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Alloy 600/600 H

ASME B168, EN 2.4856, INCONEL 625

Forms

Applications

Alloy 600/600 H Applications

Typical applications for Alloy 600 and 600 H are:

  • Transport rollers, steel pipes, ventilators and other installations in industrial furnaces.
  • Industrial furnace muffles, in particular for heat treatment in N2 atmospheres.
  • Thermal element protective conduits in nitriding and carburizing atmospheres.
  • Pipes for dichloroethylene pyrolysis.
  • Components in the production of uranium tetrafluoride from hydrofluoric acid.
  • Production of caustic alkalis, especially with the presence of sulphur bonds.
  • Reaction vessels and heat exchanger pipes in the production of vinyl chloride.
  • Plant parts for the production of chlorinated and fluorinated hydrocarbons.
  • Parts such as cladding tubes for control rods, reactor tanks and seals, steam dryers and separators in boiling
    water reactors.
  • Pipes in TiCl4 evaporators in the production of TiO2.
  • For the automotive industry the alloy is used for high temperature sensors, rupture discs in airbag systems,
    electrodes for spark plugs and gaskets.
  • Vessels and piping used to contain caustic solutions.

Alloy 600 and the solution-annealed variant 600 H are nickel-chromium-iron alloys.

They are characterized by:

  • Good resistance against oxidation, carbonization and nitriding
  • Good resistance to stress corrosion in room and increased temperatures.
  • Good resistance against dry chlorine and hydrogen chloride.
  • Good mechanical properties at both low and high temperatures.
Alloy 600/600 H Plate Standards
Rod,Bar 17752
17742
10095 B 166
564
SB 166
SB 564
Sheet,Plate 17750
17742
10095 B 168 SB 168
Strip 17742 10095 B 168 SB 168
Alloy 600/600 H Designations
EN 2.4816 – NiCr15Fe
ISO NiCr15Fe8
UNS N0660
AFNOR NC15Fe
Alloy 600/600 H Chemical Composition
Min 6.0 14.0 Bal.. 0.05 - - - - - - -
Max 10.0 17.0 Bal.. 0.15 0.015 1.0 0.5 0.3 0.5 0.02 0.3
Alloy 600/600 H Physical Properties
8.5 g/cm3 at 20 ℃ (531 lb/ft3 at 68 ℉) 1,370 - 1,425 ℃(2,500 - 2,600 ℉) 1.005 (Maximum)
Specific Heat 455/0.109 495/0.118 508/0.121 550/0.131 620/0.148 635/0.152
Thermal Conductivity 14.8/102.7 17.0/117.9 18.4/127.7 22.0/152.6 27.5/190.8 31.2/216.5
Electrical Resistivity 103 106 107 111 112 114
Modulus Of Elasticity 214/31.0 205/29.7 200/29.0 187/27.1 163/23.6 143/20.7
Co-efficient of Thermal Expansion -/- 14.1/7.83 14.4/8.0 15.1/8.39 16.1/8.94 16.9/9.39
Alloy 600/600 H Mechanical Properties
Yield Strength
MPa/ksi
200/29.9 165/23.9 155/22.5 145/21.0
Tensile Strength
MPa/ksi
550/79.8 500/72.5 485/70.3 475/68.9
Elongation
%
30 - - -
Yield Strength
MPa/ksi
180/26.1 160/23.2 150/21.8 145/21.0
Tensile Strength
MPa/ksi
500-700/72.5-102 460/66.7 445/64.5 435/63.1
Elongation
%
35 - - -

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WELDING

Welding Alloy 600/600 H

Alloy 600 and Alloy 600 H can be welded using the customary and conventional arc techniques such as TIG
or MIG impulse technology. The material should be in its annealed condition for welding. A low heat input and fast heat
removal must be ensured. The maximum interpass temperature should be between 100 and 150 °C (212 and 302 °F).
Usually neither pre-heating nor a subsequent heat treatment is necessary.

The generally applicable safety recommendations, especially for avoiding dust and smoke exposure must be observed.

For TIG and MIG welding, a welding filler of the type:
  • FM 82
  • material no. 2.4806
  • ISO 18274 – S Ni 6082 (NiCr20Mn3Nb)