Specifications: commonly used stainless steel plate is divided into 201 and 304 two models, the actual is the composition is different, 304 quality is better, but the price is expensive, 201 worse. 304 for imported stainless steel plate, 201 for domestic stainless steel plate.
201 composition of 17Cr-4.5Ni-6Mn-N, is the section Ni steel, 301 steel alternative steel. It is magnetic after cold working and used for railroad vehicles.
304 composition of 18Cr-9Ni, is the most widely used stainless steel, heat-resistant steel. Used in food production equipment, Xitong chemical equipment, nuclear energy and so on.
201 is high in manganese, the surface is very bright with dark bright, high manganese is easy to rust. 304 contains more chromium, the surface appears matte, not rust. Two kinds of put together on the comparison. The most important thing is the corrosion resistance is different, 201 corrosion resistance is very poor, so the price is much cheaper. And because 201 contains low nickel, so the price is lower than 304, so the corrosion resistance is not as good as 304.
The difference between 201 and 304 is the nickel content. And the price of 304 are now more expensive, but 304 can at least ensure that in the process of use will not rust. (Available stainless steel potion to do experiments)
Stainless steel is not easy to rust because of the formation of chromium-rich oxides on the surface of the steel body can protect the steel body. 201 material belongs to the high manganese stainless steel hardness than 304, high carbon and low nickel.
Composition is different. (mainly from the carbon, manganese, nickel, chromium to distinguish between 201 and 304 stainless steel)
Steel carbon (C) silicon (Si) manganese (Mn) phosphorus (P) sulfur (S) chromium (Cr) nickel (Ni) molybdenum (Mo) copper (Cu)
AISI (304) ≤ 0.08 ≤ 1.00 ≤ 2.00 ≤ 0.045 ≤ 0.03 18- 20 8-10? 20 8-10?
AISI(201) ≤0.15 ≤1.00 5.5-7.5 ≤0.05 ≤0.03 16-18 3.5-5.5
Extended Information:
Typical Uses of Stainless Steel:
Most uses require that the original appearance of the building be maintained over time. In determining the type of stainless steel to be selected, the main considerations are the aesthetic standard required, the corrosive nature of the atmosphere at the location, and the cleaning regime to be employed.
However, other applications are increasingly just looking for structural integrity or impermeability. Examples include roofs and side walls of industrial buildings. In these applications, the owner's construction costs may be more important than aesthetics, and a surface that is not very clean is fine. The use of 304 stainless steel works quite well in dry interior environments.
But to maintain its appearance outdoors in rural and urban areas, it needs to be cleaned frequently. In heavily polluted industrial and coastal areas, the surface can get very dirty and even rusty. But to get the aesthetic effect in the outdoor environment, nickel-containing stainless steel is required.
So, 304 stainless steel is widely used for curtain walls, sidewalls, roofs and other architectural applications, but in highly aggressive industrial or marine atmospheres, 316 stainless steel is preferred. There are several design guidelines that include both 304 and 316 stainless steel.
Because the "duplex" stainless steel 2205 combines good atmospheric corrosion resistance with high tensile and elastic strength, it is also included in European guidelines. Product shapes, in fact, stainless steel is manufactured in all standard metal shapes and sizes, and there are many specialty shapes.
The most commonly used products are made from sheet and strip, but also medium and thick plates are used to produce special products, for example, the production of hot-rolled structural sections and extruded structural sections. And there are also round, elliptical, square, rectangular and hexagonal welded or seamless steel tubes and other forms of products, including profiles, bars, wire and castings. A number of different commercial surface finishes have been developed to meet the aesthetic requirements of architects.
3d printing field:
Stainless steel itself has good corrosion resistance, at high temperatures stainless steel can still maintain its excellent physical and mechanical properties and other characteristics, in the field of 3d printing is also widely used.
References:
Stainless steel ? Baidu Encyclopedia