At 4.89 g/cm³, Haynes 4.89 is lighter than titanium alloys (Ti-6Al-4V is 4.43) but operates at temperatures 300°C higher. This makes it ideal for gas turbine blades in the last high-pressure stage where centrifugal loading is critical.
A: Not in the sense of Hastelloy or Monel. It is almost certainly an internal development code or a very specific customer specification. It is not listed in any major standards (AMS, ASTM, UNS). haynes 4.89
To understand "Haynes 4.89," we must first look at how Haynes International categorizes its products. Standard Haynes alloys include the Hastelloy family (B, C, G, X series), Haynes 188 (cobalt-based), and Haynes 214, 230, 242, and 282. These have well-documented densities ranging from 8.2 to 9.2 g/cm³. Given the scarcity of public data, the most
However, 4.89 g/cm³ is significantly lower—closer to titanium (4.5 g/cm³) or advanced aluminum-lithium alloys than conventional nickel superalloys. Therefore, "Haynes 4.89" likely refers to one of three possibilities: Given the scarcity of public data
Given the scarcity of public data, the most plausible interpretation is that Haynes 4.89 is a low-density, high-temperature structural alloy developed for rotating machinery where inertia must be minimized.