Nickel Alloy 925 / Incoloy 925® Product Introduction
Nickel Alloy 925, commercially known as Incoloy 925®, is a nickel-iron-chromium alloy designed for high-strength applications in various industries. This article provides a comprehensive introduction to its chemical composition, mechanical properties, performance characteristics, industrial applications, shapes, sizes, production standards, international grades, welding considerations, processing methods, polishing techniques, heat treatment specifics, cold working capabilities, as well as an assessment of its advantages, disadvantages, and comparison with similar products.
Composition chimique
The chemical composition of Nickel Alloy 925 is crucial for understanding its properties and suitability for specific applications. Below is a table detailing its composition:
| Élément | Composition (%) |
|---|---|
| Nickel (Ni) | 42.0 – 46.0 |
| Fer (Fe) | 22,0 minutes |
| Chrome (Cr) | 19.5 – 22.5 |
| Molybdène (Mo) | 2,5 – 3,5 |
| Cuivre | 1,5 – 3,0 |
| Titane (Ti) | 1,9 – 2,4 |
| Aluminium (Al) | 0.1 – 0.5 |
| Silicium (Si) | 0.1 maximum |
| Carbone (C) | 00,03 maximum |
| Manganèse (Mn) | 00,01 maximum |
| Soufre (S) | 00,01 maximum |
| Phosphore (P) | 00,01 maximum |
Propriétés mécaniques
Nickel Alloy 925 exhibits excellent mechanical properties suitable for demanding environments. The following table outlines its typical mechanical properties:
| Propriété | Valeur |
|---|---|
| Résistance à la traction (MPa) | 810 min |
| Yield Strength (0.2% offset) (MPa) | 550 min |
| Allongement (%) | 30 minutes |
| Dureté (HV) | 255 max |
Performances à différentes températures
The performance of Nickel Alloy 925 varies with temperature, making it versatile for both high and low-temperature applications. Here are its typical characteristics:
| Plage de températures (° C) | Performance |
|---|---|
| Température ambiante | Excellent strength and ductility |
| Températures élevées | Retains high strength and oxidation resistance |
| Températures cryogéniques | Maintient la ténacité et la ductilité |
Applications industrielles
Nickel Alloy 925 finds extensive use in various industries due to its robust properties. Applications include:
- Pétrole et Gaz: Downhole and surface applications, including wellhead components and valves.
- Aérospatial: Engine components, landing gear, and structural parts.
- Traitement chimique: Equipment for corrosive environments.
- Marin: High-strength fasteners and fittings.
Normes de forme, de taille et de production
Nickel Alloy 925 is available in various forms such as round bars, sheets, plates, and pipes. Sizes range from small components to large structural parts. It conforms to industry standards such as ASTM B805 and AMS 5661.
Normes et notes correspondantes
The alloy complies with international standards and has equivalent grades across different countries, ensuring global compatibility and availability.
Welding, Processing, Polishing, Heat Treatment, Cold Processing
| Processus | Détails |
|---|---|
| Soudage | Weldable using conventional methods; preheating and post-weld heat treatment may be necessary. |
| Usinage | Requires sharp tools and adequate cooling to minimize work hardening. |
| Polissage | Achieves a smooth finish suitable for aesthetic and corrosion resistance enhancement. |
| Traitement thermique | Annealing at specific temperatures enhances ductility and stress relief. |
| Fonctionnement à froid | Cold drawing or rolling improves strength and dimensional accuracy. |
Avantages et inconvénients
| Avantages | Désavantages |
|---|---|
| Haute résistance et ténacité | Higher cost compared to standard stainless steels |
| Excellente résistance à la corrosion | Requires skilled handling during fabrication |
| Wide range of applications | Limited availability in some regions |
| Bonne soudabilité et usinabilité |
Produits similaires
Comparable alloys include Inconel 718 and Hastelloy C-276, offering similar properties for specific applications.
Conclusion
Nickel Alloy 925 / Incoloy 925® combines high strength, excellent corrosion resistance, and versatile performance across diverse industrial applications. Its chemical composition, mechanical properties, and standards ensure reliability in demanding environments, making it a preferred choice for critical components in aerospace, oil and gas, and chemical processing sectors.
For further detailed specifications and applications, consulting technical datasheets and manufacturer guidelines is recommended.