![]() Where high temperature strength is important, higher carbon values are required. Grade 304L is more resistant to carbide precipitation and can be used in the above temperature range. ![]() Continuous use of 304 in the 425-860 oC range is not recommended if subsequent exposure to room temperature aqueous environments is anticipated, but it often performs well in temperatures fluctuating above and below this range. Heat resistanceģ04 has good oxidation resistance in intermittent service to 870 oC and in continuous service to 925 oC. Descriptions of these mechanisms may be found in ASSDA's Reference Manual. However, it can be successful in warm chloride environments where exposure is intermittent and cleaning is a regular event (such as saucepans and some yacht fittings). In warm chloride environments, 304 is subject to pitting and crevice corrosion and to stress corrosion cracking when subjected to tensile stresses beyond about 50 oC. It is also resistant to most food processing environments, can be readily cleaned, and resists organic chemicals, dye stuffs and a wide variety of inorganic chemicals. It resists ordinary rusting in most architectural applications. Grade 304 has excellent corrosion resistance in a wide range of media. 304L and 304H are sometimes stocked as standard 304 (test certificates will confirm compliance with the 'L' or 'H' specification). Specifications for some other products may vary slightly from these vales.īoth 304L and 304H are available in plate and pipe, but 304H is less readily available ex-stock. These limits are specified in ASTM A240 for plate, sheet and strip. Single values are maximum specification limits.Ģ. ![]() Table 1: Composition of 304 and related gradesġ. This grade is not designed for applications where sensitisation corrosion could be expected. Grade 304H (see Table 1) has a higher carbon content than 304L, which increases the strength (particularly at temperatures above about 500 oC). Grade 304L (see Table 1) is a low carbon 304 often used to avoid possible sensitisation corrosion in welded components. ![]() Chances are some of your cutlery (look for the telltale 18/8 or 18/10 designation), your saucepans and your sink are 304 stainless. You already have substantial experience of 304 and its properties on which to draw. However, an understanding of the attributes of 304 provides an excellent base for comparing members of the austenitic family of stainless steels and a practical base for determining the appropriateness of stainless steel in a given application. It accounts for more than 50% of all stainless steel produced, represents between 50 and 60% of Australia's consumption of stainless materials and finds applications in almost every industry.ģ04 is not the only stainless steel and is not appropriate in every application. UNS S30400 (grade 304) is the greatest stainless success story. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |