Stainless steel grade LDX 2404® is a lean duplex stainless steel containing molybdenum. The new duplex grade LDX 2404® has been designed with a property profile to fill the gap between the existing Duplex steel grades 2304 and 2205. It is also specially designed as a replacement of grade 304/304L in several applications.
LDX 2404® steel has high resistance to uniform corrosion, to pitting and crevice corrosion, and to stress corrosion cracking. It has excellent mechanical strength, good abrasion and erosion resistance, good fatigue resistance, and good weldability. High energy absorption and low thermal expansion are two other characteristics of this material.
The following datasheet provides an overview of stainless steel grade LDX 2404®.
Chemical Composition
The chemical composition of stainless steel grade LDX 2404® is outlined in the following table.
| Element | Content (%) |
|---|---|
| Iron, Fe | Balance |
| Chromium, Cr | 24 |
| Nickel, Ni | 3.6 |
| Manganese, Mn | 3 |
| Molybdenum, Mo | 1.6 |
| Nitrogen, N | 0.27 |
| Carbon, C | 0.02 |
Mechanical Properties
The mechanical properties of stainless steel grade LDX 2404® are displayed in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength (cold rolled plate and sheet) | 680 MPa | 98625 psi |
| Modulus of elasticity (68°F/ 106) | 0.19994 GPa | 29 ksi |
| Poisson’s ratio | 0.3 | 0.3 |
| Elongation at break (In 2″, 50% cold worked) | 25% | 25% |
Other Designations
Equivalent material to stainless steel grade LDX 2404® is EN 1.4662.
Manufacturing Process
Stainless steel grade LDX 2404® can be hot formed in the temperature range 900-1120°C (1652-2048°F), which should be followed by solution annealing to regain the original properties. The mechanical strength of this steel tends to be low at these high temperatures. Welding can be easily performed using traditional methods. Likewise cold forming is also suitable for this steel. To perform heat treatment, LDX 2404® steel should be solution annealed at 1000-1120°C (1832-2048°F). Rapid cooling should be performed after annealing to regain the original properties.
Applications
The applications of stainless steel grade LDX 2404® are as follows:
- Energy sector
- Oil and gas sector
- Storage tanks
- Pulp and paper
- Piping systems
- Process industry
- Structural components
- Boilers and water heaters
- Architectural applications
- Water treatment and desalination
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