Steel 13ГС (13ГС -)
|Designation GOST Cyrillic||13ГС|
|Designation GOST Latin||13GC|
|By chemical elements||13MnС|
|Designation GOST Cyrillic||13ГС-У|
|Designation GOST Latin||13GC-U|
|By chemical elements||13MnС-C|
13ГС steel is used: for the production of continuous cast slabs; ekspandirovannogo electrically welded pipes with a diameter 711−1220 mm for main gas and oil pipelines; electric-welded longitudinal pipes of strength group K52 for construction of gas pipelines, oil pipelines and oil product pipelines.
|Sheets and strips||В33||TU 14-1-3636-96, TU 14-1-3636-83|
|Blanks. Of the workpiece. Slabs||В31||TU 14-1-5018-91|
|Steel pipes and fittings to them||В62||TU 14-3-1698-2000, TU 14-158-153-05, TU 14-158-146-2004, TU 14-3-1573-96, TU У 27.2-00191135-016-2007|
According to TU 14-3-1573-96 the chemical composition is given for steel grade 13GS. Steel grade 13GS-U has a difference in chemical composition: S ≤ 0.008%, P ≤ 0.025%. The carbon equivalent for both brands is ≤ 0.43%. It is allowed to introduce into the steel a technological additive silicocalcium or rare-earth materials (REM) at the rate of 0.5-2.0 kg per 1 ton of steel.
According to TU 14-158-146-2004 the chemical composition is given for steel 13GS for the ladle sample for the 1st level of the quality of the pipes. For pipes of the second level of quality in the ladle sample, the mass fraction of sulfur is ≤ 0.010%, phosphorus ≤ 0.015%, carbon = 0.11-0.14%. For pipes of steel 13GS-U of the 1st quality level, the mass fraction of sulfur is ≤ 0.008%, phosphorus ≤ 0.020%, carbon = 0.11-0.15%. For pipes of steel 13GS-U of the 2nd quality level, the mass fraction of sulfur ≤ 0.008%, phosphorus ≤ 0.015%, carbon = 0.11-0.14%.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||KCU, kJ/m2|
|Longitudinal electric-welded pipes of oil and gas as delivered at TU 14-3-1573-96 (steel 13ГС and 13ГС; samples of a cross; in the column cross section - outer diameter. wall thickness; in the graph the value is KCU KCU-40 °C)|
|530, 630 (15-24)||≥360||≥510||≥20||≥392|
|530, 630 (7-15)||≥360||≥510||≥20||≥294|
|720, 820 (≤10)||≥360||≥510||≥20||≥294|
|720, 820, 1020 (10-15)||≥360||≥510||≥20||≥392|
|720, 820, 1020 (15-25)||≥360||≥510||≥20||≥490|
Description mechanical marks
|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|