|Designation GOST Cyrillic||07Х3ГНМЮА|
|Designation GOST Latin||07X3GHMJuA|
|By chemical elements||07Cr3MnНMoAl|
07Х3ГНМЮА steel is used: for the manufacture of hot-rolled bars and forgings, pipe billets and flat steel products, used for the production of parts of machinery and special purpose; cold-deformed and hot-deformed tubes for the production of solid cylinders downhole sucker rod pumps.
Steel low carbon martensitic class.
|Sheets and strips||В23||TU 14-1-3370-2006|
|Sheets and strips||В33||TU 14-1-3370-82|
|Bars and shapes||В32||TU 14-1-4229-87|
|Blanks. Of the workpiece. Slabs||В31||TU 14-1-4230-87, TU 14-1-4408-88|
|Steel pipes and fittings to them||В62||TU 14-159-227-93, TU 14-3-1756-91|
|Processing of metals by pressure. Forgings||В03||TU 3-1078-78|
According to TU 14-1-4229-87 and TU 14-1-4408-88 the chemical composition is given for steel grade 07H3GNMYUA. The presence of tungsten to 0.20%, titanium to 0.30% and vanadium to 0.050% are not a defect.
According to TU 14-1-4229-87 ready rolled products deviations from the chemical composition standards are allowed in accordance with GOST 4543, aluminum +0.020%, -0.0050%; for carbon ± 0.010%.
According to TU 14-1-4408-88, in the finished pipe billet, deviations in chemical composition are allowed: by carbon +0.010%, for silicon + 0.030 / -0.020%, for manganese ± 0.050%, for aluminum +0.020%, for chromium ± 0.050 %, nickel -0.050%, molybdenum ± 0.020%. The steel is smelted in an electric arc furnace or in a main open-hearth furnace, followed by treatment in a ladle with synthetic slags and liquid ligature.
According to TU 14-1-3370-2006 the chemical composition is given for steel grade 07H3GNMYUA. The presence in the steel of the mass fraction of tungsten to 0.20%, titanium to 0.030% and vanadium to 0.050% is not a rejection sign. In the finished rolled products, deviations from the chemical composition standards are allowed in accordance with GOST 4543, aluminum + 0.020 / -0.0050%, carbon ± 0.010%.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||y, %||KCU, kJ/m2|
|Flats on the other 14-1-3370-2006. Hardening in air, 900-940 °C + Vacation at 250-450 °C (exposure 2 hours), air cooling. The graph shows the indices of KCU KCU+20°C/KCU-50°C|
|Flats on the other 14-1-3370-2006. With annealing 650-680 °C, air cooling + Tempering air with 900-940 °C + Vacation at 250-450 °C (exposure 2 hours), air cooling. The graph shows the indices of KCU KCU+20°C/KCU-50°C|
|Bars hot rolled on the other 14-1-4229-87 and the tubular billet, rolled and forged on the other 14-1-4408-88. Annealing in air from 930 °C±10 ° C + Vacation at 200-400 °C (exposure 2 hours), air cooling (samples transverse)|
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|
|Flock-sensitive sensitivity||A tube blank on the other 14-1-4408-88 are delivered after anti-flake (obezvrezivate), ATI|
|Pressure treatment||Clan (extract ratio) tube blank on the other 14-1-4408-88 excluding precipitation should be at least 1.6.|
|Macrostructure and pollution||Macrostructure of steel hot-rolled bars on the other 14-1-4229-87 and a tube blank on the other 14-1-4408-88 on the etched transverse templeto or fracture should not have podnasadochnogo looseness, bubbles, cracks, placenow, delaminations, voids and foreign inclusions that are visible without using the magnifying devices. Defects in the macrostructure should not exceed norms: - point heterogeneity - 2 points; - the Central porosity - 2 points; - exudation square - 2 points; - Pousada liquation - 1 points. Common spotted and boundary liquation, subcortical bubbles and intergranular cracks are not allowed. The contamination of steel billets, non-metallic inclusions on the average score must not exceed: - oxides of stroke (OS) - 3.0 points; - point oxides (ON) - 2.0 points; - silicates fragile (CX) - 3.0 points; - silicates plastic (SP) - 3.0 points; - silicates, non-deformed (CH) - 2.0 points; - sulphides (C) - 3.0 points.|