Stainless Steel is an extremely durable material that is corrosion, fire, heat and impact resistant. 304 Grade Stainless Steel is the most common grade of stainless steel. 304 Grade contains 18% chromium and 8% nickel. 316 Grade contains 16% chromium, 10% nickel and 2% molybdenum. The addition of molybdenum makes 316 Grade Stainless Steel resistant t to corrosion of chlorides like sea water and de-icing salts.