INCONEL® Alloy 686: Comprehensive Product Introduction
Introduction to INCONEL® Alloy 686
INCONEL® alloy 686 is a versatile nickel-chromium-molybdenum-tungsten alloy known for its exceptional corrosion resistance in a wide range of aggressive environments. Developed as an upgrade over traditional nickel alloys, INCONEL® 686 offers superior resistance to localized corrosion, pitting, and crevice corrosion. This article provides a detailed overview of INCONEL® alloy 686, 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 686
INCONEL® alloy 686 is formulated with precise elements to achieve its corrosion-resistant properties:
| Élément | Composition (%) |
|---|---|
| Nickel (Ni) | 58,0 minutes |
| Chrome (Cr) | 20.0-23.0 |
| Molybdène (Mo) | 15.0-17.0 |
| Tungstène (W) | 3.0-4.4 |
| Fer (Fe) | 5.0 max |
| Cobalt (Co) | 1,0 maximum |
| Manganèse (Mn) | 1,0 maximum |
| Silicium (Si) | 00,50 maximum |
| Carbone (C) | 00,020 maximum |
| Phosphore (P) | 00,015 maximum |
| Soufre (S) | 0.010 max |
Mechanical Properties of INCONEL® Alloy 686
INCONEL® alloy 686 exhibits robust mechanical properties suitable for demanding 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 | 40% min |
| Dureté (Brinell) | 200-250 (varies with heat treatment) |
| Densité | 8.68 g/cm³ |
Performances à différentes températures
INCONEL® alloy 686 maintains its corrosion resistance and mechanical properties across a wide range of temperatures:
| Plage de température | Performance |
|---|---|
| Température ambiante | High resistance to corrosion and mechanical strength |
| Elevated Temperatures (up to 1000°C / 1832°F) | Conserve la solidité et la résistance à l’oxydation |
| Températures cryogéniques | Maintient la ductilité et la ténacité |
Notes correspondantes dans différents pays
INCONEL® alloy 686 is recognized by various grades in different countries and regions:
| Pays/Région | Grade |
|---|---|
| USA | UNS N06686 |
| Allemagne | 2.4606 |
| France | – |
| UK | – |
| Japon | – |
| Chine | – |
Formes standard, tailles et normes de production
Formes et tailles
INCONEL® alloy 686 is available in various forms and sizes to meet industrial requirements:
| Formulaire | Gamme de tailles |
|---|---|
| Feuilles | Épaisseur : 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 686 conforms to international production standards:
| Standard | Description |
|---|---|
| ASTM B462 | Pièces forgées |
| ASTMB564 | Bars and forgings |
| ASTMB574 | Rods |
| ASTMB575 | Plates and sheets |
| ASTM B619/B622 | Welded and seamless pipes and tubes |
| ASTMB366 | Raccords |
Industry Applications of INCONEL® Alloy 686
INCONEL® alloy 686 is widely utilized across various industries due to its superior corrosion resistance and mechanical properties:
- Traitement chimique: Reactors, vessels, and piping systems handling acids, alkalis, and mixed chemicals.
- Pétrole et Gaz: Equipment in sour gas environments, including downhole components and pipelines.
- Pulp and Paper: Digesters, bleach plants, and recovery boilers.
- Production d'électricité: Flue gas desulfurization systems, scrubbers, and heat exchangers.
- Marin: Propeller shafts, seawater cooling systems, and marine exhaust systems.
Advantages of INCONEL® Alloy 686
- Superior Corrosion Resistance: Excellent resistance to localized corrosion and pitting.
- High Strength: Maintains mechanical integrity in harsh environments.
- Versatilité: Suitable for both high and low-temperature applications.
- Longevity: Provides long-term reliability in corrosive environments.
Conclusion
INCONEL® alloy 686 stands as a high-performance alloy designed to excel in corrosive environments where traditional materials fall short. With its unique combination of chemical composition, mechanical properties, and adherence to international standards, it serves critical applications across global industries. Engineers and designers seeking durability and reliability in aggressive chemical and marine environments can confidently consider INCONEL® alloy 686 for their projects.
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 686, emphasizing its chemical composition, mechanical properties, performance characteristics at different temperatures, applications, and advantages in demanding industrial environments across various countries.