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Monel alloy 405, also known as Monel R405, is the free-machining grade of alloy 400. [24] The nickel, carbon, manganese, iron, silicon & copper percent remains the same as alloy 400, but the sulfur is increased from 0.024 max to 0.025-0.060%.
Monell received a patent in 1906 [9] on the manufacture of a nickel-copper alloy that became known as Monel alloy 400, [10] setting off a century of inventions in the alloy industry. [11] The alloy was named after Monell, but one l had to be truncated because at that time, family names were not allowed to be used as trademarks. [12]
1.1 Alkylation and Hydrofluoric Acid (HF Acid): monel valves in A494 M35-1, N04400 and Monel 400 1.2 Sulphuric acid: Alloy 20 valves in A182 CN7M, N08020 and Carpenter 20 1.3 Desalination: duplex and super duplex valves in A182 F51, F55, S31802, S32760, A995 4A and 6A
In 2000, the SMC published a 61-page document entitled "High-Performance Alloys for Resistance to Aqueous Corrosion" highlighting Incoloy, as well as Monel and Inconel products, and their use in fluid environments such as sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid, nitric acid, other acids as well as freshwater ...
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The galvanic series (or electropotential series) determines the nobility of metals and semi-metals.When two metals are submerged in an electrolyte, while also electrically connected by some external conductor, the less noble (base) will experience galvanic corrosion.
(Monel is a nickel–copper alloy that contains a minimum of 52 percent nickel.) Despite its high copper content, cupronickel is silver in colour. Cupronickel is highly resistant to corrosion by salt water , and is therefore used for piping, heat exchangers and condensers in seawater systems, as well as for marine hardware.