Jianwei 304 Stainless Steel Large Thick Square Flat Mat for Eye Screw Wall Lattice M3M4M5M8M10M12M20

At least 5 characters

add shadow characters




add shadow characters





 
    
 
 
  
   
     if there is positive and negative tolerance, those who care about it very much, such as nut, flat ring, retaining ring and other sizes: the diameter (thickness) of the matching screws shall prevail
    unit: mm  
 
 
  specifications and models 
  inner diameter 
  outer diameter 
  thickness 
 
 
  M8 * 40*3 
  8  
 40 
  3  
 
 
  M10 * 40*2.5 
 10 
 40 
 2.5 
 
 
  m8 * 30*2.5 
 12 
 30 
 2.5 
 
 
  M14 * 40*3 
 14 
 40 
  3  
 
 
  M16 * 40*4 
 16 
 40 
  4  
 





add shadow characters






 
   chemical composition,%,max
 
 
   group
   C
   Si
   Mn
   P
   S
   Cr
   Mo
   Ni
   Cu
   characteristics
 
 
  304-A2
  0.1
  1
  2
  0.05
  0.03
  15-20
   
  8-19
  4
   the work hardening rate is moderate, and it is suitable for general cold room processing and stretching. The cold working performance is good, and it is widely used in external hexagonal screws, nuts and washer products.
 
 
  316-A4
  0.08
  1
  2
  0.045
  0.03
  16-18.5
  2-3
  10-15
  1
   with molybdenum, the corrosion resistance is stronger than 304, which is especially suitable for seawater and chemical medium, and has more corrosion resistance and hole corrosion resistance.
 
 
   Note:1) If the nickel content is less than 8%, the minimum content of manganese must be 5% 2) when the nickel content is greater than 8%, the minimum content of copper is not limited. 3) If the chromium content is less than 17%, the minimum content of nickel is 12% 4) for the stainless steel with the maximum carbon content of 0.03%, the highest nitrogen content can reach 0.22 5) for products with larger diameter, in order to achieve the specified mechanical properties, there may be a higher carbon content in the manufacturer's instructions, but for martensite steel, it should not exceed 0.12%
 
 




 
   mechanical properties
 
 
   category
   group
   performance grade
   screw diameter
   tensile strength mpa/mm 2
  the non-specific column elongation should be mpa/mm 2
  elongation after breaking mpa/mm 2
 
 
  martensite
   a2,A4
  50
  ≤39
  500
  210
  0.6d
 
 
  70
  ≤24
  700
  450
  0.4d
 
 
  80
  ≤24
  800
  600
  0.3d
 







  question 1
 1. Why does stainless steel also have magnetism?304 stainless steel belongs to the stainless steel, and in the process of cold processing, some or a little of the stainless steel is transformed into martensite, and martensite is magnetic, so 304 stainless steel is non-magnetic or micro-magnetic. For details, you can query why 304 stainless steel contains magnetic.


  Question 2
 2. How to identify authentic 304 stainless steel products?① support 304 stainless steel special detection potion detection, if it does not change color, it will be authentic 304 stainless steel. ② support chemical composition analysis and spectral analysis. ③ support Smoke testing and simulate the actual use environment.


  Question 3
 3. What kind of stainless steel are the most commonly used?① 201 stainless steel, suitable for use in dry environment, easy to rust when exposed to water. ② 304 stainless steel, outdoor or humid environment, strong corrosion resistance and acid resistance. ③ 316 stainless steel with molybdenum is more corrosion resistance and hole corrosion resistance, especially suitable for seawater and chemical medium.


 
   
     Since 2003, the raw material of stainless steel has risen all over the world, and a kind of low-nickel stainless steel (containing nickel Ni1.5-4.5%) with low price and economical stainless steel has appeared in the domestic market, which is about 304-15% lower than that of 40% stainless steel, the ability of anti-corrosion and rust prevention is relatively low, while our products are all stainless steel products of 304 or 316.