Can a magnet hold stainless steel? Can stainless steel be attracted by magnets

Why is stainless steel also magnetic? People often think that magnets adsorb stainless steel, verify their advantages and disadvantages, and verify their authenticity, do not absorb non-magnetic, think that it is good, genuine; If the smoker is magnetic, it is considered to be a fake. In fact, this is an extremely one-sided and unrealistic way of discerning errors.

There are many types of stainless steel, which can be divided into several categories according to the structure at room temperature: 1 Austenite type: such as etc.; 2 Martensite or ferritic type:

Such as etc.; The austenite type is amagnetic or weakly magnetic, and the martensitic or ferrite is magnetic. Most of the stainless steel commonly used as decorative tube sheets is austenitic 304 material, which is generally non-magnetic or weakly magnetic, but magnetic may also occur due to fluctuations in chemical composition or different processing states caused by smelting, but this cannot be regarded as counterfeit or unqualified, what is the reason for this? As mentioned above, austenite is non-magnetic or weakly magnetic, while martensitic or ferrite is magnetic, due to improper segregation or heat treatment during smelting, it will cause a small amount of martensitic or ferrite structure in austenite 304 stainless steel.

In this way, there will be a weak magnetic property in 304 stainless steel. In addition, after cold working, the microstructure of 304 stainless steel will also be transformed to martensitic, and the greater the deformation degree of cold working, the more martensitic transformation, and the greater the magnetic property of the steel. Like a batch of steel strips, 76 tubes are produced, and there is no obvious magnetic inductance, and tubes are produced.

Due to the large deformation of the bend, the magnetic induction is more obvious, and the deformation of the square rectangular pipe is larger than that of the round pipe, especially the corner part, the deformation is more intense, and the magnetic induction is more obvious. In order to completely eliminate the magnetism of 304 steel caused by the above reasons, the austenite structure can be stabilized by high-temperature solution treatment, so as to eliminate the magnetism. In particular, it should be mentioned that the magnetism of 304 stainless steel caused by the above reasons is not at the same level as that of stainless steel made of other materials, such as 430 and carbon steel, that is to say, the magnetism of 304 steel always shows weak magnetism.

This tells us that if the stainless steel strip is weakly magnetic or not magnetic at all, it should be judged as 304 or 316 material; If it is the same as the magnetism of carbon steel, it shows strong magnetism, because it is not 304 material. Follow-up: Is that better (is the austenite type nonmagnetic or weakly magnetic) or (martensitic or ferrite is magnetic)?

This is not to say that austenite is better than martensitic or ferrite (vice versa), you have to look at the specific material, how to use, generally austenitic stainless steel is not suitable for food utensils, because in some environments (such as long-term sauce, vinegar and salt, heating, etc.) it is easy to release nickel elements harmful to the human body, so the applicable utensils are mostly ferritic or martensite (these two are nickel-free stainless steel). In addition, steel refers to iron with a carbon content of no more than 2%, and it is not allowed to have such a high carbon content to achieve corrosion resistance, so there is only "stainless steel" and no "stainless iron" in the industry.

Stainless steel is not possibleMagnetsSuck in.

Regular stainless steel products can not be attracted by magnets, if the stainless steel bought back can be adsorbed by magnets, it means that it contains iron and nickel.

High, this stainless steel is of very poor quality, has poor corrosion resistance, and is prone to rust. The properties of stainless steel in stainless steel are mainly derived from the element chromium.

However, the addition of manganese to stainless steel also prevents it from being adsorbed by magnets.

How to choose a good stainless steel product

1. Look at the classification of stainless steel. Stainless steel can be divided into ferrite, austenite, and martensitic according to different chromium-nickel content.

Consumers need to choose according to actual needs, such as martensitic, because of poor weldability, so it cannot be used to make anti-theft windows.

2. Look at the quality of the process. When buying stainless steel, first look at whether the construction process of the surface is intact, whether the surface paint plating is uniform and smooth, if it is welded, it is necessary to focus on the welding point process to ensure that there is no missing welding, unwelding, etc.

Summary. The reason why stainless steel is attracted by magnets is because it contains high levels of iron and nickel.

Why can stainless steel be attracted by magnets?

The reason why stainless steel is attracted by magnets is because it contains high levels of iron and nickel.

There are many types of stainless steel on the market, and the chemical composition contained in them will be different, so some stainless steel will contain magnetism, while some stainless steel will not contain magnetism, or the magnetism will be relatively weak.

Some special steels, such as austenitic stainless steel in stainless steel, due to the addition of higher chromium and nickel (chromium content is about 18%, Ni is more than 4%), the internal structure of the steel presents a state called austenite, which is not magnetic and cannot be attracted by magnets. Other stainless steels used to make knives and scissors are martensitic stainless steels. These stainless steels must be heat-treated to undergo internal microstructure transformation.

Only after increasing the hardness can you make knives and scissors. However, the internal structure of this type of stainless steel is tempered martensitic, which is magnetically permeable and can be attracted by magnets.