|Designation GOST Cyrillic||10Г2ФБЮ|
|Designation GOST Latin||10G2FBJu|
|By chemical elements||10Mn2VNbAl|
Steel 10G2FBYU used: for the manufacture of electrowelded pryamoshovny pipes of strength group K60 for the construction of gas pipelines, oil pipelines and oil product pipelines; fittings of oil and gas pipelines; fittings of main pipelines in diameter to 1420 mm.
|Sheets and strips||В33||TU 14-1-5339-96, TU 302.02.171-93, TU 05764417-014-94|
|Bars and shapes||В32||TU 14-105-644-2000|
|Steel pipes and fittings to them||В62||TU 14-158-153-05, TU 14-158-146-2004, TU 14-3-1573-96|
According to TU 14-3-1573-96 carbon equivalent of Se ≤ 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. The mass fraction of calcium or REM in the steel is 0.001-0.020% - the norm is optional and is not a sign of acceptance. Steel produced by JSC "Izhorskiye zavody" should contain carbon 0.08-0.11%, manganese 1.60-1.80%.
According to TU 14-158-146-2004 the chemical composition is given for the ladle sample for the 1st level of the quality of the pipes. For pipes of the 2nd level of quality in the ladle sample, the mass fraction of manganese = 1.55-1.75%, phosphorus ≤ 0.015%, nitrogen ≤ 0.006%.
According to TU 14-1-5339-96 chemical analysis is given for steel grade 10G2FBYU. The steel is subjected to out-of-furnace treatment with synthetic slag and / or solid slag-forming mixtures and blowing with argon. Steel is processed by materials containing calcium and / or rare earths in an amount of 0.50-2.00 kg / t. In the steel, the mass fraction of residual chromium, nickel and copper is not more than 0.30% of each. In the finished rolled steel, deviations in chemical composition are allowed provided mechanical properties are provided: carbon +0.010%, manganese ± 0.050%, silicon +0.050%, vanadium and niobium + 0.010% each, sulfur +0.0010%, phosphorus +0.0050%, aluminum ± 0.010%, titanium +0.010%, nitrogen +0.0020%. The carbon equivalent should not exceed 0.45%.
According to TU 14-105-644-2000 chemical composition, the casting composition for steel grade 10G2FBYU is given. In the steel is introduced a technological additive from the calculation of the introduction of calcium 0.25-0.30 kg / tonne without taking into account the burnout. In the finished rolled steel, deviations in chemical composition are permissible: carbon + 0.010%, manganese and silicon ± 0.050% each, titanium ± 0.0050%, niobium + 0.010%, aluminum ± 0.010%, sulfur +0.0010 %, for phosphorus +0.0050%, for copper and nickel +0.050% for each, for vanadium + 0.010%, for nitrogen +0.0020%. On the sheets for the connecting parts of the main pipelines, the carbon equivalent should not be more than 0.43%.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||KCU, kJ/m2|
|Sheet metal in delivery condition on the other 14-105-644-2000. The graph indicates the value of KCU KCU-20°C/KCU-60°C|
|Plates on the other 14-1-5339-96. The heat-treated samples (Normalization or Normalization with the release). In the graph indicated the value of KCU KCV-20°Sleeping samples-type II/KCV-60°Sleeping samples of type I|
|Longitudinal electric-welded pipes of oil and gas as delivered at TU 14-3-1573-96 (samples transverse; column cross section - outer diameter. wall thickness; in the graph the value is KCU KCU-60 °C)|
|530, 630 (≤10)||≥460||≥590||≥20||≥294|
|530, 630 (10-12)||≥460||≥590||≥20||≥392|
|530, 630 (12-24)||≥460||≥590||≥20||≥490|
|720, 820 (≤10)||≥460||≥590||≥20||≥294|
|720, 820 (10-12)||≥460||≥590||≥20||≥392|
|720, 820 (12-30)||≥460||≥590||≥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|
|Particularities of production of goods||Plates on the other 14-1-5339-96 comes in hot-rolled condition after the diffusion of refining hydrogen in a warm (450-600 °C) foot by slow cooling.|