Haynes 230

Haynes 230 (UNS N06230 / W.Nr.2.4733) is a carbide strengthened nickel-chromium-tungsten-molybdenum alloy with an exceptional combination of strength, stability, and resistance tocorrosion at very high temperatures. Alloy N06230offers particularly good resist-ance to oxidation attemperatures greater than 1800°F (980°C). It also offersgood resistance to carburization and nitridation.The limiting composition of alloy N06230 is listedin Table 1. The alloy is nickel-base. Chromium impartsresistance to high temperature corrosion. Oxidation isfurther enhanced by a micro-addition of the rare earthelement, lanthanum. Tungsten and molybdenum incon -junction with the alloy’s high carbon content arelargely responsible for the strength of the alloy. Thecreep resistance of alloy N06230 is optimized bycontrol of the boron content.The combination of high temperature strength andresistance to creep, stress rupture, and corrosion makethe alloy attractive for service at temperatures above1800°F (980°C). Potential applications includeequipment and co-mponents for land-based gas turbines,thermal and petrochemical processing, heat treating,and ore and metal refining.

Easily Fabricated 

HAYNES® 230® alloy has excellent forming and welding characteristics. It may be forged or otherwise hot-worked, providing it is held at 2150°F (1177°C) for a time sufficient to bring the entire piece to temperature. As a consequence of its good ductility, 230® alloy is also readily formed by coldworking. All hot- or coldworked parts should be annealed and rapidly cooled in order to restore the best balance of properties. The alloy can be welded by a variety of techniques, including gas tungsten arc (GTAW), gas metal arc (GMAW), and resistance welding. 

Heat-Treatment 

Wrought 230® alloy is furnished in the solution heat-treated condition, unless otherwise specified. The alloy is solution heat-treated in the range of 2150 to 2275°F (1177 to 1246°C) and rapidly cooled or water-quenched for optimum properties. Annealing at temperatures lower than the solution heat-treating temperatures will produce some carbide precipitation in 230® alloy, which may marginally affect the alloy’s strength and ductility. 

Castings 

HAYNES® 230® alloy may be cast using traditional air-melt sand mold or vacuum-melt investment casting foundry practices. Silicon levels at the high end of the specification range are recommended for enhanced fluidity. Castings may be used in either the as-cast or solution-heat-treated condition depending upon property requirements 

Principal Features Continued

Applications 

HAYNES® 230® alloy combines properties which make it ideally suited for a wide variety of component applications in the aerospace and power industries.

It is used for combustion cans, transition ducts, flame holders, thermocouple sheaths, and other important gas turbine components. In the chemical process industry, 230® alloy is used for catalyst grid supports in ammonia burners, high-strength thermocouple protection tubes, hightemperature heat exchangers, ducts, high-temperature bellows, and various other key process internals. In the industrial heating industry, applications for 230® alloy include furnace retorts, chains and fixtures, burner flame shrouds, recuperator internals, dampers, nitriding furnace internals, heat-treating baskets, grates, trays, sparger tubes, thermocouple protection tubes, cyclone internals, and many more.

For more information and consultation, contact us here!

WhatsAPP:+86 13414139830

Phone: +86 13414139830

E-mail: Sia@kesugroup.com