Steel S345

  • C375 steel
  • C590K steel
  • C590 steel
  • C440D steel
  • C440 steel
  • C390K steel
  • C390D steel
  • C390 steel
  • C375D steel
  • C345K steel
  • C345D steel
  • C345 steel
  • C285 steel
  • C275 steel
  • C255 steel
  • C245 steel
  • C235 steel

    • Designation

    Name The value
    Designation GOST Cyrillic С345
    Designation GOST Latin C345
    Transliteration S345
    By chemical elements -

    Description

    S345 steel is used: for the manufacture of hot-rolled structural shapes (angles, I-beams, channels), sheet, universal broadband rental and roll-formed profiles designed for construction of steel structures with welded and other connections.

    Standards

    Name Code Standards
    Classification, nomenclature and General rules В20 GOST 27772-88

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu N As
    GOST 27772-88 ≤0.15 ≤0.04 ≤0.035 1.3-1.7 ≤0.3 ≤0.8 ≤0.3 Rest ≤0.3 ≤0.008 ≤0.08
    Fe is the basis.
    According to GOST 27772-88 for steel smelted in electric furnaces, the content of N ≤ 0.012% is allowed. When smelting steel from the Kerch ore, the mass fraction of arsenic does not exceed 0.15%, while the mass fraction of phosphorus should not be more than 0.030%. For steel C345 it is possible to add aluminum and titanium from the calculation of the mass fraction of titanium at the rolling mill of 0.01-0.03%. At the request of the consumer in steel, the mass fraction of phosphorus should not be more than 0.030%, and sulfur - not more than 0.035%.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % KCU, kJ/m2
    Plates and wide universal rental in the state of delivery (KCU after ageing mechanical)
    10-20 ≥325 ≥470 ≥21 ≥294
    2-3.9 ≥345 ≥490 ≥15 ≥294
    20-40 ≥305 ≥460 ≥21 ≥294
    4-10 ≥345 ≥490 ≥21 ≥294
    40-60 ≥285 ≥450 ≥21 ≥294
    60-80 ≥275 ≥440 ≥21 ≥294
    80-160 ≥265 ≥430 ≥21 ≥294
    Structural steel in delivery condition (KCU after ageing mechanical)
    10-20 ≥325 ≥470 ≥21 ≥294
    20-40 ≥305 ≥460 ≥21 ≥294
    4-10 ≥345 ≥490 ≥21 ≥294

    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
    KCU Toughness

    Technological properties

    Name The value
    Weldability without restrictions