Can Magnetic be used to judge whether stainless steel material?
Some people think that stainless steel is absolutely non-magnetic, and judge whether it is authentic by whether it is magnetic. Is Stainless Steel Magnetic?
Generally speaking, corrosion resistance is the main difference between stainless steel and carbon steel. Stainless steel has excellent corrosion resistance, which can not be replaced by other kinds of steel. It is widely used in industrial pipes, domestic pipes and high-grade decorative pipes.
There are many kinds of stainless steel, including austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, etc. Stainless steel material refers to alloy steel with Cr content of more than or equal to 13%, which is not easy to rust in the atmosphere.
Stainless steel is generally not magnetic, austenite is not magnetic, but ferrite is slightly magnetic. Different stainless steel has different corrosion resistance, different medium needs different corrosion resistance.
Austenitic stainless steel contains high chromium and nickel (chromium content is about 18%, Ni content is more than 4%). The internal structure of steel presents a kind of structure state called austenite, which has no magnetic conductivity and cannot be attracted by magnets. Austenitic stainless steel is often used as decorative materials, such as stainless steel pipes, towel racks, tableware, stoves, etc.
However, the stainless steel for knife and shear should be martensitic stainless steel. Because the scissors have the function of cutting objects, they need to have sharpness and hardness. Martensitic stainless steel can be used for cutting only after the hardness is increased. However, the internal structure of this kind of stainless steel is tempered martensite, which has magnetic conductivity and can be attracted by magnets.
Is Stainless Steel Magnetic? To sum up, we can not simply use whether it is magnetic to explain whether it is stainless steel material.
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