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Duplex Stainless Steel Pipe Manufacturer

Duplex stainless steel is a chemical composition which is a mixture of approximately equal parts of ferrite and austenite. The mixture of these components makes the duplex stainless steel pipes twice as strong as regular austenitic or ferritic stainless steel pipes. Duplex stainless steel pipe show excellent stress corrosion cracking resistance (SCC). Duplex stainless steel pipe Manufacturer are resolute and tough and can manage temperatures up to minus 80 degrees C. The strength of the duplex stainless steel pipe makes it possible to weld on the thicker sections of the pipe. However, this should be done with uttermost care. These pipes offer high strength which in turn leads to weight saving. Compared to most pipes in the industry, duplex stainless steel pipe have one of the best price stability. Due to its low cost and weight saving, in the recent years, duplex stainless steel pipe have been growing in popularity as an alternative to nickel alloy based pipes.

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what is the name or number of nonmagnetic stainlessteel ?

It is commonly stated that "stainless steel is non-magnetic". This is not strictly true and the real situation is rather more complicated. The degree of magnetic response ormagnetic permeabilityis derived from the microstructure of the steel. A totally non-magnetic material has a relative magnetic permeability of 1. Austenitic structures are totally non-magnetic and so a 100% austenitic stainless steel would have a permeability of 1. In practice this is not achieved. There is always a small amount of ferrite and/or martensite in the steel and so permeability values are always above 1. Typical values for standard austenitic stainless steels can be in the order of 1.05 - 1.1. SeeComposition effects on the magnetic permeability of austenitic stainless steels
It is possible for the magnetic permeability of austenitic steels to be changed during processing. For example,cold work and weldingare liable to increase the amount of martensite and ferrite respectively in the steel. A familiar example is in a stainless steel sink where the flat drainer has little magnetic response whereas the pressed bowl has a higher response due to the formation of martensite particularly in the corners.
In practical terms, austenitic stainless steels are used for "non-magnetic" applications, for example magnetic resonance imaging (MRI). In these cases, it is often necessary to agree a maximum magnetic permeability between customer and supplier. It can be as low as 1.004.

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Jun 19, 2014 | Measuring Tools & Sensors

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