1.4462 is a nitrogen-reinforced duplex stainless steel that solves the corrosion problems of 300 series steels. It is the most popular duplex grade. In addition, it combines strength, ease of processing and durability. For stainless steel pipe and fittings, it performs better in harsh environments such as chemical plants.
Chemical Composition of 1.4462
| Element | C | Cr | Ni | Mo | N | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|---|
| Content (%) | ≤0.03 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.10-0.22 | ≤2.0 | ≤1.0 | ≤0.035 | ≤0.015 |
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Material Standards
- EN 10088-3: Covers duplex stainless steel grades.
- UNS S31803: Matches its international designation.
Core Advantages of 1.4462
Due to its high content of chromium and molybdenum, 1.4462 prevents pitting and crevice corrosion. Even in highly corrosive chemical plants or coastal areas, stainless steel tubes are kept rust-free.
Stress corrosion cracking caused by chlorides is easily resisted. Ensures that stainless steel fittings remain strong and reliable for many years in environments containing salt or moisture.
With a tensile strength of 650 MPa, it can withstand heavy pressure without bending. Provides support for stainless steel tubing in highly loaded systems such as refineries or food processing plants.
Easy to weld and form, reducing production time for stainless steel fittings. Its smooth machinability increases efficiency without compromising quality or durability.
Physical Properties of 1.4462
| Property | Density | Thermal Conductivity | Coefficient of Expansion |
|---|---|---|---|
| Value | 7.8 g/cm³ | 15 W/m·K | 13.0 x 10⁻⁶ /K |
Mechanical Properties of 1.4462
| Property | Tensile Strength (Rm) | Yield Strength (Rp0.2) | Elongation (A) | Hardness (HB) |
|---|---|---|---|---|
| Value | ≥650 MPa | ≥450 MPa | ≥25% | ≤270 |
Applications in Stainless Steel
- Stainless Steel Pipes: Handles chemical plant pipelines with ease.
- Stainless Steel Fittings: Strengthens connectors in food processing.
1.4410 vs. 1.4462
| Feature | 1.4410 (Super Duplex) | 1.4462 (Duplex) |
|---|---|---|
| UNS Designation | S32750 | S31803 |
| PREN | 40-43 | 34-38 |
| Temperature Range | -50°C to 300°C | -50°C to 280°C |
| Cost | Higher | More Affordable |
| More on 1.4410 vs. 1.4462 >> | ||
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