What is the difference between Monel K500 and Monel 400?
Monel 400 alloy is a corrosion-resistant alloy with the largest consumption, the most wide range of uses and excellent comprehensive properties. The alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas media, and also has excellent corrosion resistance against hot concentrated alkali liquid. At the same time, it is resistant to corrosion by neutral solutions, water, seawater, air, organic compounds, etc. High temperature resistant and corrosion resistant alloy, widely used in seawater and other fields. An important feature of this alloy is that it generally does not produce stress corrosion cracking and has good cutting performance.
Monel 400 alloy has excellent corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid and their derivatives. At the same time, it is more corrosion-resistant than copper-based alloys in seawater. Acidic media: Monel 400 is corrosion-resistant in sulfuric acid with a concentration of less than 85%. Monel 400 is one of the few important materials that can withstand hydrofluoric acid. Water corrosion: Under most water corrosion conditions, Monel 400 alloy not only has excellent corrosion resistance, but also rarely finds pitting corrosion and stress corrosion, and the corrosion rate is less than 0.025mm/a. High-temperature corrosion: The maximum temperature of Monel 400 for continuous operation in air is generally around 600°C, and the corrosion rate in high-temperature steam is less than 0.026mm/a. ammonia:
Monel 400 is a nickel-based corrosion-resistant alloy that has been used in industry for a long time. It has good comprehensive performance and wide application. It has become an indispensable alloy due to its good corrosion resistance. Its chemical composition is mainly composed of Ni, 30% Cu and a small amount of Fe (1%-2%).
Monel K500 actually has the same corrosion resistance as Monel 400, but it has higher mechanical strength and hardness compared to 400. It also has better resistance to hot corrosion and long-term structural stability. But the plasticity is slightly less than that. Compared with Monel 400, Monel K500 contains 2.3%~3.15% aluminum AL and 0.3%~1.00% titanium Ti.
Monel K500 alloy is mostly used in the same way as 400, but if alloys other than 400 are not applicable, Monel K500 alloy is mainly used in pump shafts, impellers, conveyor scrapers, oil drill rings, strong parts, valve parts, and papermaking equipment. Scraper blades etc.
Monel K500 alloy has excellent corrosion resistance while having higher strength and hardness than Monel 400. This is due to the addition of Al, Ti and other elements to the alloy. After a certain heat treatment, there is a dispersed intermetallic compound matrix. The structure is a single-phase austenite structure, precipitated by dispersed Ni3 (Al, Ti) precipitation phases.
Monel K500 has approximately three times the yield strength and twice the tensile strength of Monel 400. Higher mechanical properties can be obtained by cold working or age hardening. Monel K500 alloy has the same corrosion resistance as Monel 400 alloy.
Monel K500 alloy is mainly used for pump shafts and impellers, conveyor scrapers, oil well drill rings, elastic parts, valve gaskets, etc. Others can also manufacture various heat exchange equipment, boiler feed water heaters, petrochemical pipelines, containers, towers, tanks, valves, pumps, reactors, shafts, etc. Due to its low corrosion rate in flowing seawater and the high strength of this alloy, Monel K500 is suitable for the manufacture of seawater-resistant centrifugal pump shafts. Suitable for static and flowing seawater.
Monel K500 offers the same corrosion resistance as Monel 400 but with greater mechanical strength and hardness. It has good resistance to hot corrosion and long-term structural stability. It is mainly used to manufacture turbine blades and gas turbine blades for aeroengines with operating temperatures below 750°C; used to manufacture fasteners and springs on ships; pump valves on chemical equipment; scrapers on papermaking equipment, etc.
Monel K500 alloy has excellent corrosion resistance while having higher strength and hardness than Monel 400. This is due to the addition of Al, Ti and other elements to the alloy. After a certain heat treatment, there is a dispersed intermetallic compound matrix. The structure is a single-phase austenite structure, precipitated by dispersed Ni3 (Al, Ti) precipitation phases. Monel K500 has approximately three times the yield strength and twice the tensile strength of Monel 400. Higher mechanical properties can be obtained by cold working or age hardening. Monel K500 alloy offers the same corrosion resistance and long-term structural stability as Monel 400 alloy.
