1, 316 stainless steel and 304 stainless steel are food grade, but 316 stainless steel used in the production of medical equipment and tools, 304 is mainly used as a home container, used in the production of medical equipment and tools 316 stainless steel when the kettle will be better.
2, 316 corrosion resistance is stronger, 316 in 304 on the basis of an increase in corrosion resistance of molybdenum, so when encountered with higher levels of chloride ions 316 corrosion resistance is better.