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What Are Different Grades of Monel Flanges

Monel and Grades

Monel is a nickel-copper alloy with a significant proportion of copper. It is the attribute of these two metals that Monel is resistant to seawater and steam at high temperatures. The existence of copper in the alloy imparts immunity against nitric acid and ammonia. At sub-zero temperature the Monel 400 has good mechanical properties, the melting point is set at 2370°-2460°F. The Carbon content here is maximum at 0.30% which is compromised due to Copper content which is 28-34% and Nickel is the most at 63.0%, and there is the absence of chromium, manganese is however 2.00%. The Tensile Strength of Monel is 75-90ksi, Yields up to 25-50ksi, and elongation of 60%. There are several grades of Monel, including Monel 400, Monel 401, Monel 404, Monel R-405, and Monel K-500, in addition to the alloy itself.


The Monel 400 Flanges is made up of materials like carbon up to 0.3%, Nickel up to 70.0%, iron 2.5%, Manganese 2.0%, and Copper 340%. 400 has a tensile strength of 480 MPa. Yield strength is 195 MPa, with a 35 percent elongation.


The Monel 401 has 45% of Nickel, copper same as 400, Manganese 2.25%, and Iron 0.75%. The Tensile Strength of 401 is 441 MPa and Yield Strength is 134 MPa with an elongation of 51%. Grade 404 is somewhat similar to grades 400 and 401 in certain aspects.


Monel R-405 has Nickel at 63%, Copper at 34%, Carbon at 2%, Manganese at 2%, Iron at 2.5%. R-405 has an 85 ksi tensile strength and a yield strength of 40%.


Monel K-500 consists of 0.25% Carbon, Nickel and Cobalt at 63%, Titanium at 0.85%, Copper at 33%, Iron at 2.00%, Manganese 1.50%, Titanium at 0.85%, and Aluminium at 3.15%. Monel K-500 has a tensile strength of 180 psi, yield strength of 135 psi, and a 45 percent elongation.



A flange is a type of pipe-fittings or can also be called an instrument. Flanges are used to join two pipes, valves, and pumps, among other things. Inspection, modification, and cleaning of pipes or other connection mechanisms are all made easier with the use of flanges. Flanges are typically welded or screwed together. It is usually bolted together with a gasket in between to properly seal off a joint. The flanges are available in all shapes and sizes. One can find massive flanges that are only used in industries and plants. The benefits of Monel are many like High resistance to stress and corrosion cracking, high resistance to pitting, high strength, good resistance to chloride, high thermal conductivity, good performance, and weldability, with durability. Likewise, the Monel flanges are used in various applications like Power Industry systems, Heat Exchangers, Tubes and Pipes for the gas and oil industry, mechanical and structural components of aerospace, the Automobile industry, etc. Monel is a great material for any application because it consists of some great metals that make it strong and durable for the process.



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