About Alloy
Hayness 233 alloy is a new Ni-Co-Cr-Mo-Al alloy that offers excellent oxidation resistance at temperatures up to 2100°F (1149°C) or higher coupled with superior creep strength - a combination of properties never before achieved in a readily fabricable alloy. The alloy obtains its exceptional oxidation resistance through the formation of a protective alumina layer, while the high creep strength is a result of solid-solution and carbide strengthening. Additionally, for use in intermediate temperature applications the alloy can be age-hardened by heat treatment to produce even greater strength. Finally, the alloy can be readily fabricated using conventional methods since it exhibits good hot workability, cold formability, and weldability.
Product Form
● Plate/Sheet
Round Bar/Forgings
Chemical Composition
| Nickel: | 48 (Balance) |
| Chromium: | 19 |
| Cobalt: | 19 |
| Molybdenum: | 7.5 |
| Titanium: | 0.5 |
| Aluminum: | 3.3 |
| Iron: | 1.5 max. |
| Manganese: | 0.4 max. |
| Silicon: | 0.20 max. |
| Carbon: | 0.1 |
| Boron: | 0.004 |
| Tantalum: | 0.5 |
Property
HAYNES 233 alloy can be age-hardened to increase strength at temperatures below the gamma-prime solvus. The data below was from HAYNES 233 sheet material age-hardened at 1650°F/4h/AC + 1450°F/8h/AC (899°C/4h/AC + 788°C/8h/AC).
| Temperature | 0.2% Yield Strength | Ultimate Tensile Strength | Elongation | |||
| °F | °C | ksi | MPa | ksi | MPa | % |
| RT | RT | 112.9 | 778 | 172.2 | 1187 | 27.3 |
| 1000 | 538 | 102.2 | 704 | 147 | 1014 | 25.8 |
| 1200 | 649 | 95.5 | 658 | 156.6 | 1079 | 25.5 |
| 1400 | 760 | 97.4 | 671 | 116.5 | 804 | 27.4 |
| 1500 | 816 | 82 | 565 | 92.3 | 637 | 21.6 |
Application
Haynes 233, a high-performance nickel-based superalloy, is strategically utilized across various industries where its exceptional properties are indispensable:
● Aerospace: Haynes 233 plays a crucial role in aerospace applications, particularly in jet engine components such as turbine blades and combustion chambers. Its ability to withstand high temperatures and mechanical stresses makes it ideal for enhancing aircraft performance and reliability.
● Power Generation: In the realm of power generation, Haynes 233 is employed in gas turbine engines and other high-temperature components. It ensures efficiency and durability, contributing to stable and reliable electricity production.
● Industrial Furnaces: Due to its excellent resistance to oxidation and high-temperature strength, Haynes 233 is used in heat treatment furnaces. It withstands extreme thermal cycles and maintains structural integrity over prolonged operational periods.
● Chemical Processing: Haynes 233 is vital in the chemical industry for equipment exposed to aggressive environments. It resists corrosion from acids, alkalis, and other chemicals, ensuring operational reliability and safety.
● Oil & Gas: Components made from Haynes 233 are utilized in oil refineries and petrochemical plants, where resistance to high temperatures and corrosive substances is critical for maintaining operational efficiency and safety.
● Nuclear Applications: In nuclear reactors, Haynes 233 is deployed in critical components such as reactor internals and heat exchangers. Its robustness against radiation and high temperatures supports the reliability and safety of nuclear power generation.
● Automotive: While less common, Haynes 233 may also find applications in high-performance automotive engines, particularly in components requiring superior heat resistance and durability.
Haynes 233's versatility across these diverse industries underscores its reputation as a reliable material choice for applications demanding high-temperature strength, corrosion resistance, and long-term reliability.
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