Buyer how to discern between true and false stainless steel flange

Stainless steel flange that because of different alloy content is pided into several hundred kinds of. How to discern between true and false of stainless steel flange is buyer?
Except austenitic stainless steel flange magnet suck on the outside, ferritic and martensitic stainless steel flange have magnetic properties.
Nickel element in reserves in the world are very few, the price is expensive. Therefore, the high content of nickel in stainless steel flange on the market price is higher also, and magnet is not on. In fact, there is a stainless steel flange is not on the magnet. That is less high manganese containing nickel or nickel stainless steel flange. This kind of stainless steel flange market prices higher than nickel stainless steel flange lower than 1000 yuan per ton. Some dealers are using people “good stainless steel flange on the magnet is not” misunderstanding, deceive consumers, as your price and the high nickel stainless steel flange.
There are more than 100 stainless steel, features and functions. Generally makes decoration, landscape, sculpture, selection of austenitic stainless steel. Because of austenitic stainless steel for low heat conductivity, using it to do the kettle, frying pan, pot is not appropriate, will use a lot of energy, has also extended boiling water to cook. Do with ferritic stainless steel frying pan, pot, not only has excellent corrosion resistance, and its thermal conductivity is higher than austenitic stainless steel nearly half. In the washing machine barrel, water heater, xiancai basins, etc., as long as contact with water vessels should choose ferritic stainless steel. Someone complained about the stainless steel cutlery, this is because choose the wrong stainless steel. Austenitic stainless steel hardening, not suitable for cutting tool, cutting tool. Made of martensitic stainless steel cutting tools by heat treatment, such as change the hardness of stainless steel quenching and tempering.
Iron and steel is how to distinguish between carbon content. Carbon content is under 2% of the iron carbon alloy steel, carbon content over 2% is called iron. Steel is because there are both toughness and elasticity and rigidity, are widely used. Life encounters is steel, but with different people call. For stainless steel flange, regardless of the magnets on it or not, as long as meet the quality standards, are all stainless steel flange. Therefore, from the perspective of metallurgy, there is no stainless iron.
Corrosion resistant stainless steel flange are the main elements of chrome. Chromium content in more than 10.5% of the steel is not easy to rust. Smelting with different alloy elements, but also have the magnets and the distinction that are not on. Stainless steel is generally points according to the organization structure, can be pided into austenite, ferrite and martensite several categories.
If into the molten steel in the different proportion of chrome nickel, etc., austenitic steel is tempered magnets are not on the stainless steel;
If join into the molten steel chrome and small amounts of nickel and nickel (or without), tempered steel is magnets out of stainless steel, also called ferritic stainless steel;
Martensite stainless steel flange of main alloying elements is chromium, iron and carbon.
Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

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