Steel 13ГС (13ГС -)

Designation

Name The value
Designation GOST Cyrillic 13ГС
Designation GOST Latin 13GC
Transliteration 13GS
By chemical elements 13MnС
Name The value
Designation GOST Cyrillic 13ГС-У
Designation GOST Latin 13GC-U
Transliteration 13GS-U
By chemical elements 13MnС-C

Description

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.

Standards

Name Code Standards
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

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N Al Ti
TU 14-158-146-2004 0.11-0.15 ≤0.015 ≤0.02 1.15-1.45 - 0.4-0.6 - Rest - ≤0.01 - -
TU 14-3-1573-96 0.11-0.15 ≤0.015 ≤0.025 1.15-1.45 ≤0.3 0.4-0.6 ≤0.3 Rest ≤0.3 ≤0.012 0.02-0.05 0.015-0.035
Fe is the basis.
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%.

Mechanical properties

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

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
KCU Toughness