Haynes214 Alloy

Haynes214, a nickel-chromium-aluminum-iron alloy, is renowned for its exceptional high-temperature performance. This alloy has been engineered to withstand the rigors of extreme heat, making it a preferred choice in a wide range of industries.

1. Chemical Composition (Mass Fraction, %)

2. Physical Properties

• Density: 8.05 g/cm³.
• Elastic Modulus: At 70°F (20°C), it is 31.6×10³ksi (218GPa).
• Coefficient of Thermal Expansion: In the range of 70 – 2000°F (25 – 1100°C), it is 20.2μm/m – °C.
• Resistivity: 135.9μΩ·cm.
• Thermal Conductivity: 12.0W/m – °C.
• Exceptional High-temperature Corrosion and Oxidation Resistance: Haynes214 exhibits outstanding performance at 955°C (1750°F) and above. It forms an Al₂O₃ type oxide scale, which offers excellent resistance to carburization, nitriding, and corrosion in chlorine – bearing oxidizing environments.
• Ductility Variation: In the temperature range of 1300°F (700°C) – 1400°F (760°C), the formation of the metal – intermetallic compound Ni₃Al leads to a reduction in ductility. However, at temperatures above 1750°F, the alloy’s properties are more favorable for high – temperature applications.

3. Performance Characteristics

4. Production Standards

Haynes214 complies with standards such as AMS 5732, AMS 5861, and ASTM B 637, ensuring its quality and reliability in various applications.

5. Application Fields

• Aerospace: Used in components like gas turbine combustion chambers and transition ducts, where it can withstand the high – temperature and high – stress conditions encountered in aerospace engines.
• Automotive: Employed in high – performance automotive applications, such as parts in engines or exhaust systems that are exposed to extreme heat.
• Industrial Heating: Ideal for furnace linings, heat exchangers, and other components in industrial heating equipment, as it can resist oxidation and corrosion during continuous operation at high temperatures.
• Medical Waste Disposal: Due to its excellent resistance to harsh environments, it can be used in equipment for medical waste incineration, which often operates at high temperatures and in corrosive atmospheres.
• Land – based Gas Turbines: Haynes214 is used in the construction of turbine shrouds and other parts, contributing to the efficient and reliable operation of gas turbines.
• Hot Working: Haynes214 can be hot worked in the temperature range of about 2200°F (1200°C) to 1800°F (980°C). It is crucial to heat the workpiece appropriately, considering its size and complexity. For complex shapes, pre – equilibrating at around 1600°F (870°C) before reaching the final hot – working temperature can be beneficial. Working the alloy quickly with sufficient deformation to maintain heat within the workpiece is a good practice. It is strongly advised to stop the operation when the workpiece reaches 1800°F (980°C) to minimize the risk of cracking caused by the precipitation of gamma prime and the resulting loss of ductility.
• Cold Working: Cold working operations such as cold rolling and stamping can be performed, but care must be taken to avoid excessive strain. Intermediate annealing may be required to restore ductility.
• Welding: The alloy has good welding characteristics, but extended time at intermediate age – hardening temperatures should be avoided. Appropriate filler materials and welding procedures should be selected to ensure the integrity of the welded joint.

6. Processing Considerations

In conclusion, Haynes214 is a versatile and high – performing alloy that plays a crucial role in industries where high – temperature resistance, corrosion resistance, and mechanical integrity are of utmost importance. Its unique combination of properties makes it an ideal choice for applications that demand reliability and durability under extreme conditions.