Stainless steel is alloy steel that contains lots of chemical compositions, in theory, it doesn't rust. However, if you have ever owned or used a stainless steel product, it is likely that you have noticed rust (corrosion) and you may have even questioned if its name is a misnomer. Why does a material called “stainless” rust at last?

Most people are quite familiar with metals; like steel and stainless steel,  which are used widely in our daily life, just like steel,  stainless steel corrodes when it’s exposed to environments such as seawater, stronger chemicals detergents. Often, without understanding the exact science of what is occurring, people accept that exposing a metal product to seawater has a damaging effect. The science behind corrosion from seawater is that the water contains chlorine, which is corrosive to metals, including stainless steel. However, corrosion of stainless steel can also occur without producing any corrosion products to analyze (other than rust), and when an obvious corrosive environment is unable to be detected.

To understand what makes stainless steel rust it is first important to understand the science that typically prevents it from rusting. Steel is made of iron and carbon, and stainless steel contains iron, carbon, and anywhere chromium and nickel. Stainless steel can contain other elements such as nickel and manganese, but chromium is the key element which makes it rust resistant. When the surface of the normal steel is exposed to oxygen, it usually forms the ferric oxide (Fe2O3) which has the well-known red rust color. Ferric oxide doesn’t form a continuous layer on the steel because the oxide molecule has a larger volume than the underlying iron atoms, and eventually spalls off leaving fresh steel exposed which then starts a deleterious rusting cycle. When stainless steel is exposed to oxygen, chromium oxide is created on the surface of the steel because chromium has a very strong affinity for oxygen. The chromium oxide is a very thin layer which doesn’t spall off, and it prevents further oxidation of the stainless steel. Even if stainless steel is scratched and the chromium oxide layer is removed, a new chromium oxide layer will form and protect the rest of the stainless steel beneath it. As long as there is sufficient chromium present, the chromium oxide layer will continue to protect the stainless steel and prevent it from rusting.

Although rust is something most of us see on an everyday basis and appears to be a simple occurrence it can result from a number of complex processes but don't worry; it can be solved easily, just by contacting us online.

Stainless steels are known for corrosion resistance, which is largely due to the steel's chromium concentration. There are several different types of stainless steels. The two main types are austenitic and ferritic, each of which represnets a different atomic arrangement. Due to this difference, ferritic stainless steels are generally magnetic while austenitic stainless steels usually are not. A ferritic stainless steel owes its magnetism to two factors: its high concentration of iron and its fundamental structure.

The most popular stainless steel is Type 304, which contains approximately 18 percent chromium and 8 percent nickel. At room temperature, the thermodynamically stable crystal structure of 304 stainless steel remains stable; nevertheless, the alloy's nickel concentration, as well as the small amounts of manganese (about 1 percent), carbon (less than 0.08 percent) and nitrogen (about 0.06 percent), maintains structure and therefore the alloy is nonmagnetic. If the alloy is mechanically deformed, i.e. bent, at room temperature, it will partially transform to the ferritic phase and will be partly magnetic, or ferromagnetic, as it is more precisely termed.

Fundamentally, the reasons why ferritic stainless steels are ferromagnetic while austenitic stainless steels are not are quantum-mechanical in nature. Suffice it to say a ferromagnetic metal consists of atoms that have an incomplete inner core of electrons and a crystal structure that results in a high density of electron states in the energy bands formed from the incomplete atomic inner core. It also has an atomic spacing that allows for exchange effects among electrons in the energy bands associated with the incomplete inner-core level. If the atoms in the metal crystal are too widely spaced, the exchange effects are too small to cause alignment of the magnetic moments of neighboring atoms and the crystal will not exhibit ferromagnetism. The requirement of a high density of states stems from the Pauli Exclusion Principle. This principle prohibits electrons with the same spin from occupying the same energy level. Consequently, if the density of electron states is relatively small, electrons will need to occupy higher energy states in order for all to have the same spin. If the increase in energy resulting from the occupancy of higher energy levels exceeds the decrease in energy resulting from electron exchange energy, the structure will not be ferromagnetic.

Kind of difficult to understand content, but with magnet or without mnanet, which one is better, hard to say, it depends on your budget and the place you use it, both got the advantages, suit best is the best.

Some people may ask how this coils were cut to sheets, here following the shart will show you how this is done, it can be made for different purpose of usage.

For more information, please feel free to contact us by email or online messeaging, we will get back to you soon!

tag: stainless steel sheet, stainless steel coil

Stainless steel U channel, someone called stainless steel C channel, they are the same thing, here the C channel we are talking about is for decoration purpose, not for industriall use.

It can be of different grade, surface finish, color, thickness and length, here following you will get an idea that the C channel we are talking about, it can be used for project like ceramic wall cladding, furniture cladding, glass cladding and many other places, enrish the color of decoration.

What is the smallest size of stainless steel U channel, let me tell you, it is 5x3x5MM, quite small, right? we can make it with nice corners, when you cladding the grass, it will fit the edges of glass perfectly.  There are still other designs avaialble, or custom made.

If you have this kind of requirement, just let us know!

Are you looking to purchase a water tank for your home and need to make a decision about what type of tank to buy? This question is easy, get a stainless steel water tank. Due to the fact that there are a variety of different water tank options available. Hopefully we can help you make the right choice of water tank for your needs.

With the develpment of society, people's life is getting more and more better, in the meantime, requires better product, like water tank for water shortage areas, before people use steel to make a tank or plastic tank, but they are facing a problem that the steel will get rusty, and the plastic may get vulnerable to bush-fire and are prone to catastrophically fail due to water pressure causing outward pressure and plastics softening in extreme heat conditions, so stainless steel is the best choice.

Grade 304 is used for the lid and the body, it has very good rusty resistent ability and corrosion resistent ability, fully food grade, and also it is fire-proof and it can withstand under certain pressure, even it has higher costs, but surely it will use longer and suitable to use in terrible conditons. Besides, the material is eco-friendly, it can be recycled.

That is what we are suggestion: stainless steel tanks, your first choice.

To know more, please contact us.

We suply stainless steel water tank lid.

Stainless steel perforated sheets for the words you will know that it was made by a sheet, being punched by machines with different moulds, then you will get different shapes of holes or shapes, here following you will see some of them, but mostly if you want to custom made a perforated sheet, please just feel free to let us know, we have the ability to offer you different solutions for your projects, either by puching or by laser cutting.

Find here Stainless Steel Perforated Sheets manufacturers, suppliers & exporters in China.

How to cut stainless steel sheet? If you are new to this material, you may have lots of questions, but if you are professional, then it's easy. Here are several options, Which one to pick, depends on the thickness of your stainless steel sheet.

You can use simple power tools, electrical circular saw; scissors for thin sheet; wire cutting, you may see not much, table, and plasma cutter, effective way to cut; of course, the best way to cut stainless steel we suggest is to use professional cutter, hydrolic cutter for stright cutting, or laser cutting, that is the great choice, as you can cut the stainless steel into the shape you want, you will have clean and beautiful edges.

These are the ways to accomplish your job perfectly. Depending upon the specific type of the sheet and design of your products.

For more information, please feel free to contact us!