Haynes 4.89 typically refers to a specific technical reference entry in the CRC Handbook of Chemistry and Physics , edited by William M. Haynes.
1. Introduction
Haynes alloys are nickel- or cobalt-based superalloys designed for high-temperature strength and corrosion resistance. The alloy designated “4.89” is not a standard grade; verification with Haynes International is recommended. Assuming a hypothetical Ni-base alloy with density ~4.89 g/cm³ (low for superalloys), it would likely contain significant aluminum or titanium for gamma-prime strengthening. haynes 4.89
Because Haynes 4.89 is not a standard catalog item, sourcing requires a specialized approach: Haynes 4
Haynes 4.89 would be notoriously difficult to weld due to its high aluminum content (prone to cracking). Investment casting is the primary fabrication method. It is non-magnetic (permeability ~1.02). Tensile strength: 965 MPa (room temp) Yield strength:
The original "Haynes 4.89" reference typically points to the 5 GHz survey of the Southern Milky Way conducted by Haynes, Caswell, and Simons in 1978.
Implications and Applications