Steel 03Х11Н8М2Ф (ДИ52)
|Designation GOST Cyrillic||03Х11Н8М2Ф|
|Designation GOST Latin||03X11H8M2F|
|By chemical elements||03Cr11Н8Mo2V|
|Designation GOST Cyrillic||ДИ52|
|Designation GOST Latin||DI52|
|By chemical elements||CuИ52|
03Х11Н8М2Ф steel is used: for the production of tube billet and pipes, long products semi-finished mill products (sheets, strips, rods) and forgings used in the production method hot formed or cold machining of various parts of equipment in the energy and heavy engineering.
|Blanks. Of the workpiece. Slabs||В31||TU 14-1-1214-75, TU 14-1-3486-82|
|Processing of metals by pressure. Forgings||В03||TU 14-1-2274-77, TU 14-1-5287-94|
|Bars and shapes||В32||TU 14-1-2573-78, TU 14-1-5286-94|
|Sheets and strips||В33||TU 14-1-4014-85, TU 14-1-4391-88|
According to TU 14-1-5287-94, the chemical composition is given for steel grade 03H11N8M2F-ID (DI52-ID).
According to TU 14-1-5286-94, the chemical composition is given for steel grades 03H11N8M2F-VD (D52-VD and 03H11N8M2F-ID, (D52-ID) .The finished product is allowed to deviate by chemical composition: carbon +0.0050% for chromium -0.50%, for nickel -0.20%, for sulfur and phosphorus, provided that their total content is not more than 0.025% .On demand of the consumer, steel is supplied with niobium (Nb), the mass fraction of which should be within 0, 05-0,15% The mass fraction of the residual elements is in accordance with GOST 5632. At the request of the consumer, the steel is supplied with a chemical composition "select" for nickel, the new share of which should be within the range of 8.30-8.60%, while the allowable deviation by the mass fraction of nickel is plus 0.50% and the aluminum content is not more than 0.15%.
According to TU 14-1-3486-82, the chemical composition is given for steel grade 03H11N8M2F-VD (DI52-VD). At the request of the consumer, steel is supplied with a content of niobium in the range of 0.05-0.15%. Deviations in the content of chemical elements are allowed: carbon +0.0050%, chromium-0.50%, sulfur and phosphorus, with a total content of not more than 0.020%, nickel -0.20%. At the request of the customer, agreed with the customer and specified in the order, the steel is supplied with a chemical composition of nickel "select" 8.30-8.60% with a tolerance of + 0.50%. The residual content of the elements in the steel should not exceed: copper 0.20%, niobium 0.15%, titanium 0.15%, tungsten 0.20% ..
According to TU 14-1-1214-75 the chemical composition is given for steel grade 03H11N8M2F-VD (DI52-VD). At the request of the consumer, the steel is supplied with a chemical composition of nickel "select" with a content of 8.30-8.60% with a tolerance of + 0.30%. Deviations in the chemical composition of the elements are permissible in the finished product: carbon + 0.0050%, chromium-0.50%, sulfur and phosphorus, with a total content of not more than 0.025%, nickel -0.20%. The content of residual elements in steel is according to GOST 5632.
Steel with the marking 03Х11Н8М2ФУ-ВД (ДИ52У-ВД) - for limited use and the silicon content should not exceed 0,15%, phosphorus - 0,010%. The total content of sulfur and phosphorus should not exceed 0.020%. The content of residual elements should not exceed: copper and tungsten - 0.20% each; niobium and titanium - 0.15% each. The content of the residual elements can not be determined.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||y, %||KCU, kJ/m2|
|Forging as supplied on the other 14-1-5287-94|
|Bars and stripes on the other 14-1-5286-94. The longitudinal samples. Quenching in water or air from 950±15 °With + Double quenching in water or in air 700±15 °C (exposure for 30 minutes) with a mandatory cooling to room temperature + Aging at 490-510 °C (exposure 2 hours) air cooling. The graph indicates the value of KCU KCU+20°C/KCU-196°C|
|Bars and stripes on the other 14-1-5286-94. The longitudinal samples. Quenching in water or air from 950±15 °C + Vacation at 250±10 °C (exposure 2 hours), air cooling. The graph indicates the value of KCU KCU+20°C/KCU-196°C|
|Bars and stripes on the other 14-1-5286-94. The longitudinal samples. Quenching in water or air from 950±15 °C + Vacation at 350±10 °C (exposure 2 hours), air cooling. The graph indicates the value of KCU KCU+20°C|
|Tubular billet on the other 14-1-3486-82. Annealing in air from 950±10 °C (for longitudinal samples with allowance for grinding)|
|Tubular billet on the other 14-1-3486-82. Annealing in air from 950±10 °C + Vacation at 250±10 °C (exposure 2 hours), air cooling (longitudinal samples with allowance for grinding when debugging)|
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|
|y||The relative narrowing|
|Pressure treatment||Of forging of billets on the other 14-1-3486-82 must be at least 5. For billets with a diameter of 180 mm of forging should be not less than 2.6.|
|Macrostructure and pollution||Macrostructure of steel billets on the other 14-1-3486-82 when checking on the etched templeto should not be visible without using the magnifying devices of the bubbles, captured, fistulas, cracks, residues, shrinkage, inclusions, delaminations. The permissible defects of the macrostructure shall not exceed: Central porosity - 1 point; - point heterogeneity - 1 point; - phase separation in the square - 1 point; - for layer-by-layer crystallization and the bright loop - 3 score.|
|Microstructure||The contents of alpha phase in the tube blank on the other 14-1-3486-82 should not exceed 1.5 points.|