With 904l steel sheets highly alloyed chemistry — 25% nickel and 4.5% molybdenum, 904l steel sheet provides good chloride stress corrosion cracking resistance, pitting and general corrosion resistance superior to 316L and 317L molybdenum enhanced stainless steels.
Fractional distillation of tall oil often needs better 904l steel sheet material than 316L or even the more frequently used 317LMN. In these hot concentrated caustic solutions, the corrosion resistance is mainly determined by the nickel content of the material. With a nickel content of 25%, 904L has proven to be a good alternative to most conventional stainless steels.
Corrosion rates in fatty acid column for the distillation of tall oil at 253°C
| ALLOY | Corrosion Rate, mm/year |
|---|---|
| 904L | 0.056 |
| 254 SMO® | 0.01 |
Metallurgical Processing — pickling equipment using sulfuric acid
Oil and Gas Production — offshore process equipment
Pharmaceutical Industry — process equipment
Pulp and Paper — processing equipment
Seawater and Brackish Water — condensers, heat exchangers and piping systems
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