1.4410 vs. 316 stainless steel: What are the differences?
Jan 19, 2026
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When choosing stainless steel for marine, chemical, energy, or structural applications, buyers often compare EN 1.4410 (Duplex 2507) with 316 stainless steel.Although both offer corrosion resistance, their performance, cost efficiency, and application scope differ significantly.
This guide provides a clear, data-driven comparison to help engineers and procurement teams make the right decision.
What is en 1.4410 material?
EN 1.4410 is a super duplex stainless steel, also known as Alloy 2507, UNS S32750, or F53, possessing exceptional strength and excellent corrosion resistance, particularly in chloride-rich environments (such as seawater). It is ideally suited for demanding applications in industries such as oil and gas, chemical processing, and marine engineering. Its strength is twice that of standard austenitic stainless steel 316.
What is 316 grade stainless steel?
316 grade stainless steel is a popular, corrosion-resistant austenitic steel, known as "marine-grade," containing chromium, nickel, and molybdenum, which gives it superior resistance to chlorides, saltwater, and chemicals compared to 304 stainless steel, making it ideal for marine, medical, food processing, and harsh chemical environments.
1.4410 vs. 316 stainless steel: Material Overview
| Grade | Standard | UNS | Type |
|---|---|---|---|
| 1.4410 | EN 10088 | S32750 | Super Duplex Stainless Steel |
| 316 | ASTM / AISI | S31600 | Austenitic Stainless Steel |
1.4410 vs. 316 stainless steel: Chemical Composition
| Element (%) | 1.4410 (S32750) | 316 (S31600) |
|---|---|---|
| Chromium (Cr) | 24.0 – 26.0 | 16.0 – 18.0 |
| Nickel (Ni) | 6.0 – 8.0 | 10.0 – 14.0 |
| Molybdenum (Mo) | 3.0 – 5.0 | 2.0 – 3.0 |
| Nitrogen (N) | 0.24 – 0.32 | ≤ 0.10 |
| Carbon (C) | ≤ 0.03 | ≤ 0.08 |
| PREN* | ≥ 40 | ≈ 23–25 |
1.4410 vs. 316 stainless steel: Mechanical Properties
| Property | 1.4410 | 316 |
|---|---|---|
| Yield Strength (MPa) | ≥ 550 | ≥ 205 |
| Tensile Strength (MPa) | 750 – 950 | 515 – 690 |
| Elongation (%) | ≥ 15 | ≥ 40 |
| Hardness (HB) | ≤ 310 | ≤ 217 |
1.4410 vs. 316 stainless steel: Corrosion Resistance
In terms of corrosion resistance, 1.4410 (UNS S32750 super duplex stainless steel) significantly outperforms 316 stainless steel, especially in chloride-containing environments. The pitting resistance equivalent number (PREN) of 1.4410 is typically ≥ 40, while that of 316 is only 23-25, indicating that 1.4410 has higher resistance to pitting and crevice corrosion.
| Environment | 1.4410 | 316 |
|---|---|---|
| Chloride seawater | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Pitting corrosion | Excellent | Moderate |
| Crevice corrosion | Excellent | Limited |
| Stress corrosion cracking | Very high resistance | Prone |
| Acidic chemicals | Excellent | Good |
Laboratory and field data show that 316 stainless steel may experience localized corrosion when chloride concentrations exceed 1000 ppm, while 1.4410 can reliably withstand seawater corrosion (chloride concentration approximately 19000 ppm) under normal operating conditions without pitting. Furthermore, the duplex microstructure of 1.4410 gives it excellent resistance to stress corrosion cracking (SCC), whereas 316 stainless steel is relatively susceptible to stress corrosion cracking at temperatures above 50-60°C.
1.4410 vs. 316 stainless steel: Applications
1.4410 is typically used in offshore and seawater applications where chloride levels reach ~19,000 ppm, while 316 stainless steel is mainly applied in general industrial and marine environments with chloride concentrations usually below 1,000 ppm.
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