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The Difference Between Inconel And Monel

The Difference Between Inconel And Monel

The uniform corrosion of inconel products can occur in acidic or hot alkaline solutions. Through this mechanism, losses can be expected and allowed in the design. When the corrosion rate of machining inconel products is very slow, the metal is in a passive state, generally the corrosion resistance is better with a larger chromium content, but other solutes can be harmful.

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Product name: MONEL400 \ UNS N04400
International generic name: Machining MONEL alloy400, UNS N04400, NiCu30Fe W-Nr: 2.4360, Nicorros-alloy400, ATI400 ,, NAS NW400
Executive standards: ASTM B127 / ASME SB-127, ASTM B163 / ASME SB-163, ASTM B165 / ASME SB-165
Main components: carbon (C) ≤0.30, nickel e69da5e6ba907a6431333431363531 (Ni) ≥ 63.0, silicon (Si) ≤0.5, sulfur (S) ≤0.024, iron (Fe) ≤2.5, manganese (Al) ≤2.0, copper (Cu) 28.0 ~ 34.0
Physical properties: density: 8.9g / cm3, melting point: 1300-1350 ℃, magnetic: no
Mechanical properties: tensile strength: σb≥480Mpa, yield strength σb≥195Mpa: elongation: δ≥35%, hardness; HB135-179
Corrosion resistance and main use environment:
The corrosion resistance of Monel400 is generally superior to nickel copper. It is more resistant to corrosion by reducing media than pure nickel, and it is more resistant to corrosion by pure copper than oxidizing media. In particular, it is resistant to corrosion by hydrochloric acid and has excellent corrosion resistance to hot concentrated alkali. Monel400 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.
Monel400 is a deformable nickel-copper nickel-based alloy, which has good resistance to seawater corrosion and chemical corrosion, and has strong resistance to chloride stress corrosion cracking. This alloy is one of the few alloys that can be used in fluoride. It has good resistance to oxide stress fission corrosion in hydrofluoric acid and fluorine gas medium, such as seawater and salt water environment.
In medium concentration alkaline and salt solutions, Monel 400 also has very good corrosion resistance.
In colder alkaline environments, the alloy is used in weak acids such as sulfur and hydrogen fluoride.
Acid medium: Monel400 is corrosion resistant in sulfuric acid with a concentration of less than 85%. Monel400 is one of the few important materials that can withstand hydrofluoric acid.
Water corrosion: Monel400 alloy not only has excellent corrosion resistance under most water corrosion conditions, but also pitting and stress corrosion are rarely found, and the corrosion rate is less than 0.025mm / a.
High temperature corrosion: The maximum temperature of Monel400 working continuously in air is generally around 600 ℃. In high temperature steam, the corrosion rate is less than 0.026mm / a. Ammonia: Due to the high nickel content of Monel400 alloy, it is resistant to corrosion under anhydrous ammonia and ammoniated conditions below 585 ℃.
Supporting welding materials and welding process: The welding of MONEL400 alloy is recommended to use AWS A5.14 welding wire ERNiCu-7 or AWS A5.11 electrode EniCrCu-7. Nickel, welding process and instruction book are welcome to call us.
Stock situation: The stock size of MONEL400 alloy plate stock is 0.8mm-12mm, the stock size of MONEL400 alloy bar stock is Φ12mm-Φ220mm, pipe fittings and others can be customized according to customer requirements. The materials are mainly produced by Japanese metallurgy, American SMC, German ThyssenKrupp VDM. Provide original material certificate, customs declaration and certificate of origin.
Application areas: sulfuric acid and hydrofluoric acid equipment, marine heat exchangers, seawater desalination equipment, salt production equipment, marine and chemical machining equipment, propeller shafts and pumps, gasoline and water tank


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