Haynes® 230 alloy (Ni-22Cr-14W-2Mo) is a high-temperature, nickel-based superalloy designed for exceptional oxidation resistance, thermal stability, and mechanical strength. Its performance at temperatures exceeding 1000 °C makes it a preferred choice for demanding environments such as gas turbines, aerospace engines, and chemical processing equipment.
Material Overview
Haynes 230 alloy derives its outstanding properties from a solid-solution strengthened Ni–Cr–W–Mo system. Chromium provides oxidation resistance, while tungsten and molybdenum enhance creep strength and phase stability. The alloy maintains tensile strengths above 600 MPa at 870 °C and resists grain coarsening during long-term exposure (Pike & Srivastava, 2011). The formation of a protective Cr2O3 layer with MnCr2O4 spinel ensures excellent oxidation resistance up to 1100 °C (Kim et al., 2009). Studies have shown that thermal exposure for up to 50,000 hours at 649–871 °C results in minimal degradation in tensile and impact properties, confirming its exceptional thermal stability (Pike & Srivastava, 2011). Solid-state joining techniques such as thermal stir welding (TSW) further improve the alloy’s processability, reducing weld cracking and maintaining structural integrity (Schneider et al., 2015).
Applications and Advantages
Haynes 230 alloy is used in high-temperature components including gas turbine combustors, transition ducts, and industrial heating systems. Its combination of strength, oxidation resistance, and carburization resistance makes it ideal for use in chemical reactors and heat exchangers. Compared to other Ni–Cr alloys, Haynes 230 shows superior thermal fatigue resistance due to its finer grain structure and stable carbide distribution (Katcher & Klarstrom, 2008). In helium-cooled reactor environments, it exhibits low oxidation rates and stable surface morphology even after 500 hours at 1000 °C (Kim et al., 2011). The alloy’s ability to form adherent oxide scales and resist spallation contributes to its exceptional longevity under cyclic thermal loading.
Goodfellow Availability
Goodfellow supplies Haynes® 230 alloy in rod, sheet, and custom-formed geometries for research and high-temperature industrial use. Manufactured to precise composition and microstructural standards, it provides reliable performance under extreme mechanical and thermal stress.
Explore Haynes® 230 alloy Ni62/Cr22/W14/Mo2 and other advanced materials in Goodfellow’s online catalogue: Goodfellow product finder.
References
- Pike, L. M., & Srivastava, S. K. (2011). Thermal stability of a Ni–Cr–W–Mo alloy – Long-term exposures. Advanced Materials Research, 278, 327–332. https://doi.org/10.4028/WWW.SCIENTIFIC.NET/AMR.278.327
- Kim, D., Jang, C., & Ryu, W. S. (2009). Oxidation characteristics and oxide layer evolution of Alloy 617 and Haynes 230 at 900 °C and 1100 °C. Oxidation of Metals, 71(5–6), 271–290. https://doi.org/10.1007/S11085-009-9142-5
- Katcher, M., & Klarstrom, D. L. (2008). A review of Haynes® 230® and 617 alloys for high temperature gas cooled reactors. Materials Science Forum, 595–598, 511–520. https://doi.org/10.4028/WWW.SCIENTIFIC.NET/MSF.595-598.511
- Schneider, J., Williston, D., Murphy, T. L., Varner, C., Hawkins, J., & Walker, B. (2015). Solid state joining of nickel-based alloy, Haynes 230. Journal of Materials Processing Technology, 222, 65–72. https://doi.org/10.1016/J.JMATPROTEC.2015.04.034
- Kim, D., Sah, I., Kim, D.-H., Ryu, W.-S., & Jang, C. (2011). High temperature oxidation behavior of Alloy 617 and Haynes 230 in impurity-controlled helium environments. Oxidation of Metals, 75(3–4), 209–230. https://doi.org/10.1007/S11085-010-9223-5