|Designation GOST Cyrillic||05Х12Н2М|
|Designation GOST Latin||05X12H2M|
|By chemical elements||05Cr12Н2Mo|
05Х12Н2М steel is used: for the production of bars with a diameter of 6−30 mm, forged billets, pipe billets and cold-drawn pipe intended for subsequent cold machining or hot for subsequent machining (stamping, forging, rolling, etc.) in the manufacture of parts of valves and pipelines of nuclear power installations.
Partenitskaya high-chromium steel.
|Processing of metals by pressure. Forgings||В03||TU 108.11.884-87|
|Bars and shapes||В32||TU 14-1-2761-79, TU 14-1-2837-79, TU 14-131-979-2001|
|Blanks. Of the workpiece. Slabs||В31||TU 14-1-2836-79, TU 14-1-4995-91|
|Steel pipes and fittings to them||В62||TU 14-3-1010-81, TU 14-3-873-79|
According to TU 14-1-2761-79, TU 14-131-979-2001 the chemical composition is given for steel grade 05X12N2M-VI, smelted in vacuum induction furnaces. In the metal, the residual content of tungsten, vanadium and cobalt is additionally controlled. Allowed the introduction of zirconium or yttrium not more than 0.10% (calculated) and the introduction of calcium no more than 0.050% (calculated). Deviations in chemical composition are allowed in the finished product in accordance with GOST 5632.
According to TU 14-1-2836-79, the chemical composition is given for steel grade 05X12N2M, smelted in electric arc or plasma arc furnaces. Steel smelted in plasma arc furnaces is marked with the stamp 05Х12Н2М-ПТ. In the steel deviations in chemical composition are allowed: for molybdenum ± 0.050%, for chromium-0.50%, for nitrogen + 0. 010%. Deviations in other elements and mass fraction of residual elements in accordance with GOST 5632. Modification with cerium or calcium is allowed not more than 0.10% (calculated). The mass fraction of cerium or calcium is not determined by chemical analysis.
According to TU 14-1-4995-91 the chemical composition is given for steel grades 05Х12Н2М and 05Х12Н2М-ПТ. Deviations in finished products are allowed according to the chemical composition: chromium -0.50%, nitrogen +0.010%, molybdenum ± 0.050%. Deviations in other elements and mass fraction of residual elements - according to GOST 5632. Modification of steel by cerium or calcium is not more than 0.10% (calculated). The mass fraction of cerium and calcium is not determined by chemical analysis.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||y, %||KCU, kJ/m2|
|Bars with special surface finish on the other 14-131-979-2001. The longitudinal samples. Normalization at 980±10 °C, air cooling + Vacation at 680±10 °C, air cooling|
|Tubular billet on the other 14-1-2761-79. Normalization at 980±10 °C, air cooling + Vacation at 680±10 °C, air cooling|
|Tubular billet on the other 14-1-2836-79 the 14-1-4995-91. Normalization at 980±10 °C, air cooling + Vacation at 680±10 °C, air cooling|
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|
|Macrostructure and pollution||On the other 14-1-2836-79 the macrostructure of the billet should not have cracks, subcortical bubbles, residues shrinkage, foreign non-metallic microflute, delamination and other defects to the naked eye. Permitted in the macrostructure of the Central porosity, point heterogeneity and phase separation of a square no more than 2 points on the scale GOST 10243. The tubular billet is checked for the presence of non-metallic inclusions. The content of nonmetallic inclusions in the evaluation the average score must not exceed: - sulphides (S) ≤ 2,0; - oxides of point () ≤ 2,0; - oxides of stroke (OS) ≤ 3,0; - silicates fragile (CX) ≤ 3,0; - silicates plastic (SP) ≤ 3,0; - silicates undeformed (SN) ≤ 3,0.|
|Particularities of production of goods||On the other 14-1-2836-79 tubular billet is supplied without heat treatment. The degree okowa a tube blank must be at least 5 for a diameter of 90-160 mm and at least 4 for diameter over 160 to 180 mm inclusive.|