Introduction to the grades, materials and standards of stainless steel wire mesh raw materials

Introduction to the grades, materials and standards of stainless steel wire mesh raw materials

Stainless steel wire mesh is also known as stainless steel woven mesh, wire woven square hole screen, stainless steel screen, stainless steel filter, stainless steel crimped mesh.
The inspection of stainless steel woven mesh must be carried out in accordance with the technical requirements of the national standard GB/T5330-2003, and the relevant measuring tools and testing instruments must be used correctly. The quality inspection of stainless steel square hole mesh is 100% inspection, and no sampling method is used. 
      1. Inspection of stainless steel wire diameter and deviation, material quality. The surface of stainless steel wire should be smooth and bright, and there should be no defects such as longitudinal tensile marks, burrs, rust, etc.; the wire diameter tolerance should meet the requirements, and the material should meet the requirements. 
      2. Inspection of weaving accuracy. It is divided into 3 levels: first-level accuracy, the mesh limit deviation cannot exceed 6%; second-level accuracy does not exceed 9%; third-level accuracy does not exceed 12%; it is mainly the inspection of the arithmetic mean of the mesh and the inspection of the large mesh size. 
      3. Inspection of weaving quality. It is impossible for metal wire mesh to have no manufacturing defects in the production process. Under normal circumstances, metal mesh delivered in rolls is not allowed to have major defects, a small number of important defects are allowed, and a certain number of general defects are allowed. 
      Major defects mainly refer to: 
    (1) The warp and weft are not firmly interwoven. When rubbing the warp and weft up and down with the fingers of both hands, there is obvious loosening and displacement of the warp and weft. 
    (2) Severe curling, the mesh size is greater than or equal to 0.18mm, and the natural curling diameter of the 1m long mesh is less than 80mm; the mesh size is less than 0.18mm, and the natural bending diameter of the 1m long mesh is less than 60mm, which should be judged as unqualified; 
    (3) The mesh is seriously skewed, and the warp and weft on the mesh width are not vertical by more than 4 degrees; 
    (4) There are multiple creases in a large area; 
    (5) The radial mesh size is too large to be within the tolerance; 
    (6) The density exceeds the tolerance in a large area; 
    (7) The weft is running in a large area, and the mesh surface is uneven; 
    (8) The diameters of the warp and weft are seriously out of tolerance; 
    (9) Holes, half-cut wefts, and large forks; 
   (10) Large areas of serious color unevenness and severe mechanical damage.

1. Chromium (Cr) is the main factor that determines the corrosion resistance of stainless steel. Chromium can easily form a dense passivation film in an oxidizing medium. This passivation film is stable and complete, firmly combined with the base metal, and completely separates the base from the medium, thereby improving the corrosion resistance of the alloy. 11% is the lowest limit of chromium content in stainless steel. Steel with a chromium content of less than 11% is generally not called stainless steel.
2. Nickel (Ni) is an excellent corrosion-resistant material. After adding nickel to stainless steel, the structure changes significantly. As the content of nickel in stainless steel increases, the corrosion resistance, high temperature resistance and processing resistance of stainless steel will be enhanced.
3. Molybdenum (Mo) can improve the corrosion resistance of stainless steel. Adding molybdenum to stainless steel can further passivate the surface of stainless steel, thereby further improving the corrosion resistance of stainless steel. Molybdenum cannot form a precipitate in stainless steel, thereby improving the tensile strength of stainless steel.
4. Carbon (C) is represented by "0" in stainless steel. An increase in carbon content will reduce the corrosion resistance of stainless steel, but it can increase the hardness of stainless steel.
There are many types of stainless steel grades. Austenitic stainless steel includes 302 (1Cr8Ni9), 304 (0Cr18Ni9), 304L (00Cr19Ni10), 316 (0Cr17Ni12Mo2), 316L (00Cr17Ni14Mo2), 321 (0Cr18Ni9Ti) and other grades. From the content of chromium (Cr), nickel (Ni), and molybdenum (Mo), 304 and 304L wires have good comprehensive performance and corrosion resistance, and are currently the most used wires for stainless steel mesh; 316 and 316L contain high nickel and molybdenum, which are most suitable for drawing fine wires, and have good corrosion resistance and high temperature resistance. High mesh dense mesh is none other than her.
Introduction to the grades, materials and standards of stainless steel wire mesh raw materials
1. Chromium (Cr) is the main factor that determines the corrosion resistance of stainless steel. Chromium is very easy to form a dense passivation film in an oxidizing medium. This passive film is stable and complete, firmly bonded to the base metal, completely separating the base from the medium, thereby improving the corrosion resistance of the alloy. 11% is the lowest limit of chromium content in stainless steel. Steel with a chromium content below 11% is generally not called stainless steel. 
2. Nickel (Ni) is an excellent corrosion-resistant material. After adding nickel to stainless steel, the organization changes significantly. The higher the content of nickel in stainless steel, the corrosion resistance, high temperature resistance and processing resistance of stainless steel will be enhanced.
3. Molybdenum (Mo) can improve the corrosion resistance of stainless steel. Adding molybdenum to stainless steel can further passivate the surface of stainless steel, thereby further improving the corrosion resistance of stainless steel. Molybdenum cannot form a precipitate in stainless steel, thereby improving the tensile strength of stainless steel. 
4. Carbon (C) is represented by "0" in stainless steel. An increase in carbon content will reduce the corrosion resistance of stainless steel, but it can increase the hardness of stainless steel. There are 
many types of stainless steel grades, and austenitic stainless steel includes 302 (1Cr8Ni9), 304 (0Cr18Ni9), 304L (00Cr19Ni10), 316 (0Cr17Ni12Mo2), 316L (00Cr17Ni14Mo2), 321 (0Cr18Ni9Ti) and other grades. Judging from the content of chromium (Cr), nickel (Ni), and molybdenum (Mo), 304 and 304L wires have good comprehensive performance and corrosion resistance, and are currently the most used wires for stainless steel mesh; 316 and 316L contain high nickel and molybdenum, are most suitable for drawing fine wires, and have good corrosion resistance and high temperature resistance, and are the best choice for high-mesh dense mesh.