Steel 50

  • Steel 38 (38-PV)
  • Steel 20-KS
  • 20-KHS steel
  • 20K steel
  • Steel 20kp
  • 20ps steel
  • 20YuA steel
  • 20YUCH steel (20YUCH)
  • Steel 22ZhR
  • 22K Steel
  • Steel 25
  • Steel 25ps
  • Steel 30
  • Steel 35
  • Steel 20 (20A; 20B)
  • Steel 40 (40A)
  • Steel 43 (43-PV)
  • Steel 45
  • Steel 45T (45ST)
  • Steel 50
  • Steel 54 (54pp)
  • Steel 55
  • Steel 58 (55pp)
  • Steel 60
  • Steel 60pp (60pp-PV)
  • Steel 90 (BP5)
  • Steel D
  • Steel DB
  • E55 steel (NIPRA)
  • Steel 11kp
  • Steel 0501
  • Steel 05kp
  • Steel 08
  • Steel 08kp
  • 08ps steel
  • Steel 08Fkp
  • Steel 08U (08UA; 08U2 (08U2A))
  • 08YUP steel
  • 08YuPR steel
  • Steel 10
  • 10kp steel
  • 10ps steel
  • 10YuA (10Yu) steel
  • 18YuA steel
  • Steel 11MTUA
  • 11YuA steel
  • 12K Steel
  • Steel 15 (15A)
  • 15K Steel
  • Steel 15kp
  • 15ps steel
  • 15FSA steel
  • 15YuA steel
  • 16GNMA steel
  • 16K Steel
  • 18K Steel
  • 18kp steel

    • Designation

    Name The value
    Designation GOST Cyrillic 50
    Designation GOST Latin 50
    Transliteration 50
    By chemical elements 50

    Description

    50 steel is used: after normalization with the release or quenching a vacation — for the manufacture of gear wheels, rolling shafts, rods, heavy-duty axles, tires, light duty springs and leaf springs, coulters, finger track links, couplings gear boxes, housings of the injectors and other parts operating friction; cold-rolled heat-treated ribbon with a thickness of 0.05 to 1.30 mm for the manufacture of spring details and springs, with the exception of the winding; tinned wire for the manufacture of tires rotors of electric machines; remisol heat-treated tin-plated wire, designed for the manufacture of galev to reminyl devices of textile machines; forging rolls for hot and cold rolling of metals without mechanical processing.

    Note

    The degree of deoxidation — SP.

    Standards

    Name Code Standards
    Bars and shapes В32 GOST 1050-88, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, GOST В 5160-89, GOST 1050-2013, TU 14-1-5414-2001, TU 14-1-2118-77, TU 14-1-2884-80, TU 14-11-245-88, TU 14-1-5480-2004, TU 0950-295-00187211-2000, TU 14-1-2252-2007, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008
    Fittings, components and parts for railway rolling stock Д55 GOST 11530-93
    Sheets and strips В33 GOST 1577-93, TU 14-1-4516-88, TU 14-1-4561-88
    Tape В34 GOST 2284-79, GOST 10234-77, GOST 21996-76, TU 14-4-1011-79, TU 14-4-105-72, TU 14-4-860-77
    Steel pipes and fittings to them В62 GOST 3262-75, GOST 20295-85, GOST 24950-81, TU 14-3-1428-86
    Tape В24 GOST 3560-73
    Steel wire medium and high carbon В72 GOST 3920-70, GOST 7372-79, GOST 9124-85, GOST 9161-85, GOST 9389-75, GOST 9850-72, GOST 17305-91, GOST 26366-84
    Machines and equipment for metallurgical and foundry industry Г44 GOST 5399-69
    Bars and shapes В22 GOST 5422-73, GOST 8239-89, GOST 8240-97, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8319.0-75, GOST 8509-93, GOST 8510-86, GOST 9234-74, GOST 11474-76, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9087-84
    Sheets and strips В23 GOST 82-70, GOST 14918-80, GOST 16523-97, GOST 19903-74, GOST 16523-89, GOST 16523-70, GOST 103-2006, GOST 19903-90, TU 14-1-486-73, TU 14-1-1934-76
    Processing of metals by pressure. Forgings В03 GOST 8479-70, TU 108-11-905-87, ST ЦКБА 010-2004
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu N As
    GOST 1050-88 0.47-0.55 ≤0.04 ≤0.035 0.5-0.8 ≤0.25 0.17-0.37 ≤0.3 Rest ≤0.3 ≤0.006 ≤0.08
    Fe is the basis.
    According to GOST 1050-88, the nitrogen content is specified for the steel of the oxygen-converter method of smelting. For all other types of smelting, the nitrogen content was N≤0.008%.

    Mechanical properties

    Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % d4 d y, % KCU, kJ/m2 HB, MPa HV, MPa
    Tape flatted average strength of 0.1-4.0 mm according to GOST 10234-77 in the state of delivery (indicated delivery)
    - - - 780-1130 - - - - - - -
    - - - 830-980 - - - - - - -
    - - - 980-1130 - - - - - - -
    - - - ≤740 - - ≥10 - - - -
    - - - ≤520 - - - - - - -
    Cold-rolled steel strip of 0.1-4.0 mm in the delivery state according to GOST 2284-79
    - - - 740-1080 - - - - - - -
    - - - 440-740 - ≥13 - - - - -
    - - - 440-610 - ≥13 - - - - -
    Steel, hot-rolled, forged, calibrated and silverfish 2nd category after normalization
    ≤25 - - ≥630 ≥14 - - ≥40 - - -
    Steel grooved 5-th category
    - - - ≥660 ≥6 - - ≥30 - - -
    - - - ≥560 ≥12 - - ≥40 - - -
    Forgings. Normalization
    100-300 - ≥275 ≥530 ≥17 - - ≥38 ≥334 156-197 -
    100 - ≥315 ≥570 ≥17 - - ≥38 ≥383 167-207 -
    Hot-rolled sheet in the delivery condition. Group strength К490В
    ≤2 - - 490-720 - ≥12 - - - - -
    2-3.9 - - 490-720 - ≥13 - - - - -
    Cold-rolled sheet in the delivery condition. Group strength К490В
    ≤2 - - 490-720 - ≥13 - - - - -
    2-3.9 - - 490-720 - ≥14 - - - - -
    Tape cold-rolled heat-treated (0,05-1,30 mm) for spring parts and springs according to GOST 21996-76 (listed group strength tape)
    - - - 1270-1570 - - - - - - 375-485
    - - - 1580-1860 - - - - - - 486-600
    - - - ≥1860 - - - - - - ≥600
    Forgings. Hardening in water from 850 °C + Vacation at 580-600 °C, air cooling
    ≤50 - ≥530 ≥760 ≥15 - - ≥50 ≥579 - -
    120-160 - ≥450 ≥740 ≥13 - - ≥40 ≥383 - -
    160-200 - ≥430 ≥720 ≥13 - - ≥35 ≥196 - -
    50-120 - ≥470 ≥740 ≥13 - - ≥40 ≥383 - -
    Forgings. Normalization at 830-860 °C, air cooling + Vacation at 580-650 °C air cooling or furnace
    101-200 - ≥305 ≥610 ≥16 - - ≥38 ≥334 - -
    201-300 - ≥305 ≥610 ≥14 - - ≥33 ≥285 - -
    301-500 - ≥295 ≥590 ≥12 - - ≥30 ≥245 - -
    501-800 - ≥285 ≥570 ≥12 - - ≥28 ≥196 - -
    Steel heat-treated, hot-rolled and hot-rolled with special surface finishing calibrated and calibrated with special surface finish
    - - - - - - - - - ≤217 -
    Sheet autogeny or vysokoopasnye
    ≤80 - - ≥580 ≥17 - - - - - -
    Workpiece diameter of 40 mm. Quenching in water 840 °C
    - 400 ≥600 ≥830 ≥14 - - ≥50 ≥628 ≥240 -
    - 500 ≥530 ≥760 ≥15 - - ≥56 ≥863 ≥215 -
    - 600 ≥450 ≥680 ≥17 - - ≥64 ≥1364 ≥190 -
    Workpiece diameter 60 mm. Quenching in water 840 °C
    - 400 ≥550 ≥770 ≥14 - - ≥48 ≥549 ≥217 -
    - 500 ≥490 ≥710 ≥15 - - ≥55 ≥687 ≥200 -
    - 600 ≥420 ≥630 ≥19 - - ≥63 ≥1060 ≥180 -
    A sample with diameter 10 mm, length 50 mm, deformed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s
    - - ≥87 ≥115 ≥39 - - ≥97 - - -
    - - ≥45 ≥81 ≥45 - - ≥100 - - -
    - - ≥16 ≥50 ≥43 - - ≥100 - - -
    - - ≥11 ≥36 ≥35 - - ≥100 - - -
    - - ≥8 ≥28 ≥41 - - ≥100 - - -
    - - ≥8 ≥22 ≥49 - - ≥100 - - -

    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
    d4 Elongation after rupture
    d Elongation after rupture
    y The relative narrowing
    KCU Toughness
    HB Brinell hardness number
    HV The Vickers hardness

    Physical characteristics

    Temperature Е, HPa G, HPa l, W/(m · °C) a, 10-6 1/°C С, J/(kg · °C)
    100 213 87 48 112 487
    200 207 84 47 12 500
    300 200 81 44 128 517
    400 180 71 41 134 533
    500 171 67 38 139 559

    A description of the physical symbols

    Name Description
    Е The normal elasticity modulus
    G Modulus of elasticity shear torsion
    r Density
    l Coefficient of thermal conductivity
    R UD. the resistivity
    a The coefficient of linear expansion
    С Specific heat

    Technological properties

    Name The value
    Weldability Difficult weldability. The welding methods of the RDS and CBS. Recommended heating and subsequent heat treatment.
    Склонность к отпускной хрупкости tend not
    The temperature of forging Start - 1250 °C, the end - of 800 °C. the cross Sections up to 400 mm are cooled in air.
    Flock-sensitive sensitivity insensitive
    Machinability In the hot rolled condition when blower SB 270 and HB=630 MPa Kn TV.SPL.=0.85 Kn b.St.=0.80