UDIMET® Alloy 720 Product Introduction
UDIMET® alloy 720 is a high-strength nickel-based superalloy known for its excellent mechanical properties and resistance to high-temperature environments. This article provides a comprehensive introduction to UDIMET® alloy 720, covering its chemical composition, mechanical properties, performance at different temperatures, industry applications, shapes and sizes, production standards, welding and processing capabilities, advantages and disadvantages, and a comparison with similar alloys.
Composición química
UDIMET® alloy 720 is primarily composed of nickel with significant additions of cobalt, chromium, iron, and other elements to enhance its mechanical and thermal properties:
| Elemento | Composición (%) |
|---|---|
| Níquel (Ni) | 59.0 – 63.0 |
| Cobalto (Co) | 17,0 – 21,0 |
| Cromo (Cr) | 15.0 – 17.0 |
| Hierro (Fe) | 3,0 – 5,0 |
| Molibdeno (Mo) | 1,5 – 2,5 |
| Tungsteno (W) | 0.5 – 1.5 |
| Aluminio (Al) | 0.5 – 1.5 |
| Titanio (Ti) | 0.5 – 1.5 |
| Boron (B) | 0.003 – 0.01 |
| Carbono (C) | 0.08 máx. |
Propiedades mecánicas
UDIMET® alloy 720 exhibits excellent mechanical properties suitable for high-temperature applications:
| Propiedad | Valor |
|---|---|
| Resistencia a la tracción, ksi (MPa) | 170 – 190 (1172 – 1310) |
| Límite elástico (0,2 % de compensación), ksi (MPa) | 120 – 140 (827 – 965) |
| Alargamiento (% en 2 pulgadas) | 15 – 20 |
| Dureza, Rockwell C (HRC) | 35 – 40 |
Características de presentación
UDIMET® alloy 720 offers several performance advantages:
- High-Temperature Strength: Retains excellent mechanical properties at elevated temperatures up to 1000°C (1832°F).
- Oxidation Resistance: Provides good resistance to oxidation and high-temperature corrosion in various environments.
- Creep Resistance: Exhibits high creep resistance, making it suitable for applications under constant stress at high temperatures.
Aplicaciones industriales
UDIMET® alloy 720 is used in various industries requiring high performance under extreme conditions:
| Sector industrial | Aplicaciones |
|---|---|
| Aeroespacial | Gas turbine components such as turbine blades, vanes, and discs. |
| Generación de energía | Gas and steam turbine components, combustion chambers, and heat exchangers. |
| Procesamiento químico | Reactor vessels, heat exchangers, and pipes handling corrosive chemicals at high temperatures. |
Formas y tamaños
UDIMET® alloy 720 is available in various forms and sizes to meet specific application requirements:
- Formas: Chapas, placas, barras, forjados y alambres.
- Tamaños: Espesores que van desde 0,5 mm hasta 100 mm para placas y diámetros que van desde 1 mm hasta 300 mm para barras redondas.
Estándares de producción
UDIMET® alloy 720 conforms to international production standards ensuring quality and reliability:
| Formulario de producto | Formas disponibles | Tamaños disponibles | Estándares de producción |
|---|---|---|---|
| Platos/Hojas | Hojas, Placas | Espesor: 0,5 mm – 100 mm | ASTM B637, AMS 5764 |
| Barras/varillas | Barras redondas, barras cuadradas | Diámetro: 1mm – 300mm | ASTM B637, AMS 5764 |
| Forjas | Bloques, Discos, Anillos | Tamaño: Personalizado | ASTM B637, AMS 5764 |
Soldadura y procesamiento
UDIMET® alloy 720 offers good weldability and processing characteristics:
- Soldadura: Can be welded using methods such as TIG, MIG, and resistance welding. Preheating and post-weld heat treatment may be required to maintain properties.
- Maquinabilidad: Generally machined in the solution-annealed condition using carbide tools and appropriate cutting fluids.
Ventajas y desventajas
| Aspecto | Detalles |
|---|---|
| Ventajas | High strength and toughness at elevated temperatures, excellent oxidation resistance, good creep resistance, and availability in various forms and sizes. |
| Desventajas | Higher cost compared to standard nickel alloys, requires specialized processing and handling due to its high strength and alloying elements. |
Comparación con aleaciones similares
UDIMET® alloy 720 (UNS N07200) is often compared with other high-strength nickel-based superalloys such as UDIMET® alloy 718 and UDIMET® alloy 625. Here’s a brief comparison:
| Tipo/propiedad de aleación | UDIMET® aleación 720 | UDIMET® alloy 718 | UDIMET® alloy 625 |
|---|---|---|---|
| Composición química | High nickel, cobalt, chromium, with additional alloying elements for high-temperature strength. | High nickel, chromium, and niobium with smaller additions of aluminum and titanium. | High nickel, chromium, and molybdenum with niobium and tantalum for strength and corrosion resistance. |
| Propiedades mecánicas | Higher tensile and yield strength, superior creep resistance at high temperatures. | Lower tensile and yield strength compared to UDIMET® alloy 720, good toughness and fatigue resistance. | Lower tensile and yield strength, excellent fatigue resistance, and good corrosion resistance in various environments. |
| Aplicaciones | Gas turbines, aerospace components requiring high-temperature strength and oxidation resistance. | Aerospace components, high-temperature bolts, and fasteners. | Chemical processing equipment, marine applications, and aerospace components requiring corrosion resistance. |
This detailed article introduces UDIMET® alloy 720, highlighting its chemical composition, mechanical properties, performance characteristics, industry applications, available forms and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and a comparison with similar alloys. Engineers and professionals seeking a robust, high-strength superalloy for demanding applications in aerospace, power generation, and chemical processing industries will find UDIMET® alloy 720 suitable for use under extreme conditions.