THERMAL STABILITY
HAYNES® 230® alloy exhibits excellent retained ductility after long-term thermal exposure at intermediate temperatures.  It does not exhibit sigma phase, mu phase, or other deleterious phase formation even after 16,000 hours of exposure at temperatures from 1200 to 1600°F (649 to 871°C). Principal phases precipitated from solid solution are all carbides. 

This contrasts markedly with many other solid-solution-strengthened superalloys such as HAYNES 188 alloy, HAYNES 625 alloy, and HASTELLOY® X alloy. These alloys all precipitate deleterious phases, which impair both tensile ductility and impact strength. 
 
 

Room-Temperature Properties after Thermal Exposure (Plate)

Comparative Room-Temperature Impact Strength

 

HAYNES® 230® alloy Home Page  
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ASME Vessel Code  
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Resistance to Grain Growth 		 Physical Properties  
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Nitriding  
Carburization  
Field Experience 
Hydrogen Embrittlement  
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Microstructure 		 Welding  
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230® alloy Trademark 
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