Material Introduction to Inconel 600

Inconel 600 alloy is a nickel-chromium-iron-based solid solution strengthened alloy, known for its excellent high-temperature corrosion resistance and oxidation resistance, superb cold and hot processing and welding properties, as well as satisfactory thermal strength and high plasticity below 700°C.

• Applications

● Thermocouple sheaths in erosive atmospheres. ● Vinyl chloride monomer production: Resistant to chlorine gas, hydrogen chloride, oxidation, and carburization corrosion. ● Conversion of uranium oxide to hexafluoride: Resistant to hydrofluoric acid corrosion. ● Production and use of corrosive alkali metals, especially in environments involving sulfides. ● Production of titanium dioxide via the chlorine method. ● Production of organic or inorganic chlorides and fluorides: Resistant to chlorine and fluorine gas corrosion. ● Nuclear reactors. ● Retorts and components in heat-treatment furnaces, especially in carburizing and nitriding atmospheres. ● In petrochemical production, the use of Alloy 600H is recommended for catalytic regenerators operating above 700°C to achieve a longer lifespan.

2. Chemical Composition

3. Equivalent Grades:

GH3600, GH600 (China)

NC15Fe (France)

W. Nr. 2.4816

NiCr15Fe (Germany)

NA14 (United Kingdom)

Inconel 600, UNS NO6600 (USA)

NiCr15Fe8 (ISO)

Standards for Inconel 600:

UNS N06600

DIN/EN 2.4816

ASTM B168

ASME SB-168

AMS 5540

NCF 600

• Welding

Inconel 600 is suitable for any traditional welding process, whether welding with similar materials or other metals. These processes include Tungsten Inert Gas (TIG) welding, Plasma Arc Welding, Submerged Arc Welding, Metal Inert Gas (MIG) welding, and Flux-Cored Arc Welding, with pulse arc welding being the preferred method. For manual arc welding, it is recommended to use a mixed shielding gas composed of Argon, Helium, Hydrogen, and Carbon Dioxide (Ar+He+H2+CO2).

The welding of Incoloy 825 must be performed in the annealed condition, and surfaces should be thoroughly cleaned with a stainless steel wire brush to remove stains, dust, and any markings. When welding at the root of the weld, great care must be taken to achieve optimal root weld quality using very high purity argon gas (99.99%) to prevent oxidation. Any discoloration in the heat-affected zone of the weld should be brushed off with a stainless steel brush before the weld area cools to remove heat tints.