I. Definition of Incoloy 903 alloy.
Incoloy 903 alloy is a nickel-based high temperature alloy with excellent high temperature strength and corrosion resistance. The alloy is a cast malleable deformed high temperature alloy and can be used in a variety of high temperature applications such as aerospace, aero-engines, gas turbines, nuclear energy, chemical industry and other fields.
II.Chemical Composition.
The chemical composition of Incoloy 903 alloy is as follows:
Element | Content (mass fraction, %)
—|—
Ni | 42.5-46.5
Fe | 27.0-30.0
Co | 10.0-12.0
Cr | 7.0-9.0
Ti | 2.5-3.5
Al | 2.0-2.8
Cu | ≤0.50
Mn | ≤0.50
Si ≤0.35
C ≤0.08
B ≤0.015
Zr ≤0.015
Production standards.
The production standards of Incoloy 903 alloy mainly include American standard AMS 5803 and European standard EN 2.4634. These standards specify the chemical composition, physical properties, mechanical properties, processing properties, heat treatment and testing requirements of Incoloy 903 alloy.
Ⅳ, corrosion resistance.
Incoloy 903 alloy has good corrosion resistance, can maintain stable performance at high temperatures and corrosive environments. The alloy can resist oxidation, reduction and complex corrosive media, such as nitric acid, sulfuric acid, hydrofluoric acid, chloride, etc.. At the same time, the alloy also has excellent resistance to thermal corrosion and fatigue crack extension performance.
V. Typical application scope.
Incoloy 903 alloy is widely used in aerospace, aviation engines, gas turbines, nuclear energy, chemical industry and other fields. Specific applications include:
1. Aerospace field: Incoloy 903 alloy is widely used in the manufacture of jet engines, rocket engines, missile engines, aviation braking systems, aviation components and so on.
2. Aero-engine field: Incoloy 903 alloy is used in the manufacture of high-temperature components in aero-engine, such as turbine discs, turbine blades, combustion chambers and so on.
3. gas turbine field: Incoloy 903 alloy is used in the manufacture of gas turbine high temperature parts, such as turbine discs, turbine blades, combustion chambers and so on.
4. nuclear energy field: Incoloy 903 alloy is used in the manufacture of nuclear reactors in the high-temperature parts, such as fuel elements, reactor shell, etc..
5. Chemical field: Incoloy 903 alloy is used in the manufacture of chemical reactors, pipelines, pumps and other equipment in the high-temperature parts, as well as high-temperature corrosive environment of chemical catalysts and so on.
VI. Processing and heat treatment.
Incoloy 903 alloy has good processing performance and malleability, can be achieved through a variety of processing and heat treatment processes to achieve different performance and shape requirements. Commonly used processing and heat treatment processes include hot working, cold working, heat treatment, machining and welding.
1. hot working: Incoloy 903 alloy can be hot extrusion, hot rolling, hot forging and other hot working processes to achieve different shape and performance requirements. When hot working, attention should be paid to control the temperature and speed to avoid excessive heating and stress.
2. Cold working: Incoloy 903 alloy can be cold extruded, cold drawn, cold rolled and other cold working processes to achieve different shape and performance requirements. When cold working, attention should be paid to controlling the deformation amount and deformation speed to avoid excessive stress and cracks.
3. Heat treatment: Incoloy 903 alloy can be adjusted to its organisational structure and properties through solution treatment, aging treatment and other heat treatment processes. When heat treatment is carried out, attention should be paid to controlling the temperature and time in order to avoid generating excessive quality and excessive stress.
4. Machining: Incoloy 903 alloy can be machined by turning, milling, drilling and other machining processes to achieve different shape and size requirements. When machining, suitable cutting tools and cutting parameters should be selected to avoid excessive heat and stress.
5. Welding: Incoloy 903 alloy can be welded by TIG welding, PLASMA welding, arc welding and other welding processes to achieve different connection and repair requirements. When welding, the welding temperature and speed should be controlled, and suitable welding materials and protective gases should be selected to avoid excessive heat and stress, and adequate pre-preparation and post-processing.
VII. Recommended Welding Materials.
Recommended welding materials for Incoloy 903 alloy include Inconel718 wire, HastelloyX wire and Incoloy 903 wire. These welding materials have good welding performance and corrosion resistance, and can meet the welding requirements of Incoloy 903 alloy.
1. Inconel 718 wire: Inconel 718 wire is a nickel-based alloy wire with good welding performance and corrosion resistance, suitable for TIG welding, PLASMA welding and arc welding of Incoloy 903 alloy and other welding processes.
2. Hastelloy X wire: HastelloyX wire is a nickel-based alloy wire, with excellent welding performance and corrosion resistance, suitable for Incoloy 903 alloy TIG welding, PLASMA welding and arc welding welding and other welding processes, especially suitable for high-temperature and high-strength environment welding.
3. Incoloy 903 wire: Incoloy 903 wire is a kind of welding wire with the same composition as Incoloy 903 alloy, with good welding performance and corrosion resistance, suitable for TIG welding, PLASMA welding and arc welding of Incoloy 903 alloy and other welding processes.
Ⅷ, the scope of available products.
The range of products available for Incoloy 903 alloy includes all kinds of forgings, plates, tubes, rods, wires, wires, profiles, pipe fittings, flanges, etc., which can be customised and produced according to customers’ requirements. Common specifications include:
1. forging: diameter ≤1000mm, height ≤2000mm, weight ≤5 tonnes.
2. Plate: thickness 0.3-50mm, width ≤2000mm, length ≤6000mm.
3. Pipe: OD 6-300mm, wall thickness 0.5-20mm, length ≤12000mm.
4. bar: diameter 6-300mm, length ≤ 6000mm.
5. wire: diameter 0.05-8mm, length ≤1000m.
6. Shaped parts: customised production according to customers’ requirements, such as forgings, plates, tubes, bars, etc.
7. Pipe fittings: elbows, tees, crosses, flanges, etc.
All the above products can be supplied with different heat treatment states, such as solid solution + aging, annealing, normalising + tempering, etc., to meet different requirements for use.
In conclusion, Incoloy 903 alloy is a nickel-based high-temperature alloy with excellent high-temperature strength and corrosion resistance, which is widely used in aerospace, aviation engines, gas turbines, nuclear energy, chemical industry and other fields. It can be processed through a variety of machining and heat treatment processes to achieve different performance and shape requirements, and it also needs to pay attention to controlling the temperature and speed in order to avoid excessive heating and excessive stress. When welding, suitable welding materials and shielding gases should be selected to avoid excessive heat and stress, and adequate pre-preparation and post-processing should be carried out.Incoloy 903 alloy is available in a wide range of products, and can be customised and produced according to customers’ requirements to meet different usage requirements.
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Post time: Jul-22-2023
