As we know that stainless steel is resistant to high temperature, in theory, the use temperature of 304 stainless steel plate is 190~860 degrees Celsius, but in actual, the use temperature of 304 stainless steel plate is not as high as 860 degrees Celsius. Why does this happened? In fact, the use temperature of 304 stainless steel pate is cannot be kept in between 450 and 860 degrees Celsius. It because when 304 stainless steel reaches 450 degrees will have a critical point. When get the point the stainless steel will dilute the chromium around the carbon element which will form chromium carbide. The chromium-depleted area appears where the diluted chromium originally exists that would change the performance and material of the stainless steel. In addition, the temperature of 450 degrees Celsius with the yield force will turn austenite into Martensite. Therefore, 304 stainless steel plate is should used between 190~450 degrees Celsius. HCADTO Stainless Steel Co., Ltd. the Stainless Steel Division of ADTO GROUP, specializes in manufacturing stainless steel pipes, stainless steel angle bar, flat bar, round bar, square bar, hexagonal bar and channel bar in various grades and sizes. Our years of production experience and manufacturing facilities will ensure the good quality and competitive duration of our products.