Which Types of Stainless Steel Doors are Commonly Used
Stainless steel doors are made of various kinds of materials, and normally are 304/304L/316/316L/321/310S 410/420/420J1/420J2/430/ 201/202
How to identify the quality of different types of stainless steel doors materials is not determined by an individual, but has to be analyzed through chemical methods.
Such as the identification of 400 and 300 series can be done by magnetic method, 400 series material is generally magnetic but 300 series is not. Also 301 series has good ductility which can be used in finished products. This series material can also be rapidly hardened by machining, So it's weldability, abrasion resistance and fatigue strength is better than 304 series materials.
Model 302 has the same corrosion resistance as 304 series, since the carbon content is relatively high and thus the strength is better.
Model 303 by adding a small amount of sulfur, phosphorus makes it more earier to be cut than 304.
Model 304 is a commonly used material, such as 18/8 stainless steel, GB model number is 0Cr18Ni9.
Model 309 has better temperature resistance than model 304.
After model 304, model 316 is the second widely used stainless steel series, commonly used in food industry and surgical equipment. The addition of molybdenum makes it possible to obtain an anti-erosion special structure. Because it has a better resistance to chloride erosion than model 304, 316 is also used in broad industry. SS316 is usually used for nuclear fuel recovery devices. 18/10 grade stainless steel is also considered in line with this application level. Model 321 is similar to 304 except for the addition of titanium to reduce the risk of corrosion of the material weld.
400 series, ferritic and martensitic stainless steel.
Model 408 has good heat resistance, weak erosion resistance, 11% Cr, 8% Ni.
Model 409 the cheapest model (Anglo-American), usually used for automobile exhaust pipe, is a ferritic stainless steel (chrome steel).
Model 410 martensite (high-strength chrome steel), wear resistance, corrosion resistance is poor.
Model 416 adds sulfur to improve the processing performance of the material.
Model 420 cutting tool grade, martensitic steel, similar to Brinell high chromium steel the earliest stainless steel. Also used in surgical tools, can be cut brightly.
Model 430 Ferritic stainless steel, decorative,used for automotive accessories. Good formability, but the temperature and corrosion resistance is worse.
Model 440 high-strength cutting tool steel, carbon is slightly higher, through appropriate heat treatment can be obtained after a higher yield strength, hardness can reach 58HRC, belonging to the hardest of the stainless steel. The most common application is the "razor blade". There are three commonly used models: 440A, 440B, 440C, in addition to 440F (easy processing type).