| Monel 400(UNS N04400/W.Nr.2.4360) | |||||||||||||||
| Chemical Composition Wt.% | Alloy | % | Ni | Cu | Fe | C | Mn | Si | P | ||||||
| Monel 400 | MIN | 63 | 28 | – | – | – | – | – | |||||||
| MAX | – | 34 | 2.5 | 0.3 | 2 | 0.5 | 0.024 | ||||||||
| Physical Constants | Density g/cm³ | 8.83 | Melting Point ℃ | 1300-1390 | |||||||||||
| Minimum Mechanical Properties at Room Temperature | Typical Mechanical Properties | Test Temp Test ℃ | Tensile Strength Rm N/mm2 | Yield Strength RP0.2N/mm2 | Elongation A5% | ||||||||||
| Solution Treated | Room Temp | 480 | 170 | 35 | |||||||||||
| Characters | Monel 400 is a corrosion-resistant alloy characterized by its extensive consumption, versatile applications, and excellent comprehensive properties. This alloy exhibits superior corrosion resistance in hydrofluoric acid and fluorine gas media, as well as outstanding resistance to hot concentrated alkaline solutions. It is also resistant to corrosion from neutral solutions, water, seawater, the atmosphere, and organic compounds. A significant feature of this alloy is its general immunity to stress corrosion cracking, along with its good machinability. | ||||||||||||||
| Corrosion Resistance | Monel 400 alloy exhibits exceptional corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid, and their derivatives. Meanwhile, it is more resistant to corrosion in seawater compared to copper-based alloys. Monel 400 remains corrosion-resistant in sulfuric acid at concentrations below 85%. It is one of the very few critical materials capable of withstanding hydrofluoric acid. Water Corrosion: In most water corrosion scenarios, Monel 400 alloy not only demonstrates excellent resistance but also rarely suffers from pitting or stress corrosion; its corrosion rate is less than 0.025 mm/a. High-Temperature Corrosion: The maximum temperature for continuous operation of Monel 400 in air is generally around 600°C. In high-temperature steam, the corrosion rate is less than 0.026 mm/a. Due to its high nickel content, Monel 400 alloy can withstand corrosion under anhydrous ammonia and ammoniation conditions at temperatures below 585°C. | ||||||||||||||
| Applications | Applications: Monel 4oo alloy is a versatile material applicable across numerous industrial sectors: 1. Seamless water and steam pipes for power plants. 2. Seawater heat exchangers and evaporators. 3. Sulfuric acid and hydrochloric acid environments. 4. Crude oil distillation. 5. Pump shafts and propellers for equipment used in seawater. 6. Equipment for uranium extraction and isotope separation in the nuclear industry. 7. Pumps and valves used in the manufacture of hydrochloric acid production equipment. | ||||||||||||||
| Monel k-500(UNS N05500) | ||||||||||||||||
| Chemical Composition Wt.% | Alloy | % | Ni | Cu | Al | Ti | Fe | Mn | S | C | Si | |||||
| Monel 500 | MIN | 63 | 27.0 | 2.30 | 0.35 | |||||||||||
| MAX | 33.0 | 3.15 | 0.85 | 2.0 | 1.5 | 0.01 | 0.08 | 0.5 | ||||||||
| Physical Constants | Density g/cm³ | 8.05 | Melting Point ℃ | 1288-1343 | ||||||||||||
| Minimum Mechanical Properties at Room Temperature | Typical Mechanical Properties | Test Temp Test ℃ | Tensile Strength Rm N/mm2 | Yield Strength RP0.2N/mm2 | Elongation A5% | |||||||||||
| Solution Treated | Room Temp | 1100 | 790 | 20 | ||||||||||||
| Characters | Monel K500, also known as UNS N05500, offers the same excellent corrosion resistance as Alloy 400 but possesses significantly higher mechanical strength and hardness. It also features superior hot corrosion resistance and long-term microstructural stability. | |||||||||||||||
| Microstrycture | The microstructure of Monel K500 alloy consists of a high-strength, single-phase solid solution. | |||||||||||||||
| Corrosion Resistance | Monel K-500 alloy exhibits exceptional corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid, and their derivatives. It also demonstrates superior corrosion resistance in seawater compared to copper-based alloys. Acid Resistance: Monel K-500 remains corrosion-resistant in sulfuric acid at concentrations below 85%. It is one of the few critical materials capable of resisting hydrofluoric acid. Water Corrosion: In most water corrosion environments, Monel K-500 not only shows excellent resistance but is also rarely prone to pitting or stress corrosion cracking (SCC), with a corrosion rate of less than 0.025 mm/a. High-Temperature Corrosion: The maximum continuous operating temperature for Monel K-500 in air is typically around 600°C. In high-temperature steam, the corrosion rate remains below 0.026 mm/a. Ammonia Resistance: Due to its high nickel content, Monel K-500 can withstand corrosion in anhydrous ammonia and ammoniating conditions at temperatures below 585°C. | |||||||||||||||
| Applications | This alloy is primarily used for manufacturing turbine blades and gas turbine blades operating at temperatures below 750°C in aero-engines. It is also used for fasteners and springs in marine applications, pump and valve components for chemical equipment, and doctor blades for papermaking machinery. | |||||||||||||||