Compatibility Rating
At 20°C
Excellent
Excellent resistance - recommended for continuous use
At 50°C
Excellent
Excellent resistance - recommended for continuous use
Why is SS 304 resistant to Boric Acid?
SS 304 shows excellent resistance to Boric Acid due to its chromium content (18%) forming a passive oxide layer resistant to many corrosive environments.
⚠️ When NOT to use SS 304
Avoid using Stainless Steel 304 with chloride-rich environments (seawater, HCl) which cause pitting corrosion. Use 316 grade for chloride exposure.
Comparison Table — All Materials for Boric Acid
| 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 | NR |
| Viton (FPM) | A | A |
| NBR | A | A |
| Silicone | NR | NR |
| SS 316 | A | A |
| SS 304 | A | A |
| Aluminium | A | B |
| PVC Rigid | NR | NR |
| PVC Flexible | NR | NR |
| PMP | NR | NR |
| Polystyrene | NR | NR |
| SAN | NR | NR |
| Polycarbonate | A | A |
| PETG | A | NR |
| Acetal (POM) | B | C |
| Nylon (PA) | C | C |
| 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: SS 316 for chloride environments. View all materials for Boric Acid →
FAQ
Is Stainless Steel 304 resistant to Boric Acid?
Stainless Steel 304 has Excellent (A) resistance to Boric Acid at 20°C.
Can I store Boric Acid in Stainless Steel 304?
Yes, Stainless Steel 304 is rated A for Boric Acid.