Steel 03Х20Н16АГ6

  • Steel 03Х13Н8Д2ТМ (EP699)
  • Steel 03Х19АГ3Н10 (DI105)
  • Steel 03Х19Г10Н7М2
  • Steel 03X20H16AG6
  • Steel 05X18N10AG10MB
  • Steel 10Х14Г14Н4Т (ЭИ711; Х14Г14Н4Т)

    • Designation

    Name The value
    Designation GOST Cyrillic 03Х20Н16АГ6
    Designation GOST Latin 03X20H16AG6
    Transliteration 03H20N16AG6
    By chemical elements 03Cr20Н16NMn6

    Description

    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.

    Note

    Steel replacement Х18Н10 for equipment operating in 55% nitric acid, srednemolekulyarnyh environments and industrial atmosphere.

    Standards

    Name Code Standards
    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

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe N
    TU 14-1-2922-80 ≤0.03 ≤0.02 ≤0.025 4-7 20-22 ≤0.4 15-16 Rest 0.22-0.28
    TU 14-1-3291-81 ≤0.03 ≤0.02 ≤0.025 5-7 20-22 ≤0.4 15-16 Rest 0.22-0.3
    Fe is the basis.
    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%.

    Mechanical properties

    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
    ≤60 ≥343 ≥637 ≥30 - ≥1177
    Bars hot rolled and forged on the other 14-1-2922-80. Quenching in water or air with 1030-1070 °C
    25 ≥365 ≥660 ≥30 - ≥1177
    25 ≥345 ≥640 ≥30 - ≥1177
    Rolled steel in the delivery state. Quenching in water from 1000 °C
    ≥410 ≥780 ≥52 ≥75 ≥2200

    Description mechanical marks

    Name Description
    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
    KCU Toughness

    Technological properties

    Name The value
    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.