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UNS N19903

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PRINCIPAL DESIGN FEATURES
A Nickel-Cobalt alloy with Niobium intended for high temperature strength and oxidation resistance.
 
APPLICATIONS
Gas turbine hot section components.
 
FORMING
This alloy has good ductility and may be readily formed by all conventional methods. Because the alloy is stronger than regular steel it requires more powerful equipment to accomplish forming. Heavy-duty lubricants should be used during cold forming. It is essential to thoroughly clean the part of all traces of lubricant after forming as embrittlement of the alloy may occur at high temperatures if lubricant is left on.
 
WELDING
The commonly used welding methods work well with this alloy. Matching alloy filler metal should be used. If matching alloy is not available then the nearest alloy richer in the essential chemistry (Ni, Co, Cr, Mo) should be used. All weld beads should be slightly convex. It is not necessary to us

 Limiting Composition, wt % of UNS N19903
Nickel ..........................................................................36.0-40.0
Cobalt..........................................................................13.0-17.0
Aluminum ....................................................................0.30-1.15
Titanium.......................................................................1.00-1.85
Niobium.......................................................................2.40-3.50
Iron ...............................................................................Balance
 

 
 
 


UNS N19903

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