304 stainless steel is a commonly used stainless steel material. The rust -proof resistance is stronger than the 200 series of stainless steel materials. High temperature resistance is also better. Generally, the temperature limit is less than 650 ° C. 304 stainless steel has excellent stainless corrosion resistance and better corrosion resistance. For oxidative acids, in the experiment, the 304 stainless steel has a strong corrosion resistance among the nitric acid below the boiling temperature of the concentration ≤65%. It also has good corrosion resistance to alkaline solutions and most organic acids and inorganic acids.

The most important elements in 304 are NI and C, but not only limited to these two elements. The specific requirements shall be stipulated by the product standard. The common judgment of the industry believes that as long as the Ni content is greater than 8%and the CR content is greater than 18%, it can be considered as 304 stainless steel. Under normal circumstances, nickel-containing nickel-containing nickel steel can be used at low temperature at -100 ° C; nickel-containing nickel-containing nickel steel can be used at -196 ° C at ultra-low temperature.

Therefore, it can be known that 304 stainless steel can be used at least at at least low temperature at -196 ° C, and if the Ni content is high, the limit is to -650 ° C.