Compatibility Rating
Why is SS 316 resistant to Seawater?
SS 316 shows excellent resistance to Seawater due to its molybdenum content providing superior resistance to chlorides and corrosive chemicals compared to 304.
⚠️ When NOT to use SS 316
Avoid using Stainless Steel 316 with hydrochloric acid, hot sulfuric acid, and reducing environments. Best general-purpose stainless steel for chemical exposure.
Comparison Table — All Materials for Seawater
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PTFE | A | A |
| PVDF | A | A |
| FEP | A | A |
| ECTFE/ETFE | A | A |
| EPDM | A | A |
| Viton (FPM) | A | A |
| NBR | A | A |
| Silicone | NR | NR |
| SS 316 | A | NR |
| SS 304 | A | NR |
| Aluminium | C | D |
| PVC Rigid | A | C |
| PVC Flexible | A | C |
| PMP | NR | NR |
| Polystyrene | A | A |
| SAN | A | A |
| Polycarbonate | A | A |
| PETG | A | A |
| Acetal (POM) | A | A |
| Nylon (PA) | A | NR |
| Polysulfone | NR | NR |
A=Excellent · B=Good · C=Fair · D=Poor · NR=No Data
🌡️ Temperature Note
Good resistance at both 20°C and 50°C. Maximum service temperature for this material is 800°C — above this, degradation risk increases significantly.
🔄 Better Alternative?
Consider: Hastelloy or titanium for extreme corrosion. View all materials for Seawater →
FAQ
Is Stainless Steel 316 resistant to Seawater?
Stainless Steel 316 has Excellent (A) resistance to Seawater at 20°C. Excellent resistance - recommended for continuous use.
Can I store Seawater in Stainless Steel 316 containers?
Yes, Stainless Steel 316 is rated A (Excellent) for Seawater.