Steel by corrosive medium and equivalence table
Enter the medium the part works in, the concentration and the temperature. The table ranks the steels and alloys from best resistance down to "not recommended", with the standard equivalents.
1You enter
Aeration and oxidizing ions (Fe³⁺, Cu²⁺) worsen nickel-molybdenum alloys (B-2) and Monel; chlorides worsen stainless steels. B-2 values assume aerated acid; deaerated and free of Fe³⁺/Cu²⁺ it goes much further.
Source: Alleima, corrosion table: sulphuric acid; Haynes, HASTELLOY B-3 (datasheet), 2024
2Result
- Most economical option with very good resistance
- Duplex 2205 / F60 / S32205
- Alloys with good or very good resistance
- 10 of 15
Caution: information based on various studies and literature. For a reliable answer, consult Dustre's engineering team. Small changes in the environment, such as aeration and the influence of other elements, among others, can completely change the analysis.
Resistance by alloy, with equivalents
| Alloy | Resistance | UNS | W.Nr. | EN | Other names | Options |
|---|---|---|---|---|---|---|
| Duplex 2205 / F60 / S32205 | Very good | S32205 / S31803 | 1.4462 | X2CrNiMoN22-5-3 | F60, SAF 2205 (F51 = S31803) | |
| 904L stainless steel | Very good | N08904 | 1.4539 | X1NiCrMoCu25-20-5 | Alloy 904L, F904L | |
| Super duplex 2507 / F53 / S32750 | Very good | S32750 | 1.4410 | X2CrNiMoN25-7-4 | F53, SAF 2507 | |
| 254 SMO / F44 | Very good | S31254 | 1.4547 | X1CrNiMoCuN20-18-7 | F44, 254 SMO | |
| Alloy 20 (Carpenter 20) | Very good | N08020 | 2.4660 | NiCr20CuMo | Carpenter 20Cb-3, B462 N08020 | |
| Inconel 625 / Alloy 625 | Very good | N06625 | 2.4856 | NiCr22Mo9Nb | Alloy 625, B564 N06625 | |
| Hastelloy C-276 | Very good | N10276 | 2.4819 | NiMo16Cr15W | Alloy C-276 | |
| Hastelloy B-2 | Very good | N10665 | 2.4617 | NiMo28 | Alloy B-2 | |
| 317L stainless steel | Good | S31703 | 1.4438 | X2CrNiMo18-15-4 | AISI 317L, F317L | |
| Monel 400 | Good | N04400 | 2.4360 | NiCu30Fe | Alloy 400 | |
| 316 / 316L stainless | Limited | S31603 | 1.4404 | X2CrNiMo17-12-2 | AISI 316L, F316L | |
| Nickel 200 | Limited | N02200 | 2.4066 | Ni99,2 | Alloy 200 | |
| ASTM A105 – Forged carbon steel for piping | Not recommended | K03504 | 1.0460 | C22.8 | A105 / A350 LF2 | |
| 304L stainless steel | Not recommended | S30403 | 1.4307 | X2CrNi18-9 | AISI 304L, F304L | |
| Titanium Grade 2 | Not recommended | R50400 | 3.7035 | Ti 2 | ASTM B348 Gr2, CP Ti |
* Guidance only, based on published isocorrosion curves for pure media and reviewed in Oct 2026 medium by medium against technical literature (Nickel Institute, AMPP/NACE, TIMET, Haynes, Alleima, conference papers and journals); the source for each medium appears below the note. Within each concentration range the most aggressive condition applies. Contaminants (chlorides, fluorides, oxidizers), aeration, velocity, crevices and welds change the result. Confirm with Dustre engineering or by testing in the real medium before specifying.
Frequently asked questions
How do I read the rating?
Very good: corrosion below about 0.1 mm/year. Good: up to about 0.5 mm/year, acceptable with corrosion allowance. Limited: only for short use or with monitoring. Not recommended: rapid attack or risk of pitting and cracking.
Does pressure change the material choice?
Little, directly. It matters because it allows operation above the boiling point and because, with dissolved gases (H₂S, CO₂, O₂), it increases aggressiveness. Enter the actual operating temperature.
What is a steel equivalence table?
It is the correspondence between the designations of the same material in each system: UNS (USA), W.Nr. and EN name (Europe) and trade names. For example, 316L stainless = UNS S31603 = 1.4404 = X2CrNiMo17-12-2.
