| Feature | 304 Stainless Steel | 316 Stainless Steel |
|---|---|---|
| Composition | ~18-20% Chromium, 8-10.5% Nickel | ~16-18% Chromium, 10-14% Nickel, 2-3% Molybdenum |
| Corrosion Resistance | Good resistance to oxidation and corrosion, but less resistant to chlorides and saline environments | Superior corrosion resistance, especially against chlorides, marine environments, and acids due to molybdenum addition |
| Cost | Generally less expensive | More expensive due to molybdenum content |
| Applications | Kitchen equipment, food processing, architectural trim, chemical containers | Marine equipment, chemical processing, medical devices, and environments exposed to saltwater or harsh chemicals |
| Mechanical Properties | Good strength and ductility | Similar strength, slightly better performance in harsh environments |
| Magnetic Properties | Non-magnetic in annealed condition | Also generally non-magnetic, but slight magnetism possible after cold working |
Summary:
Choose 304 for general-purpose use with good corrosion resistance at a lower cost.
Choose 316 when you need higher corrosion resistance, especially in chloride or marine environments.
