Alloy PT-7M

  • 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 ПТ-7М
    Designation GOST Latin PT-7M
    Transliteration PT-7M
    By chemical elements ПTe-7Cu

    Description

    Alloy PT-7M is used: for the production of semi-finished products (sheets, strips, foils, strips, plates, bars, rods, profiles, tubes, forgings and forged blanks) by the method of deformation, and also ingots; thin-walled welded components (high ductility of the alloy allows to obtain from it particularly thin-walled tubes); various kinds of pipelines operating at room and elevated temperatures in aggressive environments; pipe items ship vacuum desalination plants; degassed titanium welding wire diameter 1,0−7,0 mm.

    Note

    The alloy has good corrosion resistance. Alloy PT-7M relates to alloyed, low-strength and high-ductility alloys of Ti-Al-Zr. It is quite easy to deform not only at high but also at room temperature, which due to the small content of aluminum.

    Standards

    Name Code Standards
    Non-ferrous metals, including rare, and their alloys В51 GOST 19807-91, TU 1-5-132-78, TU 1-5-453-78
    Steel pipes and fittings to them В62 GOST 21945-76, GOST 22897-86, TU 14-3-167-73
    Norms for calculation and design В02 OST 1 00154-74
    Welding and cutting metals. Soldering, riveting В05 TU 1-9-922-82
    Tubes of non-ferrous metals and alloys В64 TU 14-3-615-77, TU 5.961-11774-2001, TU 14-3-1819-91, TU 14-3-820-79

    Chemical composition

    Standard C Si Fe N Al Ti O Zr H
    GOST 19807-91 ≤0.1 ≤0.12 ≤0.25 ≤0.04 1.8-2.5 Rest ≤0.15 2-3 ≤0.006
    Ti is the basis.
    According to GOST 19807-91, the total content of other impurities is ≤ 0.30%. The mass fraction of hydrogen is indicated for ingots. The mass fraction of chromium and manganese should not exceed 0.15% (in total). The mass fraction of copper and nickel should not be more than 0.10% (in total), including nickel not more than 0.08%.
    For pipes of group A in accordance with GOST 21945-76, the maximum mass fraction of hydrogen in the alloy is set to 0.005%.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
    The billet according to TU 1-5-132-78. Annealing
    Образец 15х15 ≥373 470-637 ≥18 ≥36 ≥1020
    Pipe seamless cold-rolled and cold-drawn, heat-treated in the delivery condition according to GOST 22897-86 (longitudinal samples)
    - ≥372 470-666 ≥20 - -
    The billet according to TU 1-5-132-78. Annealing
    Образец 15х15 ≥176 ≥245 - - -
    Pipe seamless cold-rolled and cold-drawn, heat-treated in the delivery condition according to GOST 22897-86 (longitudinal samples)
    - - ≥235 - - -
    The metal tube elements of ship vacuum desalination plants on the EAST 5.4141-75
    ≥372 470-666 ≥20 - -
    Wire welding degassed on the other 1-9-922-82
    1.0; 1.2 - 441-637 ≥16 - -
    1.4-7 - 441-588 ≥20 - -
    Rolled steel in delivery condition (longitudinal samples)
    1-2 450-600 500-650 ≥30 - ≥980
    380-550 480-680 15-25 ≥40 ≥880
    Pipe the seamless hot-rolled, heat-treated in the delivery condition according to GOST 21945-76
    ≥372 470-686 ≥18 ≥36 ≥780

    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
    y The relative narrowing
    KCU Toughness

    Physical characteristics

    Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C С, J/(kg · °C)
    20 112 4490 - 1080 - -
    100 - - 93 1270 88 -
    200 - - 105 1400 89 625
    300 - - 119 1520 92 659
    400 - - 133 - 94 69

    A description of the physical symbols

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

    Technological properties

    Name The value
    Weldability without restrictions