|Designation GOST Cyrillic||03Х20Н16АГ6|
|Designation GOST Latin||03X20H16AG6|
|By chemical elements||03Cr20Н16NMn6|
03Х20Н16АГ6 steel is used: for the manufacture of large welded tanks and vessels working under pressure at temperatures from -20 to +269 °C, of structures operating at cryogenic temperatures.
Steel replacement Х18Н10 for equipment operating in 55% nitric acid, srednemolekulyarnyh environments and industrial atmosphere.
|Processing of metals by pressure. Forgings||В03||ST ЦКБА 010-2004|
|Thermal and thermochemical treatment of metals||В04||ST ЦКБА 016-2005|
|Bars and shapes||В32||TU 14-1-2922-80|
|Sheets and strips||В33||TU 14-1-3291-81|
|Blanks. Of the workpiece. Slabs||В31||TU 14-1-4653-89, TU 14-1-4655-89|
According to TU 14-1-3291-81, the chemical composition is given for steel grade 03Х20Н16АГ6.
According to TU 14-1-2922-80 the chemical composition is presented for steel grade 03Х20Н16АГ6-Ш. The residual content of aluminum in steel, determined by the ladle sample, is not more than 0.040%. The permissible deviations in nickel are -0.50%, for manganese + 0.50%, for silicon + 0.20%, for chromium -1.00%.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||y, %||KCU, kJ/m2|
|Procurement of parts of pipeline fittings from steel 03Х20Н16АГ6-W at ST CKBA 016-2005: Quenching in water from 1030-1070 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h), KCU-196 °C|
|Bars hot rolled and forged on the other 14-1-2922-80. Quenching in water or air with 1030-1070 °C|
|Rolled steel in the delivery state. Quenching in water from 1000 °C|
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|
|Weldability||Steel is welded without restrictions. To relieve residual stresses of welded assemblies operating at cryogenic temperatures used for tempering the air from 950-1050 °C (aged for at least 2.5 minutes/mm of maximum wall thickness, but not less than 1 hour).|
|Macrostructure and pollution||Macrostructure of steel 03Х20Н16АГ6-W on the other 14-1-2922-80 should not have traces of shrinkage, porosity, bubbles, delaminations, cracks, inclusions, visible without using the magnifying devices. Contamination of metal non-metallic inclusions is determined from each heat and shall not exceed (maximum score): - sulfides - 1 point; - stroke oxides, silicates plastic - 2 points; the point oxides, silicates fragile - 1.5 points; - nitrides and carbonitrides - 3 score.|
|Toughness||Test on toughness of steel 03Х20Н16АГ6-W is performed at a temperature of -196°C according to GOST 22848 on samples of type 1.|