Alloy 06HN28MDT (ЭИ943)

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  • Alloy 06XHN28MDT (EI943)
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  • Alloy CrN40MDTU (EP543U)
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    • Designation

    Name The value
    Designation GOST Cyrillic 06ХН28МДТ
    Designation GOST Latin 06XH28MDT
    Transliteration 06HN28MDT
    By chemical elements 06CrNi28CuДTe
    Name The value
    Designation GOST Cyrillic ЭИ943
    Designation GOST Latin EI943
    Transliteration EhI943
    By chemical elements -

    Description

    Alloy 06HN28MDT is used: for the manufacture of castings of parts of metallurgical equipment; weldments, reactors, heat exchangers, pipelines, tanks, operating at temperatures up to +800 °C in sulfuric acid of different concentrations and in acidic and sulphate environments, with the exception of 55% acetic acid and phosphoric acid and other environments of increased aggressiveness; equipment for the production of complex mineral fertilizers, welding electrodes; for all connections of equipment of piping joints in the apparatus, connections, pipes, fittings etc. with the body of the device and repair of welded joints of equipment working in radioactive environments; as a cladding layer in the manufacture of hot-rolled dual-layer corrosion-resistant sheets; pipes tsentrobezhnolityh for the manufacture of the coils of the tubular furnace installations production of ammonia, hydrogen, ethylene, carbon disulphide, etc., operating in the temperature range 760−1060 °C and a pressure of 3.92 MPa (40 kgf/cm2); the welding wire SV-06XH28MDT.

    Note

    Alloy corrosion resistant high-temperature for iron-Nickel basis.

    Standards

    Name Code Standards
    Castings with special properties (iron and steel) В83 KSt 81-033:2009
    Steel pipes and fittings to them В62 GOST 11068-81, TU 1333-047-00220302-02, TU 14-3-1336-85, TU 14-3-318-75, TU 14-152-40-96, TU 1380-001-08620133-05, TU 14-158-135-2003, TU 14-3-822-79, TU 14-3-763-78, TU 14-3-822-2006
    Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006
    Sheets and strips В23 GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19903-90
    Processing of metals by pressure. Forgings В03 GOST 25054-81, TU 14-1-1530-75, ST ЦКБА 010-2004
    Sheets and strips В33 GOST 4405-75, GOST 5582-75, GOST 7350-77, GOST 10885-85, TU 14-1-3144-81, TU 14-132-175-89
    Tape В34 GOST 4986-79, TU 14-1-3941-85
    Classification, nomenclature and General rules В30 GOST 5632-72
    Bars and shapes В32 GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-1214-75, TU 14-1-2214-77
    Welding and cutting metals. Soldering, riveting В05 OST 95 10441-2002, RD РТМ 26-07-233-79, TU 14-1-1325-75, TU 14-1-1382-75
    Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004, ST ЦКБА 016-2005

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
    GOST 5632-72 ≤0.06 ≤0.02 ≤0.035 ≤0.8 22-25 ≤0.8 26-29 Rest 2.5-3.5 ≤0.2 0.5-0.9 2.5-3 ≤0.2
    KSt 81-033:2009 ≤0.06 ≤0.02 ≤0.035 ≤0.8 22-25 ≤0.8 26-29 Rest 2.5-3.5 - 0.4-0.7 2.5-3 -
    Fe is the basis.
    According to GOST 5632-72 the chemical composition is given for alloy 06ХН28МДТ.
    According to KSt 81-033: 2009 the chemical composition is given for the alloy 06ХН28МДТЛ.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % d4 d y, % KCU, kJ/m2 HB, MPa
    Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in water or air from 1050-1080 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
    ≤200 ≥216 ≥510 ≥36 - - ≥40 - ≤200
    The sheet is 12 mm. Quenching in water from 1050 °C
    - ≥270 ≥620 ≥55 - - ≥78 ≥343 -
    Rolled steel. Quenching in water from 1050 °C (indicated by the degree of deformation)
    - ≥230 ≥600 ≥23 - - ≥62 - -
    Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in water or air from 1050-1080 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
    200-500 ≥216 ≥510 ≥33 - - ≥35 - ≤200
    The sheet is 12 mm. Quenching in water from 1050 °C
    - ≥210 ≥550 ≥45 - - ≥75 ≥343 -
    Rolled steel. Quenching in water from 1050 °C (indicated by the degree of deformation)
    - ≥710 ≥750 ≥20 - - ≥42 - -
    Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Quenching in water or air at 1050-1100 °C (samples)
    0.2-2 - ≥550 - ≥25 - - - -
    The sheet is 12 mm. Quenching in water from 1050 °C
    - ≥180 ≥550 ≥50 - - ≥60 ≥343 -
    Rolled steel. Quenching in water from 1050 °C (indicated by the degree of deformation)
    - ≥750 ≥810 ≥15 - - ≥42 - -
    Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Quenching in water or air at 1050-1100 °C (samples)
    0.2 - ≥550 - ≥13 - - - -
    The sheet is 12 mm. Quenching in water from 1050 °C
    - ≥150 ≥500 ≥45 - - ≥60 ≥343 -
    Rolled steel. Quenching in water from 1050 °C (indicated by the degree of deformation)
    - ≥930 ≥950 ≥10 - - ≥40 - -
    Sheet 16 mm. Quenching in water from 1080 °C
    - ≥180 ≥250 ≥40 - - ≥45 ≥110 -
    Rolled steel. Quenching in water from 1050 °C (indicated by the degree of deformation)
    - ≥1080 ≥1100 ≥3 - - - - -
    Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in water or air from 1050-1080 °C
    - - ≥540 ≥35 - - - - -
    Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water with 950-1080 °C
    - ≥215 ≥540 ≥35 - - - - -
    Sheet 16 mm. Quenching in water from 1080 °C
    - ≥150 ≥180 ≥30 - - ≥40 ≥120 -
    Rolled steel. Quenching in water from 1050 °C (indicated by the degree of deformation)
    - - ≥1200 ≥2 - - - - -
    Forgings up to 1000 mm. Quenching in water 1050-1100 °C
    ≥216 ≥510 ≥30 - - ≥30 - -
    Sheet 16 mm. Quenching in water from 1080 °C
    - ≥90 ≥100 ≥25 - - ≥40 ≥100 -
    Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1050-1080 °C
    ≥220 ≥520 ≥25 - - ≥40 - -
    Sheet 16 mm. Quenching in water from 1080 °C
    - - ≥50 ≥35 - - ≥40 ≥100 -
    Tubular billet and pipes. Quenching in water with 950-1080 °C (in cross-section shows the thickness of the wall)
    ≥245 ≥540 ≥35 - - ≥50 ≥980 -
    0.2-22 - ≥490 ≥30 - - - - -
    The tubular billet. Quenching in water, oil or air from 1100-1150 °C
    ≥195 ≥490 ≥45 - - ≥70 - -
    Tsentrobezhnolityh pipe outer diameter 85-320 mm. Quenching in water or air from 1100-1150 °C
    ≥700 ≥800 - - ≥12 - - -

    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

    Physical characteristics

    Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C
    100 191 - 13 - 109
    200 186 - 15 - 129
    300 179 - 17 - 136
    400 171 - - - 144
    500 161 - 22 - 149
    600 156 - 24 - 153
    700 151 - 25 - 168
    800 145 - 26 - 163
    0 - 7960 13 750 -
    20 - 7960 13 750 -
    900 - - - - 163
    1100 - - - - 168

    A description of the physical symbols

    Name Description
    Е The normal elasticity modulus
    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 The alloy is welded by automatic argon arc welding with non-consumable electrode in a continuous mode, manual argon-arc welding with non-consumable electrode (filler or without filler material), combined welding methods. Allowed the use of manual arc welding with coated electrodes. To improve the overall corrosion resistance, resistance to the ICC and relieve residual stresses of the welded assemblies are subjected to hardening in air, 1050-1080 °C (aged for at least 2.5 minutes/mm of maximum wall thickness, but not less than 1 hour). Allowed for welding of the assemblies to conduct heat treatment at 950-970 °C, provided that resistance to the ICC.
    The temperature of forging Beginning - 1170 °C, the end of - 900 °C.
    Features of heat treatment Products made of alloy for maximum corrosion resistance should be subjected to the annealing regime: heating to 1050-1080 °C, exposure with wall thickness up to 15 mm - 30 min, more than 15 mm - 30 min + 1 min per 1 mm max thickness cooling in water or air. The annealing products of alloy has not been subjected to welding, stress relieving should be carried out at 950 ±10 °C for 2 h, cooling in air. Annealing of weldments from the alloy to relieve stresses should be carried out at 1050±10 °C, hold for 2 h, cooling in air.
    Surfacing For the argon arc and TIG welding of sealing and friction surfaces of parts of pipeline fittings are used electrodes and welding rods of alloy 06Х20Н10М3Д3С4Л po RD RTM 26-07-233-79. Before welding the parts must be subjected to preliminary heating in a furnace at a temperature of from 400 to +650 °C. To enhance the corrosion resistance of weld metal and relieve internal stresses after welding should be heat treatment of parts in the following mode: fit into the oven at temperatures up to +500 °C, heating from +950 to +1050 °C, exposure - 1.5 to 2 hours, cooling with the furnace.