Type 316 contains slightly more than 304 types of nickel, and contains 2% 3% of molybdenum, corrosion resistance better than the 304 model, in particular, tend to cause pitting corrosion in chloride media. Because it is durable and sulfuric acid compounds.,316-type has been developed as a sulfite pulp machine. Moreover, its usage has been extended to the processing industry to deal with many chemicals.