetallic inclusions, steel is deoxidized by silicocalcium or cerium. The total content of Nb + V + Ni ≤ 0.15%.
According to TU 1317-006.1-593377520-2003 the chemical composition is given for steel grade 13HFA. The mass fraction of hydrogen in steel in the pipe metal should not exceed 1.0 ppm (2.0 ppm in the ladle sample). The introduction of niobium and titanium is possible from the calculation of the mass fraction to 0.030% and 0.010%, respectively. In the deoxidized steel for the globularization of sulfide inclusions, calcium (silicocalcium) or cerium is introduced from the calculation of a mass fraction of 0.050%.
According to TU 1381-116-00186654-2013 the chemical composition is given for steel grade 13HFA. The mass fraction of calcium in the steel should not be more than 0.0050% (50ppm). For globularization of inclusions, steel is treated with calcium-containing materials. The alloying of REM steel is allowed. The ratio of Ca / S is not less than 1, deviation from the regulated ratio of Ca / S is allowed provided that compliance with the requirements of the Specification for corrosivity is met. Allowed the addition of titanium from the calculation of the mass fraction in steel no more than 0.030%. Steel should be subjected to vacuum degassing: the mass fraction of hydrogen in the liquid steel after degassing should be no more than 2.5ppm. The mass fraction of hydrogen is taken from the document on the quality of rolled sheets. With a hydrogen content of more than 2.5ppm, slabs should be subjected to anti-flock treatment (PFD) in heated or unheated rings. The mass fraction of Nb + V is not more than 0.15%. Permissible deviations in chemical composition: carbon + 0.010%, manganese + 0.020%, silicon ± 0.050%, sulfur + 0.0010%, phosphorus + 0.0030%, aluminum + 0.010%, copper +0.050 % by nickel +0,050, by chromium ± 0,050%, by vanadium + 0,020%, by nitrogen + 0,0010%. The carbon equivalent value should not exceed 0.43, and the resistance parameter for cracking P cm should not exceed 0.24.
According to TU 1319-369-00186619-2012 the chemical composition is given for steel grade 13HFA on the ladle sample. The steel must be subjected to modifying treatment with calcium alloys and / or rare earth elements (cerium, etc.). In the case of using a modifying element only calcium, the ratio of the mass fraction of calcium to the mass fraction of sulfur in the steel should be at least 1.0. The total mass fraction of calcium is not more than 0.0060%. The hydrogen content in the liquid steel should not be more than 2.5 ppm. It is permissible to introduce titanium, niobium and other carbonitride-forming elements into the steel. The total mass fraction of titanium, niobium and vanadium should not be more than 0.15%. The carbon equivalent value should not be more than 0.40% for pipes with a wall thickness of less than 14 mm, and not more than 0.43% for pipes with a wall thickness of 14 mm or more.
According to TU 1383-010-48124013-03 the chemical composition is given for steel grade 13HFA. To ensure the fine-grainedness and the binding of nitrogen to nitrides and carbonitrides, the introduction of titanium and niobium is allowed not more than 0.030% and 0.040%, respectively. For globularization of nonmetallic inclusions, steel is deoxidized by silicocalcium or cerium. The total content of Nb + V + Ni ≤ 0.15%.
According to TU 1317-006.1-593377520-2003 the chemical composition is given for steel grade 13HFA. The mass fraction of hydrogen in steel in the pipe metal should not exceed 1.0 ppm (2.0 ppm in the ladle sample). The introduction of niobium and titanium is possible from the calculation of the mass fraction to 0.030% and 0.010%, respectively. In the deoxidized steel for the globularization of sulfide inclusions, calcium (silicocalcium) or cerium is introduced from the calculation of a mass fraction of 0.050%.
According to TU 1381-116-00186654-2013 the chemical composition is given for steel grade 13HFA. The mass fraction of calcium in the steel should not be more than 0.0050% (50ppm). For globularization of inclusions, steel is treated with calcium-containing materials. The alloying of REM steel is allowed. The ratio of Ca / S is not less than 1, deviation from the regulated ratio of Ca / S is allowed provided that compliance with the requirements of the Specification for corrosivity is met. Allowed the addition of titanium from the calculation of the mass fraction in steel no more than 0.030%. Steel should be subjected to vacuum degassing: the mass fraction of hydrogen in the liquid steel after degassing should be no more than 2.5ppm. The mass fraction of hydrogen is taken from the document on the quality of rolled sheets. With a hydrogen content of more than 2.5ppm, slabs should be subjected to anti-flock treatment (PFD) in heated or unheated rings. The mass fraction of Nb + V is not more than 0.15%. Permissible deviations in chemical composition: carbon + 0.010%, manganese + 0.020%, silicon ± 0.050%, sulfur + 0.0010%, phosphorus + 0.0030%, aluminum + 0.010%, copper +0.050 % by nickel +0,050, by chromium ± 0,050%, by vanadium + 0,020%, by nitrogen + 0,0010%. The carbon equivalent value should not exceed 0.43, and the resistance parameter for cracking P cm should not exceed 0.24.
According to TU 1319-369-00186619-2012 the chemical composition is given for steel grade 13HFA on the ladle sample. The steel must be subjected to modifying treatment with calcium alloys and / or rare earth elements (cerium, etc.). In the case of using a modifying element only calcium, the ratio of the mass fraction of calcium to the mass fraction of sulfur in the steel should be at least 1.0. The total mass fraction of calcium is not more than 0.0060%. The hydrogen content in the liquid steel should not be more than 2.5 ppm. It is permissible to introduce titanium, niobium and other carbonitride-forming elements into the steel. The total mass fraction of titanium, niobium and vanadium should not be more than 0.15%. The carbon equivalent value should not be more than 0.40% for pipes with a wall thickness of less than 14 mm, and not more than 0.43% for pipes with a wall thickness of 14 mm or more.