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Monel and Hastelloy are both nickel-based alloys. What are their specific differences?

2016-02-14View Chinese Original

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Monel and Hastelloy are both nickel-based alloys. What are their specific differences?

Reply #22016-02-14

Monel alloy: single-phase austenitic structure, strong corrosion resistance, especially resistant to corrosion by hydrogen fluoride and fluorine. Monel alloy is used in hydrogen fluoride and fluorine equipment in oil refining alkylation units.； Hastelloy: Face-centered cubic structure, strong corrosion resistance, especially corrosion resistance to hydrogen chloride, chlorine and hypochlorous acid. Hastelloy is mostly used in chlor-alkali industrial equipment.

Reply #32016-02-14

Hastelloy B-2 alloy is a Ni-Mo alloy with extremely low carbon and silicon content. It reduces the precipitation of carbides and other phases in the weld and heat-affected zone, thereby ensuring good corrosion resistance even in the welded state. As we all know, Hastelloy B-2 alloy has excellent corrosion resistance in various reducing media and can withstand corrosion at any temperature and concentration of hydrochloric acid under normal pressure. It has excellent corrosion resistance in non-aerated medium-concentration non-oxidizing sulfuric acid, various concentrations of phosphoric acid, high-temperature acetic acid, formic acid and other organic acids, bromic acid and hydrogen chloride gases. At the same time, it is also resistant to corrosion by halogen catalysts. Therefore, Hastelloy B-2 alloy is usually used in a variety of harsh petroleum and chemical processes, such as hydrochloric acid distillation, concentration ； In the production processes of alkylation of ethylbenzene and low-pressure carbonylation of acetic acid. Monel alloy has excellent corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid and their derivatives. acid medium: M400 is corrosion resistant in sulfuric acid with a concentration less than 85%. M400 is one of the few important materials that can withstand hydrofluoric acid. water corrosion: M400 alloy not only has excellent corrosion resistance under most water corrosion conditions, but also pitting corrosion, stress corrosion, etc. are rarely found, and the corrosion rate is less than 0.025mm/a high temperature corrosion.: The maximum temperature of M400 for continuous operation in air is generally around 600°C. In high-temperature steam, the corrosion rate is less than 0.026mm/a. ammonia: Due to its high nickel content, Monel 400 alloy can withstand corrosion under anhydrous ammonia and ammonia conditions below 585°C.

Reply #42016-02-15

Come and learn* Yes, the company is currently involved in high alloy and nickel-based alloy projects. Thank you for your advice.

Reply #52016-02-15

Monel alloy: single-phase austenitic structure, strong corrosion resistance, especially resistant to hydrogen fluoride and fluorine corrosion； Hastelloy: Face-centered cubic structure, strong corrosion resistance, especially corrosion resistance to hydrogen chloride, chlorine and hypochlorous acid.

Reply #62016-02-16

Our company's customers are increasingly using nickel-based alloys, and we have just started doing business in this area. Does anyone have more detailed information about nickel-based alloys?

Reply #72017-06-16

This post was last edited by nj1952 on 2017-6-16 17:28 2. Foreign nickel-based corrosion-resistant alloy standards (not checked for newness) (1) American nickel-based corrosion-resistant alloy standard ASTM B163-84 Technical conditions for nickel and nickel alloy seamless pipes for condensers and heat exchangers ASTM B166-84 Nickel-chromium-iron alloy (UNS N06600 and N06690) technical conditions for round rods, rods and wires ASTM B167-83 Technical conditions for nickel-chromium-iron alloys (UNS N06600 and N06690) seamless pipes ASTM B168-83 Technical conditions for nickel-chromium-iron alloys (UNS N06600 and N06690) plate, sheet and strip ASTM B333-84 Technical conditions for nickel-molybdenum alloy plates, sheets and strips ASTM B335-83a Technical conditions for nickel-molybdenum alloy round rods ASTM B407-84 Technical conditions for nickel-iron-chromium alloy seamless pipes ASTM B408-82 Technical conditions for nickel-iron-chromium alloy round rods and bars ASTM B409-80 Technical conditions for nickel-iron-chromium alloy plates, sheets and strips ASTM B423-84 Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825 and N08221) Technical Conditions for Seamless Pipes ASTM B424-84 Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221) Technical Conditions for Plate, Sheet and Strip ASTM B425-84 Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221) Specifications for round rods and rods ASTM B434-83a Specifications for Nickel-Molybdenum-Chromium-Iron Alloy (UNS N10003) Plate, Sheet and Strip Specifications ASTM B435-84 Specifications for Nickel-Chromium-Molybdenum-Fe Alloy (UNS N06002) Plate, Sheet and Strip Specifications ASTM B443-84 Technical conditions for nickel-chromium-molybdenum-niobium alloy (UNS N06625) plate, sheet and strip ASTM B444-84 Technical conditions for nickel-chromium-molybdenum-niobium alloy (UNS N06625) pipes ASTM B445-81 Technical conditions for nickel-chromium-iron-niobium-molybdenum-tungsten alloy (UNS N06102) seamless pipes ASTM B446-84 Technical specifications for nickel-chromium-molybdenum-niobium alloy (UNS N06625) round rods and rods ASTM B462-82 Specifications for forged or rolled chromium-nickel-iron-molybdenum-copper-niobium stabilized alloy (UNS N08020) pipe flanges, forged fittings, valves and components for high temperature corrosion resistance ASTM B463-84 UNS N08020, UNS Technical conditions for N08026 and UNS N08024 alloy plates, sheets and strips ASTM B464-84 UNS N08020, UNS N08026 and UNS N08024 alloy welded pipes (PIPE) Technical conditions ASTM B468-84 UNS N08020, UNS N08026 and UNS N08024 alloy welded pipe (TUBES) technical conditions ASTM B471-85 Chromium-nickel-iron-molybdenum-copper-niobium stabilized alloy (UNS N08020) technical conditions for round spring wire ASTM B472-85 Chromium-nickel-iron-molybdenum-copper-niobium stabilized alloy (UNS N08020) technical conditions for billets and rods for reforging ASTM B473-82 Technical conditions for chromium-nickel-iron-molybdenum-copper-niobium stabilized alloy (UNS N08020) rods and wires ASTM B474-82 Technical conditions for electric welding chromium-nickel-iron-molybdenum-copper-columbium stabilized alloy (UNS N08020) pipe (PIPE) ASTM B475-85 Chromium-nickel-iron-molybdenum-copper-niobium alloy (UNS N08020) Technical conditions for circular braided wire ASTM B509-77 (reaffirmed in 1983) Supplementary requirements for nickel alloy plates for the nuclear industry Technical conditions ASTM B510-77 (reaffirmed in 1983) Supplementary requirements for nickel alloy round bars and rods for the nuclear industry Technical conditions ASTM B511-81 Technical conditions for nickel-iron-chromium-silicon alloy rods and profiles ASTM B512-81 Technical conditions for nickel-chromium-silicon alloy (UNS N08330) billets and rods ASTM B513-79 Supplementary requirements for nickel alloy seamless pipes for nuclear energy Technical conditions ASTM B514-85 Technical conditions for nickel-iron-chromium alloy welded pipes (PIPE) ASTM B515-85 Nickel-iron-chromium alloy (UNS N08800) Welded pipe (TUBE) technical conditions ASTM B516-85 Nickel-chromium-iron alloy (UNS N06600) welded pipe (TUBE) technical conditions ASTM B518-81 Nickel-chromium-iron-niobium-molybdenum-tungsten alloy (UNS N06102) technical conditions for round rods and rods ASTM B519-81 Specifications for Nickel-Chromium-Iron-Niobium-Molybdenum-Tungsten Alloy (UNS N06102) Specifications for Plate, Sheet and Strip ASTM B535-82 Specifications for Nickel-Iron-Chromium-Silicon Alloy (UNS N08330) Seamless and Welded Pipes (PIPE) ASTM B536-83 Nickel-Iron-Chromium-Silicon Alloy (UNS N08330 and N08332) Technical conditions for plate, sheet and strip ASTM B546-83 Technical conditions for Ni-Fe-Cr-Si alloy (UNS N08330) electrofusion welded pipe (PIPE) ASTM B564-82 Technical conditions for nickel alloy forgings ASTM B572-83a Technical conditions for nickel-chromium-molybdenum-iron alloy (UNS N06002) round rods ASTM B573-83a Specification for nickel-molybdenum-chromium-iron alloy (UNS N10003) round rods ASTM B574-84 Specification for low-carbon nickel-molybdenum-chromium alloy round rods ASTM B575-86 Specification for low-carbon nickel-molybdenum-chromium alloy plate, sheet and strip ASTM B581-81 Specification for nickel-chromium-iron-molybdenum-copper alloy round rods ASTM B582-84 Technical conditions for plate, sheet and strip of nickel-chromium-iron-molybdenum-copper alloy ASTM B599-80 Technical conditions for plate, sheet and strip of nickel-iron-chromium-molybdenum-niobium stabilized alloy (UNS N08700) ASTM B621-83a Technical conditions for round rods of nickel-iron-chromium-molybdenum alloy (UNS N08320) ASTM B625-83 Ni-Fe-Cr-Mo-Cu low carbon alloy (UNS N08904 and UNS N08925) technical conditions for plate, sheet and strip ASTM B626-84 Nickel alloy welded pipe (TUBE) technical conditions ASTM B649-83 Ni-Fe-Cr-Mo-Cu low carbon alloy (UNS N08904 and N08925) technical conditions for rods and wires ASTM B668-84 UNS N08028 Seamless Pipe (TUBE) Specifications ASTM B672-80 Nickel-Iron-Chromium-Molybdenum-Niobium Stabilized Alloy (UNS N08700) Rod and Wire Specifications ASTM B673-83 UNS N08904 and UNS N08925 Welded Pipe (PIPE) Specifications ASTM B674-83 UNS N08904 and UNS N08925 welded pipe (TUBE) technical conditions ASTM B675-80 UNS N08366 welded pipe (PIPE) technical conditions ASTM B676-80 UNS N08366 welded pipe (TUBE) technical conditions ASTM B677-84 UNS N08904 and UNS N08925 seamless pipe technical conditions

Reply #82017-06-16

(2) Federal German nickel-based corrosion-resistant alloy standard DIN 17 741 Chemical composition of machinable nickel alloys containing low alloys DIN 17 742 Chemical composition of machinable nickel alloys containing chromium DIN 17 743 Chemical composition of machinable nickel alloys containing copper DIN 17 744 Chemical composition of machinable nickel alloys containing molybdenum and chromium DIN 17 745 Chemical composition of machinable alloys composed of nickel and iron DIN 17 750 Properties of strips and plates made of nickel and machinable nickel alloys DIN 17 751 Properties of pipes and tubes made of nickel and machinable nickel alloys DIN 17 752 Properties of rods made of nickel and machinable nickel alloys DIN 17 753 Properties of wires made of nickel and machinable nickel alloys DIN 17 754 Die forgings and open die forgings made of nickel and machinable nickel alloys DIN 59 740 Dimensions and permissible deviations of nickel and machinable nickel alloy hot-rolled plates and strips DIN 59 741 Dimensions and permissible deviations of nickel and machinable nickel alloy hot-rolled strips DIN 59 742 Dimensions and permissible deviations of nickel and machinable nickel alloy hot-rolled circular plates and rings DIN 59 745 Dimensions and permissible deviations of nickel and machinable nickel alloy cold-rolled plates and strips DIN 59 746 Dimensions and permissible deviations of processable nickel and nickel alloy cold-rolled strips and bars DIN 59 755 Dimensions and permissible deviations of processable nickel and nickel alloy cold-rolled pipes DIN 59 760 Dimensions and permissible deviations of nickel and processable nickel alloy hot-rolled round bars DIN 59 761 Dimensions and permissible deviations of nickel and processable nickel alloy hot-rolled square bars DIN 59 762 Dimensions and permissible deviations of nickel and processable nickel alloy hot-rolled hexagonal bars DIN 59 763 Dimensions, permissible deviations and static values of hot-rolled rectangular bars of nickel and machinable nickel alloys DIN 59 765 Dimensions and permissible deviations of drawn round bars of nickel and machinable nickel alloys DIN 59 766 Dimensions and permissible deviations of drawn square bars of nickel and machinable nickel alloys DIN 59 767 Dimensions and permissible deviations of drawn hexagonal bars of nickel and machinable nickel alloys DIN 59 768 Dimensions, permissible deviations and static force values of nickel and machinable nickel alloy drawn rectangular sharp edge rods DIN 59 780 Dimensions and permissible deviations of nickel and machinable nickel alloy hot rolled round wire rods DIN 59 781 Dimensions and permissible deviations of nickel and machinable nickel alloy drawn round wire rods DIN 59 782 Dimensions and permissible deviations of nickel and machinable nickel alloy drawn square wire rods DIN 59 783 Dimensions and allowable deviations for drawn hexagonal wires of nickel and machinable nickel alloys (3) British standard for nickel-based corrosion-resistant alloys BS 2901: Part 5: 1970 British technical conditions for electrodes and wires for gas shielded arc welding, Part 5: Nickel and nickel alloys BS 3071:1986 British technical conditions for nickel-copper alloy castings BS 3072:1983 British technical conditions for nickel and nickel alloy sheets and medium plates BS 3073:1977 British Technical Conditions for Nickel and Nickel Alloy Strips AMD 4201BS3073:1977 Modification Notice No. 2 to Technical Conditions for Nickel and Nickel Alloy Strips (issued and effective on March 31, 1983) BS 3074:1983 British Technical Conditions for Nickel and Nickel Alloy Seamless Pipes AMD 4491BS3074:1983 Notification of amendment No. 1 to technical conditions for nickel and nickel alloy seamless pipes (issued and effective on April 30, 1984) BS 3075:1976 British technical conditions for nickel and nickel alloy wire AMD 4112BS3075:1976 Notification of amendment No. 1 to technical conditions for nickel and nickel alloy wire (issued and effective on November 30, 1982) BS 3076:1976 British Technical Conditions for Nickel and Nickel Alloy Rods AMD 4111BS3076:1976 Modification Notice No. 2 of Technical Conditions for Nickel and Nickel Alloy Rods (issued and effective on February 28, 1983) (4) Japanese Nickel-based Corrosion Resistant Alloy Standard JIS G 4901-1981 Corrosion Resistant and Heat Resistant Alloy Rods JIS G 4902-1984 Corrosion Resistant and Heat Resistant Alloy Plate JIS G 4903-1981 Inconel alloy seamless pipes for pipelines JIS G 4904-1981 Inconel alloy seamless pipes for heat exchangers (5) French nickel-based corrosion-resistant alloy standard NF A 54-401-June 1973 Nickel and nickel alloys, nickel-molybdenum alloys and nickel-molybdenum-chromium alloys

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