Nimonic is a Nickel-Chromium-Cobalt based alloy that is strengthened by additions of titanium and aluminium. This high-performance alloy was specifically developed for use in applications requiring excellent creep resistance and service at temperatures up to 920°C (1688°F). Its superior strength and ductility have made Nimonic an ideal choice for components such as turbine blades, discs, forgings, ring sections, and hot-working tools. Nimonic also provides excellent weldability and machinability compared to other alloys in its class. It can be used in applications where reliability and consistent performance under extreme conditions are required. In addition, it offers good oxidation resistance, making it perfect for components that may be exposed to high temperatures over extended periods of time. With its combination of strength and corrosion resistance, Nimonic is a trusted alloy among manufacturers across many industries.
Principal Features
Nimonic is known for its exceptional performance under extreme conditions and is perfect for components that require consistent reliability. Its oxidation resistance allows it to be used in applications where temperatures may be subject to high levels for extended periods. Additionally, Nimonic has superior strength, ductility, weldability, and machinability compared to other all
Chemical Composition
Nimonic has a chemical composition composed mainly of nickel, chromium, and cobalt, with small additions of titanium and aluminium for additional strength. The primary alloying elements in Nimonic are nickel (62-71%), chromium (18-21%), cobalt (2-4%) and titanium (1-2%). Smaller
Application
Nimonic is widely used in the aerospace, automotive and energy sectors due to its superior strength and ductility. Its oxidation resistance makes it an ideal choice for components that may be exposed to high temperatures over extended periods without degradation. In the aerospace industry, Nimonic is often used in turbine blades, discs and hot-working tools
Physical Properties
Nimonic has several physical properties that make it an ideal choice for components used in extreme conditions. It has a high specific gravity of 8.8g/cm3, making it a relatively dense alloy compared to other alloys in its class. Nimonic also has excellent thermal conductivity, with a value of 63.2W/mK, allowing it to effectively dissipate heat during operation at elevated temperatures. Its elongation range is typically around 20-35%, providing the alloy with good ductility which is important for components subject to bending or twisting while in service. Additionally, nimonic exhibits excellent resistance to fatigue and impact damage due to its tensile strength of 950MPa at room temperature and 850MPa at elevated temperatures up to 920°C (1688°F). Nimonic’s exceptional strength makes it an ideal choice for components used in high-stress applications where reliable performance under extreme conditions is required.
Heat Treatment
Nimonic heat treatment involves a series of processes designed to achieve specific properties in the alloy. This is usually done through an ageing process, which involves exposing Nimonic to temperatures between 500-850°C (932-1562°F) for two hours and then slowly cooling it over 24 hours. This causes the alloy’s components to precipitate into a lattice structure, which results in increased strength and ductility with less susceptibility to stress corrosion cracking. Heat treatment can also be used for further age hardening, where Nimonic is exposed to temperatures as high as 950°C (1742°F). This allows Nimonic to be used in applications where high strength and durability are needed. Additionally, Nimonic can be solution treated by heating it to 1020°C (1868°F) and quenching it rapidly to achieve improved machinability and weldability. Heat treatment allows Nimonic to maximize its potential performance when used under extreme conditions while maintaining reliability and consistent performance.
Fatigue Properties
Nimonic’s fatigue properties make it an ideal choice for components that must be able to withstand constant cyclic stress. Its fatigue strength at 10 million cycles is approximately 680 MPa, making it one of the strongest alloys in its class. Additionally, Nimonic exhibits good resistance to corrosion fatigue, which is important for applications exposed to
Resistance to Stress Corrosion Cracking
Nimonic is highly resistant to stress corrosion cracking (SCC), which is when a material experiences crack formation or growth due to the presence of both tensile stress and a corrosive environment. Nimonic has excellent resistance to SCC due to its high chromium content, which helps form an adherent chromium oxide film on the alloy surface that prevents the further attack. Additionally, nimonic’s unique composition helps it resist aggressive environments such as those containing chlorides or sulfides. The alloy also has good oxidation resistance, which can help prevent the formation of cracks that are initiated by an oxidizing atmosphere. This makes Nimonic an ideal choice for components used in corrosive environments where reliable performance under extreme conditions is required.
Corrosion Resistance of Welds
Nimonic is highly resistant to corrosion, making it an ideal choice for components which are welded together and which must maintain their integrity in corrosive environments. This excellent corrosion resistance is due to nimonic’s high chromium content, which helps form an adherent chromium oxide film on the alloy surface that prevents the further attack.
Tensile Strength and Elongation
Nimonic is an alloy that is widely used for components in high-stress applications and corrosion environments. Its tensile strength of 950MPa at room temperature and 850MPa at elevated temperatures up to 920°C (1688°F) make Nimonic one of the strongest alloys in its class.
Hardness
Nimonic is an exceptionally hard alloy, with a hardness of 38-45 HRC depending on the specific grade. This makes Nimonic an ideal choice for applications where extreme wear resistance and durability are required. Additionally, nimonic’s hardness remains relatively consistent even at elevated temperatures, making it suitable for use in high-temperature applications
Welding and Fabrication
Nimonic is an alloy that is well-suited for welding and fabrication due to its excellent tensile strength and corrosion resistance. Nimonic can be welded using a variety of techniques such as gas tungsten arc welding (GTAW) or shielded metal arc welding (SMAW). It is important to use welding procedures that provide adequate heat input and ensure wetting of the nimonic material during the welding process. When Nimonic is welded, it is important to preheat the material to reduce thermal stresses caused by rapid cooling after welding. Post-weld heat treatments may also be necessary to achieve improved mechanical properties.
Fabrication of Nimonic components can be done by cold working, hot working or machining. Cold-working Nimonic will help improve its strength, ductility and fatigue resistance. Hot-working Nimonic can also be used to create complex shapes with improved mechanical properties. Machining Nimonic components can produce precise tolerances and shapes with minimal burrs or defects in the finished part.
Due to Nimonic’s excellent wear resistance, hardness and corrosion resistance, it has become a popular choice for many applications requiring reliable performance under extreme conditions. Its unique composition makes Nimonic an ideal choice for components which are exposed to temperatures up to 920°C (1688°F) as well as corrosive environments where stress corrosion cracking must be avoided. With proper welding and fabrication processes, Nimonic components can provide reliable performance in even the most demanding applications.
Impact Strength
Nimonic’s excellent impact strength is one of its biggest advantages over other alloys. It has a very high toughness-to-strength ratio, which makes it more resistant to fractures and failure under dynamic loading conditions. The alloy also has excellent fatigue resistance, meaning that Nimonic components can remain functional for longer periods in environments where vibration or cyclic loading is present. Furthermore, Nimonic has a high resistance to stress corrosion cracking (SCC), making it an ideal material for components which may be exposed to both mechanical and environmental stresses. The combination of Nimonic’s superior impact strength with its excellent wear resistance, corrosion resistance and fatigue resistance make Nimonic an ideal choice for many demanding applications.
What is NIMONIC used for?
Nimonic is a highly versatile material with applications in many industries. In the aerospace industry, Nimonic is used to create turbine blades and other engine parts which are exposed to extreme temperatures during flight. In the automotive industry, Nimonic components are used in exhaust systems, suspension components, and transmission components due to their excellent wear resistance
What is NIMONIC material?
Nimonic is a nickel-chromium-cobalt base alloy that is strengthened by additions of titanium and aluminium. It exhibits excellent strength and wear resistance, as well as high hardness values ranging from 38-45 HRC depending on the specific grade. Additionally, Nimonic has a remarkable resistance to corrosion and stress corrosion cracking, making
Is A NIMONIC Magnetic?
Nimonic is not a magnetic alloy as it does not contain any ferrous elements. The non-magnetic nature of Nimonic is beneficial in many applications such as electrical components and devices where magnetic interference needs to be eliminated. Additionally, nimonic’s non-magnetic properties make it suitable for use in applications where high temperatures are present, such as turbines and combustion engines, as the alloy will not be affected by the heat generated. Even when Nimonic is exposed to extreme temperatures, its non-magnetic properties remain intact. This makes Nimonic an ideal material for use in high-temperature applications that require a corrosion-resistant and wear-resistant material which also has excellent strength characteristics.
What is NIMONIC 90 equivalent to?
Nimonic 90 is a nickel-chromium-cobalt alloy that features enhanced creep resistance. This particular grade of Nimonic contains additions of titanium, aluminium and other trace elements for improved mechanical properties. It also contains molybdenum which allows Nimonic 90 to retain its high-strength properties even at elevated temperatures. The alloy has an operating temperature range of up to 920°C (1688°F). Nimonic 90 is often used in applications requiring fatigue strengths and good creep resistance, such as turbine blades and exhaust systems. The alloy’s high strength characteristics make it an excellent choice for components exposed to extreme temperatures or vibration. In addition to its superior mechanical properties, nimonic 90 also offers excellent corrosion and wear resistance making it suitable for use in corrosive environments where stress corrosion cracking must be avoided.
What is the NIMONIC series of alloys?
The NIMONIC series of alloys are a family of nickel-chromium-cobalt base alloys that are designed to provide superior strength and wear resistance. This family of alloys contains various compositions, featuring different combinations of elements such as titanium, aluminium, molybdenum, and other trace elements to achieve the desired properties. The NIMONIC series offers excellent erosion, corrosion and fatigue resistance while maintaining high ductility and impact strength at elevated temperatures up to 920°C (1688°F). It is often used in applications requiring superior creep resistance such as turbine blades and combustion engine parts. Additionally, its superior metallurgical stability ensures its long-term performance even when exposed to extreme temperatures or vibration. Overall, the NIMONIC series of alloys makes an ideal choice for components which need to stand up to harsh environments and demanding mechanical stresses.
What is the application of NIMONIC alloy?
NIMONIC alloy is widely used in a variety of applications due to its excellent strength, wear resistance and high-temperature capabilities. This includes turbine blades, discs, forgings, ring sections, hot-working tools, electrical components and devices, exhaust systems and transmission components. Its superior metallurgical stability ensures that it can withstand extreme temperatures or vibrations without any negative effects. Additionally, Nimonic has remarkable resistance to corrosion and stress corrosion cracking making it ideal for applications where these properties are needed. It is also widely used for wear-resistant parts such as bearing races and cams due to its superior wear characteristics. Furthermore, nimonic’s excellent fatigue strengths make it suitable for use in components which will be exposed to cyclic loads or alternating stresses. Overall nimonic is an ideal material when high performance and long-term reliability are desired.
What is the difference between NIMONIC 80 and 90?
NIMONIC 80 and NIMONIC 90 are both nickel-chromium-cobalt base alloys with enhanced creep resistance. The main difference between them lies in their composition. NIMONIC 80 consists mainly of nickel, chromium and cobalt, while NIMONIC 90 also includes titanium, aluminium and other trace elements. These additional elements give nimonic 90 superior mechanical properties and higher temperature capabilities which nimonic 80 does not possess. Additionally, nimonic 90 has a higher molybdenum content which allows it to retain its high strength characteristics even at elevated temperatures. Furthermore, nimonic 90 offers superior erosion, corrosion and fatigue resistance when compared to nimonic 80. Ultimately, the choice between nimonic 80 and nimonic 90 depends on the application requirements; if high temperatures or extreme wear is expected then nimonic 90 is usually recommended due to its superior properties.
Available Products and Specifications
NIMONIC alloy 90 is designated as UNS N07090 and Werkstoff Number 2.4632. Standard product forms are sheet, strip, plate, round bar, flat bar, forging stock, wire and extruded section. Rod, Bar, Wire and Forging Stock – BS HR2, HR501, HR502 and HR503; SAE AMS 5829; AECMA PrEN 2295, 2296, 2297, 2400, 2401, 2669 and 2670. Plate, Sheet and Strip- BS HR202, AECMA PrEN 2298. Pipe and Tube – BS HR402, AECMA PrEn 2299.
