- Description
2507 plaque en acier inoxydable (also known as Super Duplex Stainless Steel) is a high-performance duplex alloy combining austenitic and ferritic microstructures. It is designed for extremely aggressive environments where both high strength and outstanding corrosion resistance are required. Compared with standard duplex grades like 2205, 2507 offers significantly improved resistance to chloride pitting, corrosion caverneuse, et la fissuration de la corrosion de stress.
Composition chimique de 2507 Plaque en acier inoxydable
The balanced high chromium, nickel, and molybdenum content gives 2507 its super duplex performance.
| Élément | Contenu (%) |
|---|---|
| Chrome (Cr) | 24.0–26.0 |
| Nickel (Dans) | 6.0–8,0 |
| Molybdène (Mo) | 3.0–5.0 |
| Azote (N) | 0.24–0.32 |
| Carbone (C) | ≤ 0.03 |
| Manganèse (Mn) | ≤ 1.20 |
| Silicium (Et) | ≤ 0.80 |
| Phosphore (P.) | ≤ 0.035 |
| Soufre (S) | ≤ 0.02 |
| Fer (Fe) | Équilibre |
Propriétés mécaniques de 2507 Acier inoxydable
2507 stainless steel provides very high strength while maintaining good toughness and corrosion resistance.
| Propriété | Valeur typique |
|---|---|
| Résistance à la traction | 800–1000 MPa |
| Limite d'élasticité | ≥ 550 MPa |
| Élongation | ≥ 15–25% |
| Dureté | ≤ 300 HB |
| Densité | 7.8 g/cm³ |
Principales caractéristiques de performance
1. Excellente résistance à la corrosion
2507 stainless steel is designed for extreme corrosion environments, offering superior resistance to:
- Seawater and marine environments
- Chloride-rich chemical solutions
- Acidic and oxidizing conditions
- Offshore oil and gas systems
Its pitting resistance equivalent number (BOIS) is very high, making it suitable for long-term seawater exposure.
2. Haute résistance (Dual Phase Structure)
The duplex structure (ferrite + austénites) gives 2507:
- Nearly double the strength of 304/316 acier inoxydable
- Excellent load-bearing capacity
- Reduced material thickness for same strength requirements
- Good fatigue resistance
3. Resistance to Stress Corrosion Cracking
Unlike standard austenitic stainless steels, 2507 has excellent resistance to chloride stress corrosion cracking, making it ideal for offshore and seawater applications.
4. Good Thermal Conductivity and Stability
Par rapport aux nuances austénitiques, 2507 offres:
- Better thermal conductivity
- Lower thermal expansion
- Stable performance under temperature variation
Applications courantes de 2507 Plaque en acier inoxydable
2507 stainless steel plate is widely used in highly corrosive and high-strength engineering environments.
Les applications typiques incluent:
- Offshore oil and gas platforms
- Seawater desalination systems
- Marine engineering structures
- Équipement de traitement chimique
- Heat exchangers and pressure vessels
- Flue gas desulfurization (FGD) systèmes
- Pulp and paper industry equipment
- Subsea pipelines and components
- High-pressure seawater systems
- Pompes, vannes, and fittings
2507 Duplex vs 2205 Acier inoxydable duplex
| Propriété | 2507 Acier inoxydable | 2205 Acier inoxydable |
|---|---|---|
| Taper | Super-Duplex | Duplex |
| Résistance à la corrosion | Plus haut | Bien |
| Force | Plus haut | Haut |
| PREN Value | ~40+ | ~35 |
| Résistance aux chlorures | Excellent | Bien |
| Utilisation typique | Severe offshore/chemical | General marine/industrial |
