Selecting between duplex 2205 stainless steel and 316 austenitic stainless steel requires understanding their distinct properties, performance characteristics, and suitability for specific applications. Below is a detailed comparison structured into key categories, with critical data presented in tables for clarity. ‌ 1. MATERIAL COMPOSITION ‌ ‌ Chemical Composition Comparison ‌ Element 2205 (%) 316 (%) Chromium (Cr) 21.0–23.0 16.0–18.0 Nickel (Ni) 4.5–6.5 10.0–14.0 Molybdenum (Mo) 2.5–3.5 2.0–3.0 Nitrogen (N) 0.14–0.20 Not Applicable Iron (Fe) Balance Balance Key Insight : 2205 has higher chromium and molybdenum content but lower nickel. Nitrogen enhances corrosion resistance in 2205. ‌ 2. MECHANICAL PROPERTIES ‌ ‌ Strength and Durability ‌ Property 2205 316 Yield Strength (MPa) 450–550 170–290 Tensile Strength (MPa) 620–880 480–620 Hardness (Brinell) 290 HB 215 HB Elongation (%) 25 40 Key Insight : 2205 offers ‌ 2–3× higher yield strength ‌ than 316, making it ideal for high-s...