Haynes — 4.89

| Property | Haynes 4.89 (Theoretical) | Titanium 6Al-4V | Inconel 718 | Haynes 188 | | :--- | :--- | :--- | :--- | :--- | | | 4.89 | 4.43 | 8.19 | 8.33 | | Max Service Temp (°C) | ~800 | 600 | 980 | 1,095 | | Oxidation Resistance | Excellent (Haynes family) | Poor above 600°C | Good | Excellent | | Cost per lb | Very High (Proprietary) | High | Moderate | Very High |

But what exactly is Haynes 4.89? Is it a new superalloy, a specific fabrication standard, or a niche product code? In this comprehensive guide, we will dissect every aspect of Haynes 4.89, covering its chemical composition, mechanical properties, primary industrial applications, and how it compares to other materials in the Haynes International portfolio. First and foremost, it is critical to clarify that "Haynes 4.89" is not a standard industry shorthand for a specific grade like "HASTELLOY C-276" or "HAYNES 282." Instead, based on extensive technical documentation and Haynes International’s internal numbering systems, Haynes 4.89 typically refers to a specific material test report (MTR) lot number , a traceability code , or a heat treatment cycle parameter used for high-temperature cobalt or nickel-based alloys. haynes 4.89

Always verify your material certification. In the world of superalloys, a number like "4.89" is never arbitrary—it is the key to performance. Disclaimer: This article is based on publicly available technical data and industry inference. Haynes International is a registered trademark. For official specifications regarding a specific "Haynes 4.89" lot number, contact the manufacturer directly. | Property | Haynes 4