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:
| Elemento | Composizione (%) |
|---|---|
| Nichel (Ni) | 58,0 minuti |
| Cromo (Cr) | 20.0-23.0 |
| Molibdeno (Mo) | 15.0-17.0 |
| Tungsteno (W) | 3.0-4.4 |
| Ferro (Fe) | 5,0 massimo |
| Cobalto (Co) | 1,0 massimo |
| Manganese (Mn) | 1,0 massimo |
| Silicon (Si) | 00,50 massimo |
| Carbonio (C) | 00,020 massimo |
| Fosforo (P) | 00,015 massimo |
| Zolfo (S) | 00,010 massimo |
Mechanical Properties of INCONEL® Alloy 686
INCONEL® alloy 686 exhibits robust mechanical properties suitable for demanding applications:
| Proprietà | Valore |
|---|---|
| Resistenza alla trazione | 760 MPa (110 ksi) min |
| Limite di snervamento (compensazione dello 0,2%) | 345 MPa (50 ksi) min |
| Allungamento | 40% min |
| Durezza (Brinell) | 200-250 (varia con il trattamento termico) |
| Densità | 8.68 g/cm³ |
Prestazioni a diverse temperature
INCONEL® alloy 686 maintains its corrosion resistance and mechanical properties across a wide range of temperatures:
| Intervallo di temperatura | Prestazione |
|---|---|
| Temperatura ambiente | Elevata resistenza alla corrosione e resistenza meccanica |
| Temperature elevate (fino a 1000°C / 1832°F) | Mantiene la forza e la resistenza all'ossidazione |
| Temperature criogeniche | Mantiene duttilità e tenacità |
Gradi corrispondenti in diversi paesi
INCONEL® alloy 686 is recognized by various grades in different countries and regions:
| Paese/regione | Grado |
|---|---|
| Stati Uniti d'America | UNS N06686 |
| Germania | 2.4606 |
| Francia | – |
| UK | – |
| Giappone | – |
| Cina | – |
Forme standard, dimensioni e standard di produzione
Forme e dimensioni
INCONEL® alloy 686 is available in various forms and sizes to meet industrial requirements:
| Modulo | Gamma di dimensioni |
|---|---|
| Fogli | Spessore: 0,1 mm – 50 mm |
| Piatti | Spessore: 0,3 mm – 100 mm |
| Barre | Diametro: 5 mm – 300 mm |
| Filo | Diametro: 0,1 mm – 10 mm |
| Tubi | Diametro esterno: 6 mm – 200 mm |
| Tubi | Diametro esterno: 10 mm – 300 mm |
| Raccordi | Varie configurazioni a norma |
| Forgiati | Varie forme e dimensioni a norma |
Standard di produzione
INCONEL® alloy 686 conforms to international production standards:
| Standard | Descrizione |
|---|---|
| ASTM B462 | Forgiati |
| ASTM B564 | Barre e forgiati |
| ASTM B574 | Canne |
| ASTM B575 | Lastre e fogli |
| ASTM B619/B622 | Welded and seamless pipes and tubes |
| ASTM B366 | Raccordi |
Industry Applications of INCONEL® Alloy 686
INCONEL® alloy 686 is widely utilized across various industries due to its superior corrosion resistance and mechanical properties:
- Elaborazione chimica: Reactors, vessels, and piping systems handling acids, alkalis, and mixed chemicals.
- Olio e gas: Equipment in sour gas environments, including downhole components and pipelines.
- Pulp e carta: Digesters, bleach plants, and recovery boilers.
- Produzione di energia: Flue gas desulfurization systems, scrubbers, and heat exchangers.
- Marino: Propeller shafts, seawater cooling systems, and marine exhaust systems.
Advantages of INCONEL® Alloy 686
- Resistenza alla corrosione superiore: Excellent resistance to localized corrosion and pitting.
- Alta resistenza: Maintains mechanical integrity in harsh environments.
- Versatilità: Suitable for both high and low-temperature applications.
- Longevità: Provides long-term reliability in corrosive environments.
Conclusione
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.
Per specifiche tecniche dettagliate e ulteriori richieste, si consiglia di fare riferimento alle schede tecniche dei prodotti specifici e di consultare i produttori.
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.