Alloy OT4

  • Alloy VT8M-1
  • Alloy VT32
  • Alloy VT35
  • Alloy VT4
  • Alloy VT41
  • Alloy VT5
  • Alloy VT5-1
  • Alloy VT6 (VT6sv.)
  • Alloy VT6C
  • Alloy VT6h
  • Alloy VT8
  • Alloy VT8-1
  • Alloy VT3-1
  • Alloy VT9
  • OT4 alloy
  • Alloy OT4-0
  • Alloy OT4-1
  • Alloy OT4-2
  • Alloy PT-1M
  • Alloy PT-3B
  • Alloy PT-7M
  • Alloy SPT-2
  • Alloy TC5
  • Alloy TC6
  • Alloy VT15
  • Alloy 14
  • Alloy 19
  • Alloy 27
  • Alloy 2B
  • Alloy 37
  • Alloy 3M
  • Alloy 40
  • Alloy 5B
  • Alloy AT3
  • Alloy AT6
  • Alloy VT14
  • Alloy VT25U
  • Alloy VT16
  • Alloy VT18
  • Alloy VT18U
  • Alloy VT2 (VT2sv.)
  • Alloy VT20
  • Alloy VT20-1 (VT20-1sv.)
  • Alloy VT20-2 (VT20-2sv.)
  • Alloy VT22
  • Alloy VT22I
  • Alloy VT23

    • Designation

    Name The value
    Designation GOST Cyrillic ОТ4
    Designation GOST Latin OT4
    Transliteration OT4
    By chemical elements SnTe4

    Description

    The OT4 alloy used: for the manufacture of semi-finished products (sheets, strips, foils, strips, plates, bars, rods, profiles, tubes, forgings and forged blanks) by the strain, and bars; parts, long operating at a temperature of 350−400 °C (at temperatures up to +350 °C for 2000 h and up to +300 °C 30 000 h); welding wire diameter: 1.0−7.0 mm.

    Note

    Titanium alloy with good corrosion resistance.
    A pseudo-alloy OT4 refers to the system Ti-Al-MP, as the alloy OT4−1, but differs in the high content of aluminum. In this regard, it is stronger alloy OT4−1. This alloy has average strength. However, the alloy OT4 less plastic and technologically advanced than the alloy OT4−1. Alloy well deformed in a hot, sparingly in cold conditions.
    The basic operations of sheet metal forming (drawing, bending, flanging) are carried out in cold condition. When stamping of complex configuration parts require heating.
    The alloy has good thermal stability. Alloy is not thermally hardened, the only form of heat treatment which it is subject, is complete or incomplete (to remove residual stresses) annealing. Full annealing is carried out at 660−710 °C (sheet semifinished products and parts of them) and when 740−790 °C (bars, forgings, stamping, etc., and parts of them); incomplete annealing — when 545−585 °C.

    Standards

    Name Code Standards
    Non-ferrous metals, including rare, and their alloys В51 GOST 19807-91, OST 1 90000-70, OST 1 90013-81, OST 1 90002-86
    Steel pipes and fittings to them В62 GOST 21945-76, GOST 22897-86
    Sheets and strips В53 GOST 22178-76, GOST 23755-79, OST 1 90218-76, OST 1 90024-94, TU 1-5-106-82, TU 1-92-41-76
    Bars В55 GOST 26492-85, OST 1 92020-82, OST 1 90266-86, OST 1 90173-75, OST 1 90107-73, OST 1 90006-86
    Welding and cutting metals. Soldering, riveting В05 OST 1 90015-77
    Tubes of non-ferrous metals and alloys В64 OST 1 90050-72, OST 1 90050-92, TU 1-5-127-73
    Bars and shapes В52 OST 1 92039-75, OST 1 92051-76, OST 1 92064-77, OST 1 90102-73, OST 1 90310-81, OST 1 90317-82, OST 1 90322-82, OST 1 90326-82, TU 1-6-766-76
    Processing of metals by pressure. Forgings В03 ST ЦКБА 010-2004

    Chemical composition

    Standard C Mn Si Fe N Al Ti O Zr H
    GOST 19807-91 ≤0.1 0.8-2 ≤0.12 ≤0.3 ≤0.05 3.5-5 Rest ≤0.15 ≤0.3 ≤0.012
    OST 1 90015-77 ≤0.1 0.8-2 ≤0.12 ≤0.3 ≤0.05 3.5-5 Rest ≤0.15 ≤0.3 ≤0.006
    Ti is the basis.
    According to GOST 19807-91 and OST 1 90013-81 the total content of other impurities is ≤ 0.30%. The mass fraction of hydrogen is indicated for ingots. The mass fraction of copper and nickel should not be more than 0.10% (in total), including nickel not more than 0.08%.
    According to OST 1 90015-77, the chemical composition is given for an alloy of a welding wire with a reduced hydrogen content.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % d y, % KCU, kJ/m2 HB, MPa HRC
    Ring welded at OST 1 90317-82
    5-20 - 690-880 ≥12 - - - - -
    Sheet metal in delivery condition (the samples across the direction of rolling)
    - - ≥422 - - - - - -
    Ring welded at OST 1 90317-82
    5-20 - 620-880 ≥9 - - - - -
    Sheet metal in delivery condition (the samples across the direction of rolling)
    - - ≥392 - - - - - -
    Ring welded at OST 1 90326-82
    5-20 - 690-880 ≥12 - - - - -
    5-20 - 620-880 ≥6 - - - - -
    Sheet metal in delivery condition after annealing (samples across the direction of rolling)
    0.5-1 - 685-885 ≥20 - - - - -
    1-1.8 - 685-885 ≥15 - - - - -
    1.8-10.5 - 685-885 ≥12 - - - - -
    The blades of aircraft engines is made by forging after annealing (compact (M) - the projected area cm2 20-250, medium (C) - 250-550 cm2, bulk (K) - 550-1500 cm 2)
    М, С, К - 685-885 ≥10 - ≥30 ≥392 229-302 24-35
    Plate in the delivery condition according to GOST 23755-79. Without heat treatment (samples transverse)
    11-20 - 685-885 - ≥8 ≥15 - - -
    20-60 - 685-885 - ≥7 ≥13 - - -
    60-150 - 685-885 - ≥6 ≥10 - - -
    Plate on OST 1 90024-94 in the delivery condition. Samples heat-treated (transverse)
    20-60 - 685-885 - ≥7 ≥20 ≥343 - -
    60-150 - 685-885 - ≥6 ≥20 ≥343 - -
    11-20 - 685-885 - ≥8 ≥20 ≥343 - -
    Forgings weighing up to 200 kg after annealing
    101-250 - 638-883 ≥8.5 - ≥20 ≥343 207-285 -
    100 - 687-883 ≥10 - ≥30 ≥343 207-285 -
    The welding wire in degassed and etched condition delivery
    1-1.4 - ≤834 - ≥7 - - - -
    1.4-3 - ≤834 - ≥9 - - - -
    3-7 - ≤834 - ≥10.5 - - - -
    Bars hot rolled autogenie ordinary quality GOST 26492-85 (longitudinal samples)
    10-12 - ≥685 ≥8 - ≥25 - - -
    100-150 - ≥635 ≥8 - ≥20 ≥343 - -
    12-100 - ≥685 ≥8 - ≥25 ≥392 - -
    Bars hot rolled autogenie high-quality according to GOST 26492-85 (longitudinal samples)
    10-12 - 685-885 ≥11 - ≥30 - - -
    100-150 - 635-885 ≥9 - ≥21 ≥343 - -
    12-60 - 685-885 ≥11 - ≥30 ≥392 - -
    60-100 - 685-885 ≥10 - ≥30 ≥392 - -
    Bars and rods, hot-rolled. Annealing
    ≥110 - 655-885 ≥9 - ≥22 ≥392 207-285 -
    65-100 - 685-885 ≥10 - ≥30 ≥392 207-285 -
    10-60 - 687-883 ≥11 - ≥30 ≥392 207-285 -
    Forged square bars and round after annealing
    140-250 - 638-883 ≥8.5 - ≥20 ≥343 207-285 -
    - 657-883 ≥10 - ≥25 ≥392 207-285 -
    The pressed bars for OST 1 92020-82. Annealing. The longitudinal samples
    100 - 686-883 - ≥11 ≥30 ≥392 - -
    The tubular billet. Annealing
    - 686-883 ≥10 - ≥30 ≥343 - -
    Pipe the seamless hot-rolled, heat-treated in the delivery condition according to GOST 21945-76
    ≥637 686-882 ≥10 - ≥30 ≥340 - -
    Pipe seamless cold-rolled and cold-drawn, heat-treated in the delivery condition according to GOST 22897-86
    - 686-833 ≥10 - - - - -
    Pipe autogenie with etched surface and rolled, drawn, with outer diameter of 6.0-mm 62,0
    - 700-850 ≥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
    d Elongation after rupture
    y The relative narrowing
    KCU Toughness
    HB Brinell hardness number
    HRC Rockwell hardness (indenter diamond spheroconical)

    Technological properties

    Name The value
    Weldability Without restrictions. Alloy OT4 well TIG welded, the contact (point, roller, butt) and electron beam welding.