Bronze Broc4-3

  • Bronze BrMcO7-3
  • Bronze БрОФ2-0,25
  • Bronze БрОФ4-0,25
  • Bronze БрОФ6,5-0,15
  • Bronze БрОФ6,5-0,4
  • Bronze БрОФ7-0,2
  • Bronze БрОФ8-0,3
  • Bronze БрОЦ4-3
  • Bronze БрОЦС4-4-2,5
  • Bronze БрОЦС4-4-4
  • Bronze БрХ0,3О0,3Цр0,1 (БрХОЦр0,3-0,3-0,1)

    • Designation

    Name The value
    Designation GOST Cyrillic БрОЦ4-3
    Designation GOST Latin BpOTs4-3
    Transliteration BrOTs4-3
    By chemical elements BaSnZn4-3

    Description

    Bronze Broc4−3 is used: for the manufacture of semi-finished wires, ribbons, strips, rods, used in electrical and mechanical engineering; current-carrying springs, contacts, plug connectors, parts of chemical equipment; round welding wire and welding rods round drawn and extruded with a diameter of from 1.2 to 8.0 mm, designed for manual welding in shielding gases of copper and mechanized submerged arc welding of copper and brass; round welding wire and welding rods round drawn and extruded with a diameter of 1.4 to 4.0 mm, designed for manual welding in shielding gases of tin-phosphor bronze and tin bronze.

    Standards

    Name Code Standards
    Welding and cutting metals. Soldering, riveting В05 GOST 16130-90
    Sheets and strips В53 GOST 1761-92, TU 48-21-180-90
    Non-ferrous metals, including rare, and their alloys В51 GOST 28873-90, GOST 5017-2006, OST 4.021.009-92
    Bars В55 OST 4.021.023-92
    Tape В54 OST 4.021.083-92, TU 48-21-184-90
    Wire from nonferrous metals and their alloys В74 OST 4.021.107-92, TU 48-21-871-89

    Chemical composition

    Standard S P Si Ni Fe Cu Al Zn Sn Sb Pb Bi Mg
    GOST 5017-2006 ≤0.007 ≤0.03 ≤0.005 ≤0.3 ≤0.05 Rest ≤0.002 2.7-3.3 3.5-4 ≤0.002 ≤0.02 ≤0.002 ≤0.007
    GOST 16130-90 ≤0.007 ≤0.03 ≤0.005 ≤0.3 ≤0.05 Rest ≤0.002 2.7-3.3 3.5-4 ≤0.002 ≤0.02 ≤0.002 ≤0.007
    Cu is the basis.
    According to GOST 5017-2006, the total content of other impurities (not specified in the chemical composition) should be ≤ 0,20%. In bronze, the mass fraction of titanium is not more than 0.12% due to the mass fraction of copper, which is not taken into account in the total amount of other impurities.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % d10
    Strip and cold rolled strip according to GOST 1761-92, OST 4.021.083-92 in the state of delivery
    ≥0.5 ≥110 ≥290 - ≥38
    0.5 ≥110 ≥290 - ≥35
    ≥670 ≥690 - -
    ≥0.5 290-510 350-540 - ≥8
    0.5 290-510 350-540 - ≥4
    ≥0.5 510-670 540-690 - ≥4
    0.5 510-670 540-690 - ≥2
    Cold-drawn wire for the manufacture of elastic elements in the delivery state (solid) OST 4.021.107-92 (longitudinal samples)
    0.12-2.5 - ≥882.9 - ≥0.5
    2.5-4 - ≥833.8 - ≥1
    4-8 - ≥814.2 - ≥1
    8-10 - ≥765.2 - ≥2
    The pressed bars in the state of delivery according to GOST 6511-60 (samples prodolny)
    42-120 - ≥270 ≥35 ≥25
    Bars, drawn, in the state of delivery according to GOST 6511-60, OST 4.021.023-92 (longitudinal samples)
    13-25 - ≥370 ≥18 ≥12
    26-35 - ≥330 ≥20 ≥14
    36-40 - ≥310 ≥20 ≥16
    5-12 - ≥430 ≥12 ≥10

    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
    d10 Elongation after rupture

    Physical characteristics

    Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m
    20 124 8800 84 90

    A description of the physical symbols

    Name Description
    Е The normal elasticity modulus
    r Density
    l Coefficient of thermal conductivity
    R UD. the resistivity