443 Stainless Steel And 304 Stainless Steel Difference

443 stainless steel and 304 stainless steel difference

443 stainless steel is a ferritic stainless steel, sometimes used to replace 304 stainless steel, the steel rust resistance and processing performance and 304 stainless steel is similar, is now mainly active in electrical appliances, kitchen equipment, elevators, oven production and other fields.

443 Excellent corrosion resistance of stainless steel

443 stainless steel increases the chromium content to 21%, and the corrosion resistance is as good as 304 stainless steel, followed by the addition of titanium to play a stabilizing role, and also maintains good corrosion resistance after welding of the steel.

The characteristics of the steel are better than ordinary ferritic stainless steel, because by increasing the chromium content in 443 stainless steel, reducing the carbon content, adding titanium elements to improve the corrosion resistance of the steel, pitting resistance is improved.

In addition, the increase of chromium content can also increase the electrode potential of the stainless steel matrix, and at the same time, titanium elements in stainless steel will preferentially form stable compounds with carbon elements, thereby inhibiting the combination of carbon and chromium in stainless steel, in order to inhibit the occurrence of chrome-poor points, and ultimately improve the corrosion resistance of the steel itself.

In addition, it can improve the thermal service life of stainless steel itself, because titanium will preferentially form carbides, which will inhibit the enrichment of carbon elements to the grain boundaries of stainless steel under hot conditions, thereby improving the thermal service life of stainless steel, and also enhance the resistance of stainless steel to intercrystalline corrosion, and ultimately help improve the thermal stability of stainless steel.

443 Chemical composition and mechanical properties of stainless steel
The carbon element in 443 stainless steel is 0.009%, the chromium element is about 21.02%, the titanium element is about 0.18%, the yield strength of the steel body itself is σ0.2≥250Mpa, the tensile strength σb≥450Mpa, and the elongation of El≥25.

443 stainless steel price advantage and its stability
Since no nickel is added to the chemical forming element of 443 stainless steel, the price is cheaper than 304 stainless steel. And because there is no need to add nickel and molybdenum, the rise and fall of these two metals will not affect 443 stainless steel.

443 stainless steel thermal conductivity advantages
The thermal conductivity of 443 stainless steel is about 30% higher than that of 304 stainless steel, because it is used in the field of cooking equipment manufacturing, more time and energy can be saved, and because of its good magnetic permeability, the use of induction stoves can better show the advantages of the material, and the application effect of the material is better.