SS316 is an alloy of chromium – nickel with molybdenum which improves the corrosion resistance properties. The molybdenum in the material also elevates its strength. SS 316 / 316L both have almost the same corrosion resistance properties, the only difference is SS 316L has a low carbon stainless steel content.
SS 316 / 316L has excellent corrosion resistance to:
SS316 / 316L has poor resistance to:
Applications of SS 316 / 316L is mainly in chemical & petrochemical industry, food processing, pharmaceutical equipment, & also in marine & architectural applications.
Chemical Composition:
| Element | Percentage |
|---|---|
| Iron ( Fe ) | 60% - 67% |
| Nickel ( Ni ) | 9% - 12% |
| Chromium ( Cr ) | 18% - 21% |
| Molybdenum ( Mo ) | 2% - 3% |
| Carbon ( C ) | 0.08% |
| Other: | |
| Silicon ( Si ) | 2% |
| Manganese ( Mn ) | 1.5% |
Corrosion Rating:
RATINGS - 0:Unsuitable 1:Poor to Fair 2:Fair 3:Fair to good 4:Good 5:Good to Excellent 6:Normally Excellent
| Materials | Non-oxidizing or reducing media | Liquids | Gases | |||||||
| Acid solutions excluding Hydrochloric, phosphoric, sulfuric | Neutral solutions, e.g. many Non-oxidizing salt solutions, chlorides, sulfates | Alkaline solutions | Oxidizing Media | Halogen & derivatives | ||||||
| Caustic & mild alkalis, excluding ammonium hydroxide | Ammonium hydroxide & amines | Acid solutions, e.g. nitric | Neutral or alkaline solutions e.g. per sulfates, peroxides, chromates | Pitting media, acid ferric chloride solutions | Halogen | Hydrogen halides, dry, e.g., dry, hydrogen chloride | ||||
| Moist, e.g. chlorine below dew point | Dry, e.g. fluorine above dew point | |||||||||
| SS 316 | 4 | 5 | 5 | 6 | 5 | 6 | 1 | 0 | 3 | 2 |
Note: Maximum Design Temperature shall depend on the corresponding pressure requirement.