Today both Inconel and Incoloy are widely used in various spheres but still many of us don’t know the basic difference between the two. Both Inconel and Incoloy belong to the family of superalloys, also called high-performance alloys but both have their own distinct properties, and offer high resistance to corrosion and oxidation, in addition to mechanical strength at elevated temperatures.
When comparing the differences the most basic difference between them is their composition. Inconel is an alloy of nickel-chrome and usually contains over 50 percent nickel, whereas Incoloy, is an alloy of nickel-iron-chromium, and contains less than 50 percent nickel content.
Let us know more about the differences between the two alloys in detail.
Inconel
Inconel, once heated, forms a thick yet stable oxide layer that protects its outer surface from an additional attack. This makes it the perfect alternative for high temperature and pressure applications, where steel and aluminum would succumb to thermal creep. Available in various grades, the Inconel alloys exhibit shifting characteristics with slight variations in their chemistry.
In its more basic type, typical applications would include the food industry and heat treated components. Once alloyed with different elements, however, additional strengthening and stiffening allow its use in the more stringent areas of the marine, aerospace, and chemical processing industries. Alloyed to its highest performance, Inconel then becomes the choice material of in the most crucial environments of turbine blades, rocket engines, and key nuclear industry components.
Characteristics of Inconel alloys are as follows:
Good resistance to acids, such as sulfuric, phosphoric, nitric, and hydrochloric
Almost completely free from chloride-induced stress corrosion cracking
Outstanding mechanical properties at both extremely low and high temperatures
Excellent pitting, crevice corrosion, and intercrystalline corrosion resistance
High resistance to oxidation at elevated temperatures
Applications, where Inconel alloys are used, are as follows:
Chemical and petrochemical processing
Flare stacks on offshore oil platforms
Gas turbines, rocket motors/engines, and spacecraft
Pollution control equipment
Nuclear reactors
Incoloy
Incoloy, with its higher ferrous content and correspondingly lower cost, make it the ideal material in elevated temperature, but less critical, applications. A further feature is its relative ease of fabrication, employing the same machines and processes used for stainless steel.
Incoloy alloy also comes in a variety of grades, whose emphasis is more on resistance to aggressive forms of corrosion, particularly in aqueous environments. Whereas a basic form of Incoloy will find widespread general use, further alloying with enhancing elements provides added resistance to chemical and environmental corrosion, as well as physical deterioration, such as surface pitting and cracking.
Excellent resistance to seawater, brine, sour gas and high chloride environments make it a popular choice in the oil and gas industries. The most specialized Incoloy alloys, however, are widely used in the harshest chemical environments of all, involving among others, acids, wet scrubbing, nuclear fuel and the reactive atmospheres of furnaces.
Characteristics of Incoloy alloy are as follows:
Excellent strength resistance in high-temperature settings
Outstanding oxidation and carburization resistance in high-temperature settings
Good creep-rupture strength
Good corrosion resistance in aqueous environments
Ease of fabrication
Applications, where Incoloy alloys are used, are as follows:
carburizing equipment, heating-element sheathing, process piping, heat exchangers, nuclear steam-generator tubing,
heat-treating equipment, chemical and petrochemical processing, power plants, industrial furnaces,
oil, and gas well piping, nuclear fuel reprocessing, acid production, pickling equipment.
Inconel is an alloy comprised mainly of Nickel and incoloy is an iron-nickel-chromium alloy. Inconel has nickel more than incoloy.
Inconel 200
what is difference between exhaustible and inexhaustible
difference between activator and inhibitor
What is the difference between electroplating and galvanising
INCONEL® alloy 718A precipitation-hardenable nickel-chromium alloy also containingsignificant amounts of iron, niobium, and molybdenum along with lesseramounts of aluminum and titanium. It combines corrosion resistance andhigh strength with outstanding weldability including resistance topostweld cracking. The alloy has excellent creep-rupture strength attemperatures to 1300°F (700°C). Used in gas turbines, rocket motors,spacecraft, nuclear reactors, pumps, and tooling. INCONEL alloy 718SPF™ isa special version of INCONEL alloy 718, designed for superplastic forming.UNS: N07718W.Nr.: 2.4668Technical Bulletin Available at American Special Metals, Corp. http://www.americanspecialmetals.com/InconelAlloy718.html
Inconel 200
There is Only Incoloy Alloy 825. "There is not Inconel Alloy 825".Incoloy Alloy 825A nickel-iron-chromium alloy with additions of molybdenum and copper. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localized attack such as pitting and crevice corrosion. The alloy is especially resistant to sulfuric and phosphoric acids. Used for chemical processing, pollution-control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production, and pickling equipment.UNS: N08825W.Nr.: 2.4858
Nickel is not an allot but it is used in the production of various alloys such as Nichrome, monel, inconel, incoloy and others. It is implemented in the wide commercial operations due to its excellent resistance to corrosion property. Read here:
no
inconel
Low Carbon Steel Gasket, Carbon steel Gasket, 4 – 6% Chrome 1/2% Moly Gaskets, 20Cb-3(Alloy 20 Gasket), Hastelloy B2 Gasket, Hastelloy C276 Gasket, Incoloy 800 Gasket, Inconel 600 Gasket, Inconel X750 Gasket, Monel 400 Gasket, Nickel 200 Gasket, Titanium Gasket etc For more information visit - Website - gascogaskets - gasco inc
Inconel Alloy Round Bars, which is oxidation invulnerable to 1800 Degree F in outside.
INCONEL® alloy 718 A precipitation-hardenable nickel-chromium alloy also containingsignificant amounts of iron, niobium, and molybdenum along with lesseramounts of aluminum and titanium. It combines corrosion resistance andhigh strength with outstanding weldability including resistance topostweld cracking. The alloy has excellent creep-rupture strength attemperatures to 1300°F (700°C). Used in gas turbines, rocket motors,spacecraft, nuclear reactors, pumps, and tooling. INCONEL alloy 718SPF™ isa special version of INCONEL alloy 718, designed for superplastic forming.UNS: N07718W.Nr.: 2.4668Detail Information Available at: American Special Metals, Corp.at: www.AmericanSpecialMetals.comInconel Alloy 718 is a Registered Trademarks ofSpecial Metals Corporation and Its subsidiaries
yes
Inconel materials are metal alloys which generally have a high content of nickel. They often contain varying amounts of chromium, molybdenum, and iron. The amount of each metal in an inconel, as in an metal alloy, varies by the specific alloy.
INCONEL alloy 600 is readily joined by conventional welding processes. Welding materials for joining alloy 600 are INCONEL Welding Electrode 182 for shielded metal-arc welding*, INCONEL Filler Metal 82 for gas tungsten-arc and gas metal-arc welding, and INCONEL Filler Metal 82 and INCOFLUX 4 Submerged Arc Flux for the submerged-arc process. Welds made with INCONEL Welding Electrode 182 may have decreased ductility after extended exposure to temperatures of 1000° to 1400°F (540° to 760°).
I do not believe INCONEL is a ferrous material because it consists mostly of Nickel with only a small amount of Iron in its chemistry.