Can magnets attract steel?

Question 1: Why do magnets attract iron but not steel? Magnetic fields act on all kinds of metal pairs, without exception. But there are three situations. Accordingly, metals can be divided into paramagnetism, antiferromagnetism and ferromagnetism.

1. paramagnetism: it can be slightly attracted by magnets.

2. Inverse magnet: it will be slightly repelled by the magnet.

3. Ferromagnet: It will be strongly attracted by magnets.

There are only three kinds of ferromagnets: iron, cobalt and nickel. The rest are paramagnetic or antiferromagnetic. As well as their alloys, their magnetic properties are close to ferromagnets in different degrees.

Stainless steel containing nickel can be attracted (strongly) by magnets. Stainless steel without nickel (usually containing chromium) has a weak reaction to this iron and is not easy to be detected. The latter has higher hardness because it contains chromium. The former is the so-called stainless iron.

Use aluminum and copper to hang slender metal wires, so that they are still and do not sway. When magnets are laterally close to aluminum or copper, they can be found to be slightly attracted or repelled. So they are paramagnetic and antiferromagnetic respectively.

Magnetite magnet

Magnet is a kind of magnet.

Magnets can adsorb metals such as iron, nickel and cobalt, commonly known as magnets. It can be divided into ordinary permanent magnets and electromagnets that have magnetism only when energized. If you make a magnet into a bar or needle and hang it, it will naturally point to the north and south poles of the earth. Magnets are divided into big magnets and small magnets.

Large magnet magnets are widely used. Using electromagnets, a crane for transporting steel was manufactured. When electrified, it becomes a powerful magnet, so it can absorb heavy steel. Cut off the power supply when you put down the steel.

Compared with the big magnet, the small magnet makes the compass look small and light, and its magnetism is much weaker. The function of compass is not to absorb iron, but to reflect the magnetic force of the earth.

Magnets attract iron, cobalt, nickel and other substances called magnetism. The regions with strong magnetism at both ends of a magnet are called magnetic poles, with one end being the north pole (N pole) and the other end being the south pole (S pole). Experiments show that like magnetic poles repel and opposite magnetic poles attract.

There are many primary magnets with opposite poles in iron. When there is no external magnetic field, these primary magnets are arranged in disorder, and their magnetism cancels each other and does not show magnetism to the outside world. When the iron is close to the magnet, these original magnets are arranged neatly under the action of iron, so that the end close to the magnet has the opposite polarity to the magnet and attracts each other. This shows that iron can be magnetized by magnets because of the existence of primary magnets. Metals such as copper and aluminum have no original magnet structure, so they cannot be attracted by magnets.

Question 2: Can stainless steel be attracted by magnets? Why? Austenitic stainless steel (some people call it stainless nickel) and martensitic stainless steel (some people call it stainless iron, but it is unscientific and easy to misunderstand, so it should be avoided). The content of chromium and nickel in austenitic stainless steel is relatively high (chromium content is about 18%, and nickel content is above 4%), so the internal structure of steel presents a state called austenite, and it cannot be attracted by magnets without magnetic conductivity. The austenitic structure of steel loses its ferromagnetism above 770 degrees Celsius. A large number of alloys are added to stainless steel, which makes the austenite phase region of some stainless steels expand to room temperature. This austenitic stainless steel has no ferromagnetism. Other ferritic stainless steels and martensitic stainless steels. It is ferromagnetic. Stainless steel iron that can be absorbed is generally called Cr 13, and stainless steel has 1Cr 18Ni9Ti and 0Cr 18Ni9Ti. People often use magnets to adsorb stainless steel to verify its advantages and disadvantages. If you don't smoke and have no magnetism, you will feel good. On the contrary, you think it's fake. In fact, this is an unrealistic identification method. Generally speaking, people who have been engaged in stainless steel materials for more than ten years know that relying on traditional methods to judge whether stainless steel is magnetic is likely to suffer. According to them, there are many kinds of stainless steel, which can be divided into austenite type and martensite or ferrite type according to the structure at room temperature. Austenite type is nonmagnetic or weakly magnetic, and martensite or ferrite type is magnetic. However, this is not necessarily the case. For example, the austenitic material 304, which is usually used to decorate the tubesheet, is usually non-magnetic, but it may appear magnetic due to the fluctuation of chemical composition or different processing States caused by smelting, which cannot be considered as forged or unqualified. In addition, the microstructure of 304 stainless steel will also transform into martensite after cold working. The greater the cold deformation, the more martensite transformation and the stronger the magnetic properties of steel. On the contrary, the inferior quality 200 series stainless steel is likely to be nonmagnetic, so it is a big mistake to judge that it is genuine stainless steel. Is determined by the characteristics of magnets. If it is explained by atomic current, it is the magnetic field generated by the current that magnetizes other objects and produces an electric field. Most substances that interact with electric fields to generate force are composed of molecules, which are composed of atoms, and atoms are composed of nuclei and electrons. Inside the atom, electrons keep spinning around the nucleus. Both of these movements of electrons will produce magnetism. But in most substances, the direction of electron movement is different and chaotic, and the magnetic effects cancel each other out. So most substances are nonmagnetic under normal circumstances. Ferromagnetic substances such as iron, cobalt, nickel or ferrite are different, and their internal electron spins can be arranged spontaneously in a small range to form spontaneous magnetization regions, which are called magnetic domains. After the ferromagnetic substance is magnetized, the internal magnetic domains are arranged neatly and in the same direction, so that the magnetism is enhanced and a magnet is formed. The process of magnet absorbing iron is the process of iron block magnetization. Magnetized iron blocks and magnets have attraction between different polarities, and the iron blocks and magnets are firmly "stuck" together. Suppose the magnet is magnetic. Whether a magnet can attract something is related to the magnetic permeability of the attracted thing, and the magnetic permeability is related to the magnetic domain. Among various elements in nature, nickel has the highest permeability, followed by cobalt and then iron. Other substances, such as copper, also have certain magnetic permeability, but it is so low that we can't feel it. Not everything containing iron can be sucked away by a magnet. Stainless steel belongs to alloy, that is, chromium and nickel are added on the basis of iron, such as 1Cr 13, that is, Cr, Cr, 3 10 stainless steel is added, that is, Cr, Ni and Si are added. 304 stainless steel, namely 1Cr 18Ni9Ti, is added with chromium, nickel and titanium ... This changes the original arrangement of magnetic domains, and the magnetic permeability is reduced, so we can't feel it even with our hands, so we can't feel it. By the same token, we can also make alloy stainless steel with very high permeability by alloying, which is becoming more and more popular because of its beautiful appearance, corrosion resistance and damage resistance. There are more and more places where stainless steel is used in pots, pots, urban sculptures, buildings and decorated rooms, but people don't know much about the discrimination of stainless steel. Some customers will try to use magnets on stainless steel utensils when buying stainless steel kitchenware. It is considered that magnets can attract stainless steel, but magnets cannot attract stainless steel. It seems that people still have misunderstandings about stainless steel. The difference between iron and steel lies in their carbon content. Iron-carbon alloy with carbon content less than 2% is steel, and iron-carbon alloy with carbon content less than 2% is >:>

Question 3: Can stainless steel be attracted by magnets? "Stainless steel" is just a general term, and the standard name is "acid and alkali resistant steel". Stainless steel is a kind of steel made by adding chromium, nickel and other metal elements on the basis of ordinary steel. The higher the content of metallic elements such as nickel, molybdenum and titanium, the better the quality of stainless steel. The traditional identification method is to use magnets. The smaller the magnetism, the better the quality.

Stainless steel only contains chromium, not nickel. Chromium-nickel stainless steel will not be attracted by magnets. It is used in the fields of industry and chemistry. Ordinary household appliances such as microwave ovens, rice cookers, electric water heaters and electric hot water bottles are made of chromium stainless steel, which can be attracted by magnets.

Question 4: Can magnets absorb steel? Pure steel does not suck. But some steels are magnetic, so they attract each other.

Question 5: Don't magnets absorb stainless steel? Stainless steel is divided into 1. Chromium stainless steel, and the main brands (martensite or ferrite type) are: 1cr 13, 2cr 13, 3cr 13, 1Cr 17. These stainless steels are magnetic and can be magnetized. 2. Cr-Ni stainless steel (austenitic type), the main brands are: 0Cr 18Ni9, 18Ni9, 0Cr 18Ni9Ti and other stainless steels are nonmagnetic and cannot be magnetized. It is wrong to judge stainless steel by whether magnets attract or not.

Question 6: Can stainless steel be attracted by magnets? We usually buy and sell stainless steel raw materials, and there are small magnets on the key chain for inspection. The worse the attraction, the better the effect.

Basically, the finished stainless steel is no problem with 303 and 304 stainless steel. If it is a standard 2 prefix, don't buy it. It will be used soon.

Question 7: Will stainless steel magnets be toxic? People often use magnets to judge whether it is stainless steel. They think that magnets can attract stainless steel and cannot attract stainless steel. It seems that people still have misunderstandings about stainless steel. In fact, this only distinguishes whether austenitic stainless steel and other stainless steels are magnetic or not. Generally speaking, austenitic stainless steel and austenitic precipitation hardening stainless steel are nonmagnetic (magnets can't hold them), while other stainless steels are ferrite and ferromagnetic (magnets can hold them). But stainless steel can't be judged only by the presence or absence of magnetism. For stainless steel, no matter whether the magnet can attract or not, as long as it meets its quality standards, it is stainless steel. If chromium and high nickel are added to molten steel, austenitic steel is stainless steel that magnets can't attract. If the main alloying elements in molten steel are chromium, iron, carbon and a small amount of nickel (or no nickel), then refined steel is stainless steel that can be attracted by magnets, also called ferritic stainless steel or martensitic stainless steel. Except austenitic stainless steel magnets, ferritic and martensitic stainless steels are magnetic. Because nickel is rarely stored in the world and the price is relatively expensive, stainless steel with high nickel content is also expensive in the market, and magnets can't attract it. At present, due to the large proportion of austenitic stainless steel in stainless steel, people have a wrong idea that all stainless steels are non-magnetic. In fact, there is another kind of stainless steel magnet that can't be sucked in, that is, stainless steel with high manganese or nitrogen, low nickel or no nickel, that is, chromium-manganese austenitic stainless steel. Therefore, it is impossible to judge whether it is stainless steel according to the presence or absence of magnetism.

Question 8: Can stainless steel be attracted by magnets? Why? There are two solid structures of iron, one is face-centered cubic, which is called austenite, and the other is body-centered cubic, which is called ferrite. Ordinary steel is ferrite at room temperature and can be attracted by magnets. There are many kinds of stainless steel. The most common are austenitic stainless steels containing chromium and nickel, such as 0Cr 18Ni9, containing chromium 18% and nickel 9%. This kind of stainless steel is very weak in magnetism. Chromium-containing stainless steel without nickel or low nickel is generally martensitic stainless steel, such as Cr 12, which has magnetic erosion and corrosion resistance is not as good as austenitic stainless steel. In recent years, due to the soaring price of nickel, some unscrupulous manufacturers have replaced austenitic stainless steel with martensitic stainless steel. So you can take a neodymium magnet with you to check the stainless steel. The stainless steel that can be absorbed is definitely not good.

Some can be attracted by magnets, and some can't.

Question 9: Can stainless steel be attracted by magnets? Should be able to

Stainless steel itself is an alloy of iron, nickel and chromium.

Magnets attract iron and nickel. If a stainless steel product can be attracted, it means that it contains a lot of iron and nickel. The corrosion resistance of this kind of stainless steel products is generally not very good, because the "stainless" nature of stainless steel mainly comes from chromium metal. But it is cheaper and more durable.

However, the quality of stainless steel can not be identified by magnets alone. Some inferior stainless steel products are doped with a lot of manganese metal. Manganese can not be attracted by magnets, but after adding manganese, the rust resistance and corrosion resistance of products are greatly reduced. Although this kind of products can't be attracted by magnets, their quality is poor.

Generally, the products of regular manufacturers are coded. For example, 13-0 and 18-8, the former number indicates the chromium content and the latter number indicates the nickel content. If not, it may be products such as stainless steel and iron.

Question 10: Are alloy steel magnets attracted? Alloy steel Alloy steel is called alloy steel if other elements are added besides iron and carbon. An iron-carbon alloy formed by adding one or more alloying elements to ordinary carbon steel. According to different added elements and proper processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance and non-magnetism can be obtained. It's almost impossible to suck, even if you suck, it's not tight ~