EN 1.4571 vs.1.4541：What's the difference?
EN 1.4571 vs. 1.4541: What's the Difference?
When selecting stainless steel for high-temperature or corrosive environments, EN 1.4571 (AISI 316Ti) and EN 1.4541 (AISI 321) are two commonly used titanium-stabilized austenitic stainless steels. While they may seem similar at first glance, each offers distinct advantages depending on the application. This guide compares EN 1.4571 vs. EN 1.4541 in terms of chemical composition, corrosion resistance, mechanical properties, and industrial uses.
Keywords:
316Ti vs 321 stainless steel
1.4571 vs 1.4541
stainless steel with titanium
marine grade vs high temperature steel
1.4571 vs 1.4541 stainless steel
| Feature | EN 1.4571 (316Ti) | EN 1.4541 (321) |
|---|---|---|
| AISI Equivalent | 316Ti | 321 |
| Main Alloying Elements | Cr-Ni-Mo-Ti | Cr-Ni-Ti |
| Molybdenum Content (Mo) | 2.0–2.5% | None |
| Corrosion Resistance | High (especially chloride) | Moderate |
| Temperature Resistance | Up to 600–650°C | Up to 870°C (dry air) |
| Typical Applications | Marine, chemical, pharma | Exhausts, heat exchangers |
1.4571 vs 1.4541: Chemical Composition
| Element | 1.4571 (316Ti) | 1.4541 (321) |
|---|---|---|
| C (max) | 0.08% | 0.08% |
| Cr | 16.5–18.5% | 17.0–19.0% |
| Ni | 10.5–13.0% | 9.0–12.0% |
| Mo | 2.0–2.5% | – |
| Ti | Stabilized | Stabilized |
1.4571 vs 1.4541 stainless steel Corrosion Resistance Comparison
EN 1.4571 (316Ti) includes molybdenum, providing excellent resistance to chloride-induced pitting and crevice corrosion, making it ideal for marine environments, salt spray zones, and acidic chemical media.
EN 1.4541 (321) offers good general corrosion resistance but lacks Mo, making it less effective in chlorides. However, it performs better than 304 in high-temperature oxidation.
✅ If your project involves saltwater or acidic environments, 316Ti (1.4571) is the superior choice.
1.4571 vs 1.4541 stainless steel Temperature Resistance
EN 1.4541 can handle up to 870°C in dry air, commonly used in exhaust systems, aerospace components, and heat exchangers.
EN 1.4571 performs well up to 650°C, with better creep resistance than 316L, making it suitable for moderate high-temperature pressure systems.
1.4571 vs 1.4541 stainless steel Machinability and Weldability
Both grades offer good weldability, but post-weld heat treatment is not typically required due to titanium stabilization. However:
1.4571 may be slightly harder to machine due to molybdenum.
ER316Ti and ER321 welding wires are recommended respectively.
Which is better for marine applications?
👉 1.4571 (316Ti) is better due to Mo-enhanced corrosion resistance.
Can 1.4541 be used in high-temperature exhaust?
👉 Yes, it offers superior oxidation resistance in dry heat up to 870°C.
Are they interchangeable?
👉 Not always. Choose based on environment - 316Ti for corrosion, 321 for heat.
Are both available in seamless pipes and tubes?
👉 Yes. GNEE offers both grades in ASTM A312/A213 compliant seamless or welded pipe forms.
