304 vs 316 Stainless Steel: Key Differences and Best Project Uses
304 and 316 stainless steels are popular austenitic grades, but their differences in composition and performance make one better suited for specific projects. Choosing correctly balances cost, durability, and corrosion resistance, especially in harsh environments like coastal UAE areas. Chemical Composition Both grades feature high chromium for basic corrosion protection, but 316 adds molybdenum for superior pitting resistance. Element 304 (%) 316 (%) Chromium 18.0-20.0 16.0-18.0 Nickel 8.0-10.5 10.0-14.0 Molybdenum None 2.0-3.0 This molybdenum boost in 316 enhances resistance to chlorides and acids. Mechanical Properties Strengths are similar, with 304 offering better ductility for forming and 316 providing slight edges in tensile strength and hardness. Property 304 316 Tensile Strength 540-750 MPa 530-680 MPa ...