Is 1.4410 better than 1.4462?
In industries such as oil & gas, chemical processing, desalination, and marine engineering, choosing the right stainless steel grade is critical for performance and cost efficiency. Two commonly specified grades in aggressive environments are 1.4462 (X2CrNiMoN22-5-3) and 1.4410 (X2CrNiMoN25-7-4)-known as Duplex 2205 and Super Duplex 2507, respectively.
This article answers the question: What is the difference between 1.4462 and 1.4410 stainless steel? We break it down across composition, strength, corrosion resistance, and application.
1.4462 vs.1.4410 stainless steel
What is 1.4462 Stainless Steel?
EN 1.4462, also known as Duplex 2205, is a two-phase stainless steel combining austenitic and ferritic microstructures. It offers high strength, good corrosion resistance, and is widely used in structural and pressure-bearing components exposed to seawater, brine, or acidic environments.
UNS Designation: S31803 / S32205
Typical Composition: ~22% Cr, 5–6% Ni, 3% Mo, 0.15–0.20% N
PREN (Pitting Resistance Equivalent Number): ~34–35
Tensile Strength: ≥ 620 MPa
Key Strength: Balanced performance and cost-effective
What is 1.4410 Stainless Steel?
EN 1.4410, commonly known as Super Duplex 2507, is a super-austenitic-ferritic alloy designed for extremely aggressive environments involving high chloride content and strong oxidizing conditions.
UNS Designation: S32750
Typical Composition: ~25% Cr, 7% Ni, 4% Mo, ~0.3% N
PREN: ≥ 41 (excellent pitting and crevice corrosion resistance)
Tensile Strength: ≥ 800 MPa
Key Strength: Superior corrosion resistance and mechanical strength
1.4462 vs. 1.4410 Stainless Steel: Key Differences
| Property | 1.4462 (Duplex 2205) | 1.4410 (Super Duplex 2507) |
|---|---|---|
| Chromium (Cr) | ~22% | ~25% |
| Nickel (Ni) | ~5–6% | ~7% |
| Molybdenum (Mo) | ~3% | ~4% |
| Nitrogen (N) | ~0.15–0.20% | ~0.3% |
| PREN | 34–35 | ≥ 41 |
| Tensile Strength | ≥ 620 MPa | ≥ 800 MPa |
| Chloride Resistance | High | Very High (WFI, seawater, brine) |
| Cost | Moderate | Higher (≈ 20–30% more) |
| Typical Applications | Heat exchangers, tanks, bridges | Offshore platforms, subsea piping, desalination systems |
1.4462 vs. 1.4410 corrosion resistance
In terms of corrosion resistance, 1.4410 (super duplex 2507) is significantly better than 1.4462 (duplex 2205).
Especially in harsh environments with high chloride concentrations, such as seawater, brines and aggressive chemical solutions. 1.4410 can have a pitting resistance equivalent value (PREN) of 41 or higher, making it extremely resistant to pitting, crevice corrosion and stress corrosion cracking. In contrast, 1.4462 typically has a PREN of around 34-35, which is adequate for moderate chloride environments, but may not provide long-term reliability in extreme offshore or desalination conditions.
1.4462 and 1.4410 stainless steel: which one to choose?
Choose 1.4462 when you need a cost-effective solution for moderate chloride exposure, mechanical strength, and good weldability. Ideal for pumps, structural components, piping systems, and heat exchangers.
Choose 1.4410 for critical applications where maximum corrosion resistance and strength are essential, such as offshore platforms, desalination plants, and chemical tankers.
Not sure whether 1.4462 or 1.4410 stainless steel is right for your project? Our engineering team can help you evaluate working conditions, chloride exposure, and cost-performance balance.
We offer mill-certified duplex and super duplex stainless steel pipes in a wide range of dimensions and surface finishes. Contact us today for a data sheet, material test certificate (MTC), and fast quotation tailored to your specifications.
We supply 1.4462 (Duplex 2205) and 1.4410 (Super Duplex 2507) stainless steel in the following pipe forms:
Seamless pipe(hot finished / cold drawn):
OD: 6 mm – 610 mm
SCH10S to SCH160 / custom wall thickness
Standards: ASTM A790 / EN 10216-5
Welded pipe (ERW / TIG / laser):
OD: 12 mm – 1219 mm
Polished or pickled surface available
Standards: ASTM A928 / EN 10217-7
Sanitary / hygienic tube (electropolished / mechanically polished):
Surface roughness Ra ≤ 0.8μm or ≤ 0.4μm
Suitable for food, biotech, and pharma
Heat exchanger tubes (U-tube, coiled tube):
Customized length, bending radius per drawing
Pipe fittings & flanges (matching grade):
Elbows, tees, reducers, stub ends, flanges – ANSI/EN/DIN standards
