INCONEL® Alloy 625LCF: Comprehensive Product Introduction
Introduction to INCONEL® Alloy 625LCF
INCONEL® alloy 625LCF is a specialized version of INCONEL® alloy 625, tailored for enhanced fatigue resistance, particularly in low-cycle fatigue (LCF) applications. This nickel-based superalloy retains the excellent strength, corrosion resistance, and versatility of standard alloy 625 while offering superior performance under cyclic loading conditions. This article provides a detailed overview of INCONEL® alloy 625LCF, covering its chemical composition, mechanical properties, performance at different temperatures, corresponding grades, industry applications, available forms, sizes, and production standards across various countries.
Chemical Composition of INCONEL® Alloy 625LCF
INCONEL® alloy 625LCF maintains a similar chemical composition to alloy 625, optimized for enhanced fatigue life:
| Élément | Composition (%) |
|---|---|
| Nickel (Ni) | 58,0 minutes |
| Chrome (Cr) | 20.0-23.0 |
| Molybdène (Mo) | 8,0-10,0 |
| Fer (Fe) | 5.0 max |
| Niobium (Nb) | 3.15-4.15 |
| Cobalt (Co) | 1,0 maximum |
| Manganèse (Mn) | 00,50 maximum |
| Silicium (Si) | 00,50 maximum |
| Carbone (C) | 00,10 maximum |
| Phosphore (P) | 00,015 maximum |
| Soufre (S) | 00,015 maximum |
| Aluminium (Al) | 0.40 max |
| Titane (Ti) | 0.40 max |
Mechanical Properties of INCONEL® Alloy 625LCF
INCONEL® alloy 625LCF offers excellent mechanical properties suitable for high-stress and cyclic loading applications:
| Propriété | Valeur |
|---|---|
| Résistance à la traction | 760 MPa (110 ksi) min |
| Limite d'élasticité (compensation de 0,2 %) | 345 MPa (50 ksi) min |
| Élongation | 30 % minimum |
| Dureté (Brinell) | 150-240 (varies with heat treatment) |
| Densité | 8.44 g/cm³ |
| Fatigue Life | Enhanced LCF performance |
Performances à différentes températures
INCONEL® alloy 625LCF exhibits robust performance across a wide range of temperatures:
| Plage de température | Performance |
|---|---|
| Température ambiante | High strength and corrosion resistance |
| Elevated Temperatures (up to 980°C / 1800°F) | Retains mechanical properties |
| Températures cryogéniques | Maintient la ductilité et la ténacité |
Notes correspondantes dans différents pays
INCONEL® alloy 625LCF is identified by similar grades as INCONEL® alloy 625 globally:
| Pays/Région | Grade |
|---|---|
| USA | UNS N06626 (625LCF) |
| Allemagne | 2,4856 |
| France | NC22DNB4M (625LCF) |
| UK | NA21 |
| Japon | NCF 625LCF |
| Chine | GH3625 |
Formes standard, tailles et normes de production
Formes et tailles
INCONEL® alloy 625LCF is available in various forms and sizes to meet diverse industrial needs:
| Formulaire | Gamme de tailles |
|---|---|
| Feuilles | Thickness: 0.1 mm – 50 mm |
| Assiettes | Thickness: 0.3 mm – 100 mm |
| Barres | Diamètre : 5 mm – 300 mm |
| Fil | Diamètre : 0,1 mm – 10 mm |
| Tubes | Diamètre extérieur : 6 mm – 200 mm |
| Tuyaux | Diamètre extérieur : 10 mm – 300 mm |
| Raccords | Diverses configurations selon les normes |
| Pièces forgées | Différentes formes et tailles selon les normes |
Normes de production
INCONEL® alloy 625LCF adheres to international production standards:
| Standard | Description |
|---|---|
| ASTM B443 | Feuilles, plaques et bandes |
| ASTM B446 | Barres, tiges et fils |
| ASTM B444 | Tuyaux et tubes sans soudure |
| ASTM B704 | Welded tubes |
| ASTMB564 | Pièces forgées |
| ASTMB366 | Raccords |
Industry Applications of INCONEL® Alloy 625LCF
INCONEL® alloy 625LCF is utilized in critical applications where fatigue resistance is essential:
- Aérospatial: Engine components, turbine discs, and seals.
- Production d'électricité: Gas turbine components, steam turbine blades.
- Traitement chimique: Equipment handling corrosive chemicals under cyclic loading.
- Marin: Fasteners and springs in marine environments.
- Pétrole et Gaz: Downhole tools, springs, and valve components.
Advantages of INCONEL® Alloy 625LCF
- Enhanced Fatigue Resistance: Improved performance in low-cycle fatigue applications.
- High Strength: Retains strength and toughness at elevated temperatures.
- Résistance à la corrosion: Resistant to oxidation and chloride-induced stress corrosion cracking.
- Fabricabilité: Easily machined, welded, and formed into complex shapes.
Conclusion
INCONEL® alloy 625LCF represents a significant advancement over standard alloy 625, offering enhanced fatigue resistance while maintaining exceptional strength and corrosion resistance. Its wide availability in various forms, adherence to international standards, and proven performance in critical industries make it a preferred choice for applications demanding reliability and durability under cyclic loading conditions.
Pour des spécifications techniques détaillées et des demandes de renseignements complémentaires, il est recommandé de référencer les fiches techniques des produits spécifiques et de consulter les fabricants.
This comprehensive introduction and detailed data sheet provide a thorough overview of INCONEL® alloy 625LCF, emphasizing its chemical composition, mechanical properties, performance characteristics at different temperatures, applications, and advantages in demanding industrial environments across different countries.