1.4410 vs. 1.4462 stainless steel: The key difference
What is 1.4410 material?
1.4410 is a high-performance super duplex stainless steel, also known as UNS designation S32750 or SAF 2507. It is an advanced alloy with a mixed austenitic-ferritic microstructure, combining high strength with excellent corrosion resistance, typically up to 1000 MPa. This allows for lighter designs without compromising safety, making it suitable for demanding applications in harsh environments.
What is the equivalent material for 1.4462 stainless steel?
DIN 1.4462 is a duplex stainless steel with a 22% chromium content. When supplied in solid bar form, it may also be referred to as UNS S31803 (ASTM A182 F51) or UNS S32205 (ASTM A182 F60). This grade of DIN 1.4462 was originally developed in the 1930s for use in paper and pulp manufacturing.
1.4410 VS. 1.4462 ：What's The Difference?
The main difference lies in their composition. 1.4410 is a super duplex stainless steel, similar to 1.4462 but with higher corrosion resistance. 1.4410 consists of 25% chromium, 7% nickel, 4% molybdenum, and 0.27% nitrogen, along with trace amounts of other elements. 1.4462, on the other hand, is 2205 duplex steel, a typical duplex stainless steel. It is primarily composed of 21% chromium, 2.5% molybdenum, 4.5% nickel, and nitrogen. 1.4462 is a more common and economical choice, suitable for general chemical plants and less corrosive environments.
Chemical Composition Comparison (%)
| Element | 1.4410 (AISI 329 / UNS S32900) | 1.4462 (AISI 446 / UNS S44600) |
|---|---|---|
| C | ≤0.03 | ≤0.20 |
| Mn | ≤1.50 | ≤1.50 |
| P | ≤0.045 | ≤0.045 |
| S | ≤0.015 | ≤0.015 |
| Si | 0.50–1.50 | 0.50–1.00 |
| Cr | 21–23 | 23–27 |
| Ni | 5–7 | 0.50–1.00 |
| N | ≤0.10 | ≤0.10 |
| Mo | – | 0.50–1.00 |
Mechanical Properties
1.4410 duplex stainless steel pipe possesses high strength, high hardness, and good toughness. Its tensile strength Rm is 730–930 MPa, its minimum yield strength Rp0.2 at room temperature is 530 MPa, and at 250℃ it is 380 MPa. The elongation A (along the x-direction) is 25%, and the notched impact energy (along the x-direction) is 100 J.
| Property | 1.4410 (AISI 329) | 1.4462 (AISI 446) |
|---|---|---|
| Tensile Strength (MPa) | 520–680 | 450–600 |
| Yield Strength 0.2% (MPa) | ≥210 | ≥200 |
| Elongation (%) | ≥30 | ≥20 |
| Hardness (HB) | ≤200 | ≤180 |
| Service Temperature (°C) | Up to 400 | Up to 600 (high-Cr, heat-resistant grade) |
1.4410 vs. 1.4462 Duplex Stainless Steel: Corrosion Resistance
1.4410 duplex stainless steel exhibits higher corrosion resistance than 1.4462 duplex stainless steel because its duplex structure provides better resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking, making it particularly suitable for applications in harsh environments containing high chloride and corrosive media.
What is the difference between 1.4462 and 1.4410?
The main difference is that 1.4410 is a super duplex stainless steel with higher corrosion resistance and strength, while 1.4462 is a standard duplex stainless steel. This is due to 1.4410 having significantly higher levels of chromium, nickel, and molybdenum, making it suitable for more demanding environments, whereas 1.4462 is a more common and less expensive option for general use.
What is the difference between 1.4410 and1.4501?
The main difference is that 1.4410 and 1.4501 are both super duplex stainless steels, but 1.4501 has a slightly different chemical composition, notably including copper and tungsten, while 1.4410 does not specify copper or tungsten and has a slightly different range for molybdenum and nitrogen. 1.4501 is also known by the UNS designation S32760, while 1.4410 is equivalent to S32750.
If you have project needs for 1.4410 or 1.4462 stainless steel bars, please feel free to place an order. GNEE has a large inventory of popular products for your selection. They can be processed into various practical product forms, including plates, coils, pipes, bars, and wires. For detailed chemical composition and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com
