Which is better, 316 stainless steel or 304?

316 is an American Standard austenitic stainless steel, the implementation of the standard: ASTM A240/240M-2018

316 stainless steel is commonly used in pulp and paper equipment heat exchangers, dyeing equipment, film processing equipment, pipelines, materials for the exterior of buildings in coastal zones, as well as the bracelet, case, etc. of high-grade watches. Seawater with equipment, chemical, dye, paper, oxalic acid, fertilizer and other production equipment; photographic, food industry, coastal area facilities, ropes, CD rods, bolts, nuts .

It is a molybdenum-containing stainless steel, due to the molybdenum content of the steel, the total performance of the steel is better than the 310 and 304 stainless steel, high temperature conditions, when the concentration of sulfuric acid is less than 15% or higher than 85%, 316L stainless steel has a wide range of uses. 316L stainless steel also has good resistance to chloride corrosion, so it is usually used in marine environments.

316 stainless steel has a maximum carbon content of 0.03, and can be used in applications that cannot be annealed after welding and require maximum corrosion resistance.

The chemical composition of 316 is shown in the following chart: