Steel 35L

  • 08L steel
  • 15L steel
  • Steel 20L
  • Steel 25L
  • 30L steel
  • Steel 35L
  • 40L steel
  • 45L steel
  • 50L steel

    • Designation

    Name The value
    Designation GOST Cyrillic 35Л
    Designation GOST Latin 35L
    Transliteration 35L
    By chemical elements 35

    Description

    35L steel is used: for the production of castings of machine beds, rolling mill, gears, rods, runners, valves, beams, diaphragms, rollers, rolls, brackets and other parts operating under the influence of average static and dynamic loads; casting parts, steam, gas, hydraulic turbines and axial compressors operating at temperatures from -40 to +350 °C; the castings 2 and 3 parts of valves and actuators to it (parts of high strength and hardness, in addition to enclosures and lids), with the working environment temperature from -30 up to +400 °C without limitations nominal operating pressure; casting parts mining and metallurgical machinery; casting investment casting for aircraft industry group I — loaded items with the specific requirements for density and mechanical properties: high load brackets, sealed the housing, the frames of gyroscopes, stabilizers, etc. and group II — non-loaded and lightly loaded parts, rings, flanges, fittings, leaking instrument cabinets, etc.

    Note

    Steel pearlitic class.
    Casting parts of pipe fittings of steel 35L are supplied only desvarieux of structural elements.

    Standards

    Name Code Standards
    Castings with special properties (iron and steel) В83 KSt 81-033:2009, TU 4112-78269737-008-05
    Steel castings В82 GOST 977-88, OST 108.961.04-80, OST 26-07-402-83, OST 24.920.01-80, OST 3-4365-79, OST 1 80059-83, OST 5Р.9285-95, TU 108.11.352-87, TU 108-11-539-87, ST ЦКБА 014-2004
    Hard alloys, ceramic-metal products and metal powder В56 OST 107.750001.001-91
    Classification, nomenclature and General rules В20 OST 84-218-85
    Welding and cutting metals. Soldering, riveting В05 RTM 108.020.122-78

    Chemical composition

    Standard C S P Mn Si Fe
    KSt 81-033:2009 0.32-0.4 ≤0.04 ≤0.04 0.45-0.9 0.2-0.52 Rest
    Fe is the basis.
    The mass fraction of S and P content is indicated for 1 group of castings from the base steel. The content of sulfur and phosphorus in the castings of groups 2 and 3, in sour and basic open-hearth steel - see Table 4a in GOST 977-88.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d y, % KCU, kJ/m2 HB, MPa
    Casting in sand molds. Annealing at 850 °C, cooling with the furnace
    30 ≥255 ≥530 ≥19 ≥34 ≥490 146
    Normalization at 860-880 °C, air cooling to 300-350 °C, exposure 2 h at 300-350 °C + vacation at 600-620 °C, exposure for 1 h in a furnace to 500 °C, air cooling (named place of clippings sample)
    100 245-250 350-510 13-20 16-25 - 136-156
    200 295-310 560-590 17-27 19-40 - 163-196
    Casting parts of gas turbines. Normalization at 860-880 °C + vacation at 600-630 °C, air cooling
    - ≥275 ≥490 ≥15 ≥25 ≥343 137-166
    Normalization at 860-880 °C, air cooling to 300-350 °C, exposure 2 h at 300-350 °C + vacation at 600-620 °C, exposure for 1 h in a furnace to 500 °C, air cooling (named place of clippings sample)
    10 235-275 550-590 22-28 28-43 - 143-156
    Castings for shipbuilding. Normalization at 860-890 °C + vacation at 630-670 °C, air cooling
    - ≥280 ≥500 ≥17 ≥27 ≥350 137-166
    Casting. Quenching with 860-880 °C + vacation at 600-630 °C
    100 ≥343 ≥540 ≥16 ≥20 ≥294 -
    Normalization at 860-880 °C, air cooling to 300-350 °C, exposure 2 h at 300-350 °C + vacation at 600-620 °C, exposure for 1 h in a furnace to 500 °C, air cooling (named place of clippings sample)
    100 245-250 400-520 13-20 16-25 - 143-156
    200 275-295 530-550 13-18 14-28 - 163-170
    30 235-295 540-570 23-28 33-42 - 137-156
    50 290-450 570-590 22-27 56-64 - 154-186
    After normalization and tempering quenching in oil 860-870 °C + vacation at 620-630 °C, exposure 3 hours, air cooling (named place of clippings sample)
    100 345-380 570-600 22-33 36-58 - 170
    200 300-335 550-600 18-26 25-36 - 156-170
    10 330-370 620-660 24-28 44-49 - 162-206
    100 345-365 560-580 24-29 28-48 - 170
    200 300-330 550-580 16-25 21-34 - 156-170
    30 365-400 610-640 23-29 47-57 - 156-187
    50 365-550 590-640 22-31 33-66 - 162-178

    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
    d Elongation after rupture
    y The relative narrowing
    KCU Toughness
    HB Brinell hardness number

    Physical characteristics

    Temperature Е, HPa G, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C С, J/(kg · °C)
    0 212 82 7830 53 172 - -
    20 212 - 7830 53 172 - -
    100 206 80 - 51 223 111 470
    200 201 78 - 49 301 12 491
    300 192 75 - 45 394 129 512
    400 176 68 - 42 497 135 533
    500 163 63 - 39 623 139 554
    600 151 58 - 35 771 145 580
    700 131 50 - 31 935 148 613
    800 118 45 - 27 1115 119 710
    900 - - - 27 1154 119 710
    1100 - - - - - 125 701

    A description of the physical symbols

    Name Description
    Е The normal elasticity modulus
    r Density
    l Coefficient of thermal conductivity
    С Specific heat

    Technological properties

    Name The value
    Weldability Limited weldability. Welding methods: SMAW, ADS under gas protection electroslag welding. Recommended heating and subsequent heat treatment.
    Склонность к отпускной хрупкости Tend not.
    Flock-sensitive sensitivity not sensitive.
    Welding defects Welding defects of castings after cutting is carried out with preliminary and attendant heating to 150-200 °C. for semi-automatic welding in carbon dioxide environment used welding wire SV-08G2S diameter of 2 mm at a current of 380-420 A. Welding defects by manual welding is done with electrodes Э50А type (GOST 9467) brand SSSI-13/55. Before mechanized welding of large defects of the edge samples, it is recommended to coat the electrodes of these brands. The thickness of the facing layer of 8-10 mm. After welding should slow cooling with rate 50 °C/h.