1. Different specifications

　　The commonly used stainless steel plates are divided into two types: 201 and 304 stainless steel plates. The actual composition is different. 304 has better quality, but is more expensive, while 201 is slightly inferior. 304 is an imported stainless steel plate, and 201 is a domestically produced stainless steel plate.

　　2. Different compositions

　　The composition of 201 is 17Cr-4.5Ni-6Mn-N, which is a type of Ni steel and a substitute for 301 steel. After cold processing, it has magnetism and is used for railway vehicles.

　　The composition of 304 is 18Cr-9Ni, which is the most widely used stainless steel and heat-resistant steel. Used for food production equipment, Xitong chemical equipment, nuclear energy, etc. Molybdenum also promotes the precipitation of intermetallic phases such as σ phase, κ phase, and Laves in austenitic stainless steel, which has adverse effects on the corrosion resistance and mechanical properties of the steel, especially leading to a decrease in plasticity and toughness. In order to maintain a single austenite structure in austenitic stainless steel, as the molybdenum content in the steel increases, the content of austenite forming elements (nickel, nitrogen, manganese, etc.) should also be correspondingly increased to maintain the balance between ferrite and austenite forming elements in the steel.

　　3. Different elements contained

　　201 has a high manganese content, with a bright and dark surface, and is prone to rusting due to its high manganese content.

　　304 contains a lot of chromium, with a matte surface and no rust Putting the two together makes a comparison. The most important thing is the different corrosion resistance performance. The corrosion resistance performance of 201 is very poor, so the price is much cheaper Due to the low nickel content in 201, its corrosion resistance is not as good as that of 304.

　　The difference between 4.201 and 304 is the issue of nickel content

　　And the price of 304 is relatively expensive now, usually close to 50000 per ton, but 304 can at least guarantee that it will not rust during use. (Potions can be used for experiments)

　　5. Stainless steel is not easy to rust because the formation of chromium rich oxides on the surface of the steel body can protect the steel body. 201 material belongs to high manganese stainless steel with higher hardness than 304, high carbon and low nickel. This material, which does not contain titanium or niobium, has a tendency towards intergranular corrosion due to inherent intergranular corrosion. Adding titanium and niobium, combined with stabilization treatment, can reduce intergranular corrosion. A high alloy steel that can resist corrosion in air or chemical corrosive media. Stainless steel is a type of steel that has a beautiful surface and good corrosion resistance, and does not require surface treatment such as plating to exhibit its inherent surface properties. It is commonly used in various types of steel and is commonly referred to as stainless steel.