Stainless Steel 316 (SS 316) – Austenitic Stainless Steel for Corrosive Environments SS 316 is a molybdenum-bearing austenitic stainless steel known for its enhanced corrosion resistance, especially against chlorides and marine environments. It contains 16–18% chromium, 10–14% nickel, and 2–3% molybdenum, making it more durable in chemical, acidic, and saltwater conditions compared to SS 304. Its superior pitting resistance, excellent formability, and non-magnetic nature in the annealed state make SS 316 a preferred choice for chemical processing equipment, marine components, pharmaceutical machinery, and food-grade applications. Key Features: Superior corrosion resistance, especially against chlorides and acids Enhanced pitting and crevice corrosion resistance due to molybdenum Maintains mechanical strength at elevated temperatures Excellent weldability and fabrication characteristics Non-magnetic in annealed condition Typical Chemical Composition: Element Content (%) Chromium 16.0 – 18.0 Nickel 10.0 – 14.0 Molybdenum 2.0 – 3.0 Carbon ≤ 0.08 Manganese ≤ 2.00 Silicon ≤ 1.00 Phosphorus ≤ 0.045 Sulfur ≤ 0.030 Mechanical Properties: Property SS 316 Yield Strength ≥ 205 MPa Tensile Strength ≥ 515 MPa Elongation ≥ 40% Hardness (Brinell) ≤ 217 HB Service Temp. Range Up to 870°C Common Applications: Marine hardware and coastal structures Food and beverage processing equipment Chemical storage tanks and pipelines Medical and pharmaceutical instruments Heat exchangers, reactors, and oil refining units Summary: SS 316 is widely used in industries where superior resistance to corrosion and harsh chemicals is essential. It performs exceptionally well in marine, chloride-exposed, and high-humidity environments, making it a reliable choice for critical applications.