Alloy name/main chemical structure (wt%)

General characteristics of alloys

Application example

JIS symbol

Nickel-chromium alloy 1

< nickel 78, chromium 20, other silicon1.2 >; It is an electrothermal/resistive alloy, and its highest working temperature is about 1 100℃. High high-temperature strength, good oxidation resistance, and will not become brittle after high-temperature heating. Heating elements and resistors for industrial and household appliances

Nickel-chromium alloy 2

< nickel 58.0, chromium 16.5, iron 23.0, other silicon1.2 >; The strength and oxidation resistance at high temperature are slightly worse than that of NCH- 1, and the highest working temperature is 1000℃. Heating elements and resistors for industrial and household appliances

Heat-resistant alloy Inconel 600

< Ni 76.0, Cr 15.5 and Fe 8.0 > have good high-temperature oxidation resistance, resistance to Cl- ion stress corrosion cracking, and excellent corrosion resistance to high purity water and high alkali. Chemical/food industry production equipment, heat exchanger/heating element/parts, heat treatment fixture, reactor parts, electronic parts.

Inconel 60 1

& ltNi 60.5, Cr 23.0, Fe 14.4, other al1.4 >; It has excellent oxidation resistance at high temperature and excellent corrosion resistance at other high temperatures. It also has high mechanical properties at high temperature. Industrial heating furnace (muffle furnace, distiller, basket and other heat treatment equipment), petrochemical and other industrial manufacturing equipment, gas turbine parts NCF 60 1.

Inconel 6 17

< nickel 54.0, chromium 22.0, molybdenum 9.0, cobalt 12.5, other aluminum1.0 >; Because it is a stable alloy at high temperature, it has strong oxidation resistance and carburization resistance, and has strong fracture strength above 900 degrees. Aircraft engine parts and heat treatment parts.

Inconel 625

& ltNi 6 1.0, Cr 2 1.5, Mo 9.0, Fe 2.5, others nb+ta 3.6 >; It is a Ni-Cr-Mo alloy with high strength without heat treatment and high creep strength at high temperature. Chemical industry product manufacturing facilities, pollution control facilities, nuclear fusion reactor facilities, nuclear reactor parts, aerospace equipment parts, seawater treatment facilities NCF 625.

Inconel 690

< Ni 60.0, Cr 30.0, Fe 9.5, and the rest is Nb+Ta1.0 >; Chromium-reinforced Inconel 600 alloy has excellent corrosion resistance to oxidizing chemicals and sulfur-containing gases, pickling equipment for cooking heaters, reprocessing of nuclear fuel and equipment for melting glass.

Inconel 7 18

& ltNi 54.0, Cr 18.0, Mo 3.0, Fe 18.5, other Ti Ti 0.9, Al 0.5, nb+ta 5.1>+0 >; It is a precipitation hardening nickel alloy, which has both high temperature strength and corrosion resistance, excellent creep strength at the temperature of up to 700°c, good weldability in solid solution and is not easy to crack. Some aircraft, gas turbines, rockets, satellites, spacecraft, nuclear reactor parts, nuclear fuel washers and springs, hot extrusion tools NCF 7 18.

Cr-ni-Fe alloy X 750

< nickel 73.0, chromium 15.5, iron 7.0, other titanium 2.5, aluminum 0.7, niobium+tantalum1.0 >: It is a precipitation hardening nickel-chromium alloy, which has excellent corrosion resistance, oxidation resistance, tensile strength, creep fracture and durability, high temperature resistance of about 700℃ and corrosion resistance. Gas turbine/rocket engine parts, aircraft/nuclear reactor parts, pressure vessels, heat-resistant springs, fasteners, hot working tools.

Inconel 75 1

< nickel 72.5, chromium 15.5, iron 7.0, other titanium 2.3, aluminum 0.9, niobium+tantalum1.0 >: It has similar characteristics to Inconel X-750, especially the alloy automobile engine exhaust valve developed for exhaust valve.

Incoloy 800

& ltNi 32.5, Cr 2 1.0, Fe 46.0, other c0.04 >; Good strength and oxidation resistance, carburizing resistance at high temperature, long-term stable structure, good corrosion resistance in humid environment and excellent processability. Sheathed heater outer tube, heat exchanger, chemical and petrochemical industrial pipeline, carburizing equipment, nuclear steam generating pipe.

Incoloy 800 Superalloy (800 hours)

& ltNi 32.5, Cr 2 1.0, Fe 45.0, other C 0.08, Al+Ti1>; The basic composition is the same as I-800, but high creep strength can be ensured by carefully controlling the contents of C, Ti and Al and high temperature heat treatment. Heat exchangers/pipes/components of reaction/decomposition equipment in chemical/petrochemical industry, superheaters/heaters in thermal power plants, industrial heating furnaces and heat treatment equipment NCF 800 H.

Incoloy 802

& ltNi 32.5, Cr 2 1.0, Fe 46.0, other c0.4 >; It is an alloy, which can increase the carbon content of Inconel 800 and improve the mechanical properties at high temperature. Keywords titanium processing die, ethylene industry, pin heat treatment

Incoloy 840

< Ni 720.0, Cr 20.0, Fe 58.0 > This alloy has been developed as the outer tube of sheathed heater for household kitchen equipment, which has excellent oxidation resistance at high temperature.

Nymonic 75

& ltNi 75.0, Cr 19.5, Fe 4.0, other Ti 0.2 >；; It is an alloy gas turbine part, which has excellent mechanical properties and oxidation resistance at high temperature and is a part of heat treatment equipment.

Nai monique 80A

& ltNi76.0, Cr 19.5, other Ti 2.4, al1.4 >; It is a precipitation hardened Ni-Cr alloy with excellent corrosion resistance, oxidation resistance and creep fracture strength at high temperature of 8 15℃. Exhaust valve for onshore/offshore internal combustion engine and gas turbine components (blades, disks, disks)

Nymonic 90

& ltNi 57.5, Cr 19.5, Co 16.5, Fe 1.0, other Ti 2.5, al1.5 >; This is an alloy which can improve the creep resistance by increasing the cobalt content of Naimonic 80A. It can be used for gas turbine parts and hot working tools up to 920 degrees.

Hastelloy x alloy

< nickel 47.5, chromium 2 1.8, molybdenum 9.0, iron 18.5, cobalt 1.5, other W 0. 6> It is a solution-strengthened heat-resistant alloy with high temperature strength and oxidation resistance as high as 1200℃. Although it has high strength under the condition of solution heat treatment, it has good processability. Gas turbine parts, industrial furnace parts, heat treatment equipment, nuclear equipment

Inco HX alloy (equivalent to Hastelloy X)

< nickel 47.5, chromium 2 1.8, molybdenum 9.0, iron 18.5, cobalt 1.5, other W 0. 6> has excellent oxidation resistance and high temperature strength up to 65,438 0,200 degrees, and is used for aircraft engine parts, industrial turbine parts and industrial furnace parts.

Inco 330 (corresponding to RA 330)

& ltNi 36.0, Cr 19.0, Fe 42.0, other si1.3 >; Excellent high temperature strength and corrosion resistance, especially excellent oxidation resistance and carburization resistance. Parts of heat treatment equipment such as muffle furnace, distiller, conveyor belt and mesh belt.

The University of Hawaii (TheUniversityofHawaiiatManoa)

< Ni 42.0, Cr 33.0 and Fe 24.0 > have excellent oxidation resistance at 1000℃ or higher. Combustion nozzles with excellent sulfur corrosion and good heat resistance inspection, such as heat exchangers, diesel engines and industrial furnace parts.

Heat resistant steel SUH 660

< nickel 25.5, chromium 15.0, molybdenum10.3, iron 54, other titanium 2. 15, vanadium 0.30, boron 0.005 > although it is an austenitic precipitation hardening steel widely used as a high-strength heat-resistant steel, our goal is high-quality products. Various parts of aircraft engines and industrial turbines (blades, shafts, afterburners, springs, especially heat-resistant fasteners)

Corrosion resistant alloy Incoloy 825

& ltNi 42.0, Cr 2 1.5, Mo 2.2, Fe 30.0, Cu 2.2, other Ti 0.9 >；; Reducing and oxidizing acids (especially sulfuric acid and phosphoric acid), stress corrosion cracking, have excellent corrosion resistance to asphalt and crevice corrosion. Chemical industry, pollution control equipment, acid production equipment, pickling equipment, nuclear fuel reprocessing equipment, oil and gas oil field pipelines, marine and beach factory accessories.

Carpenter 20 Cb 3

< Ni 35.0, Cr 20.0, Mo 2.5, Fe 37.0, Cu 3.5, others Nb+Ta 0.5 >; Ni-Fe-Cr system of corroded alloy contains Cu-Mo and Nb, which has excellent corrosion resistance in general corrosion, pitting corrosion and crevice corrosion, and intergranular corrosion in solutions containing various acids. Chemical/petrochemical industrial production equipment/equipment parts (storage tanks, heat exchangers, pipes, pumps, valves).

Hastelloy -2 B

& ltNi 33.0, Cr 1.0, Mo 28.0, Fe 2.0, Co 1.0, other Si 0. 1, MH 65438 +0.0, C0.02 >; It is an alloy developed for hydrochloric acid, which can withstand the full temperature range of hydrochloric acid and reach the total concentration and boiling point. It is also suitable as a corrosion resistant material for sulfuric acid, phosphoric acid, hydrofluoric acid and acetic acid. Petrochemicals-related towers, tanks, heat exchangers and pipelines. Production equipment includes lactic acid, ammonium sulfate and sulfur dissolving tank. In addition, there are corrosion-resistant materials such as hydrochloric acid, sulfuric acid, phosphoric acid and hydrofluoric acid. Cylindrical screw for fluororesin molding.

Hastelloy C-276

& ltNi 57.0, Cr 15.5, Mo 16.0, Fe 6.0, other W 4.0, V 0.3, C0.01> It has excellent corrosion resistance and can resist all kinds of harsh corrosive environments. Good weldability, no heat treatment after welding, and good corrosion resistance of welded parts. Pollution prevention and flue gas desulfurization equipment (FGD), chemical equipment, valves and paper industry equipment, waste treatment facilities.

Hastelloy C-22

Inconel 622

< nickel 57.0, chromium 20.5, molybdenum 14.2, iron 2.3, other tungsten 3.2, vanadium 0.25, carbon 0.01>; The Ni-Cr-Mo alloy with W addition has excellent corrosion resistance and can resist any corrosion in reducing and oxidizing corrosive environments. Chemical manufacturing equipment, gas desulfurization equipment, hazardous waste incineration equipment, paper industry bleaching equipment, radioactive waste treatment equipment.

Inconel 686

< nickel 57.5, chromium 20.5, molybdenum 16.3, iron 1.0, other tungsten 3.9, carbon 0.01>; Ni-Cr-Mo alloy containing W has the best corrosion resistance in all corrosive environments. Chemical manufacturing equipment, gas denitration and desulfurization device (FGD)