In the eyes of many consumers, there is almost no difference between 304 stainless steel and 201 stainless steel, because it can hardly be distinguished by the naked eye. Here we introduce some methods to distinguish between 304 and 201.
1. Specifications: Commonly used stainless steel plates are divided into 201 and 304 models. Actually, the composition is different, and the 304 quality is better, but the price is expensive, and the difference is 201. 304 is imported stainless steel plate and 201 is domestic stainless steel plate.
2. Scope of application: The composition of 201 is 17Cr-4.5Ni-6Mn-N, which is a substitute steel for Ni steel and 301 steel. 201 stainless steel has good acid and alkali resistance and is magnetic after cold working. It is used in railway vehicles, interior decorative pipes and industrial pipes.
3, 304 composition of 18Cr-9Ni, is the most widely used stainless steel, heat-resistant steel. Used in outdoor construction, food production equipment, Xitong chemical equipment, nuclear energy, etc.
4, 201 is higher in manganese, the surface is very bright with dark light; 304 contains more chromium, the surface is matte (can be used for experiments with stainless steel potion).
6, stainless steel is not easy to rust because the formation of chromium-rich oxide on the surface of the steel can protect the steel body, 201 material belongs to high manganese stainless steel than 304 hardness, high carbon and low nickel.
7, different composition (mainly from carbon, manganese, nickel, chromium containing several aspects to distinguish between 201 and 304 stainless steel)
8, physical properties: 304 stainless steel toughness, 201 stainless steel toughness is insufficient, the stretching process requires a lot of force.
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
AISI (201) ≤0.15≤1.00 5.5-7.5≤0.05≤0.03 16-18 3.5-5.5
Summary: Stainless steel is a kind of steel, stainless steel is not rusty, is in the iron, carbon on the basis of the addition of nickel, chromium, manganese and other metals, so that it produces anti-rust performance. The biggest difference between 304 and 201 is that they have different chemical constituents and contain different nickel, chromium and manganese components, so there are differences in corrosion resistance and toughness, and chemical composition determines physical properties and chemical properties.