Alloy N70MFV (ЭП814А)

  • Alloy H60MFL
  • Alloy H65D29YuT (K-Monel)
  • Alloy H65M (EP982)
  • Alloy H65MFL
  • Alloy H70MFV (EP814A)
  • Alloy KhN50MD (EP963)
  • Alloy KhN58V (EP795)
  • Alloy CrN63MB (EP758U; CrN60MB)
  • Alloy CrN65MV (EP567)
  • Alloy CrN65MVU (EP760)
  • Alloy KhN68BMYUVC (LZh-1)

    • Designation

    Name The value
    Designation GOST Cyrillic Н70МФВ
    Designation GOST Latin H70MFB
    Transliteration N70MFV
    By chemical elements Ni70CuPВ
    Name The value
    Designation GOST Cyrillic ЭП814А
    Designation GOST Latin EP814A
    Transliteration EhP814A
    By chemical elements -

    Description

    Alloy N70MFV used: for the manufacture of welded structures operating at high temperature in hydrochloric, sulfuric, phosphoric acid and other environments are restorative in nature; parts and accessories for the chemical industry; for repair of welded joints of parts and units operating in radioactive environments; as a cladding layer in the manufacture of hot-rolled dual-layer corrosion-resistant sheets.

    Note

    Corrosion resistant alloy on a Nickel basis.
    The alloy is resistant to intergranular corrosion in aggressive environment of reduction.

    Standards

    Name Code Standards
    Sheets and strips В33 GOST 10885-85, GOST 24982-81, TU 14-1-4684-89
    Classification, nomenclature and General rules В30 GOST 5632-72
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-1214-75
    Welding and cutting metals. Soldering, riveting В05 OST 95 10441-2002
    Test methods. Packing. Marking В09 RD 24.200.15-90
    Thermal and thermochemical treatment of metals В04 ST ЦКБА 016-2005
    Tape В34 TU 14-1-4253-87
    Bars and shapes В32 TU 14-11-245-88
    Steel pipes and fittings to them В62 TU 14-3-1227-83

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
    TU 14-1-4684-89 ≤0.02 ≤0.02 ≤0.025 ≤0.5 ≤0.3 ≤0.1 Rest ≤0.5 - 1.4-1.7 ≤0.15 25-27 0.1-0.45
    GOST 5632-72 ≤0.02 ≤0.012 ≤0.015 ≤0.5 ≤0.3 ≤0.1 Rest ≤0.8 ≤0.3 1.4-1.7 ≤0.15 25-27 0.1-0.45
    Ni is the basis.
    According to GOST 5632-72, the chemical composition is given for the alloy N70MFB.
    According to TU 14-1-4684-89, the chemical composition is given for the alloy N70MFB-VI (EP814A-VI) H70MFB-ID (ED814A-ID). Deviations in the finished sheet are allowed according to the chemical composition: by tungsten ± 0.050%, by iron + 0.50%, by molybdenum + 0.50%, by carbon +0.010%, by silicon +0.050%. The calculated content of modifiers and deoxidizers (magnesium, cerium and aluminum) is established by the supplier's technological instructions and their residual content in the metal is not determined by chemical analysis.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % HB, MPa
    Blank pieces of pipe fittings according to ST CKBA 016-2005: Quenching in water from 1100-1120 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
    ≤60 ≥343 ≥784 ≥30 180-230
    Steel hot-rolled sheet (4.0 to 11.0 mm) in the delivery state according to GOST 24982-81. Quenching in water, under a water shower or air 1050-1090 °C
    4-11 ≥365 ≥780 ≥40 -
    Steel hot-rolled sheet in the delivery condition on the other 14-1-4684-89. Quenching in water from 1070-1090 °C (heating 5 minutes per 1 mm thickness)
    4.5-10 ≥365 ≥780 ≥40 -

    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
    HB Brinell hardness number

    Technological properties

    Name The value
    Weldability Manual argon arc welding with non-consumable electrode (filler or without filler material), combination welding methods, the allowable use of manual arc welding with coated electrodes.