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From 6Mo To Ni-Base – Characterizing The Corrosion Performance Of Two Important Material Groups

Stainless steels and Ni-base alloys are often considered as construction materials in applications where highly corrosive conditions are expected. High levels of halides, low pH and high temperatures are factors that often contribute to the selection of such materials.

Ten different alloys have been included in this work, representing a range of highly alloyed stainless steels and Ni-base alloys. The purpose has been to evaluate the corrosion resistance of stainless steels with alloying content in the 6Mo range or higher, and competing Ni-base materials. The austenitic grade N08904 and two super-duplex grades have also been included for reference. 

Product Number: 51322-17935-SG
Author: Björn Helmersson
Publication Date: 2022
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$20.00
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Over the years, the gap between stainless steels and Ni-base alloys has become increasingly diffuse, not only in terms of chemical composition but also when considering performance in corrosive service conditions.  While Ni-base alloys can sometimes be considered the safe choice, alternatives with a lower nickel content are often more cost efficient. Due to advances in material technology and the always-increasing knowledge about material performance, high-alloyed stainless steels can indeed be attractive and competitive materials of choice for highly corrosive service conditions. 

Over the years, the gap between stainless steels and Ni-base alloys has become increasingly diffuse, not only in terms of chemical composition but also when considering performance in corrosive service conditions.  While Ni-base alloys can sometimes be considered the safe choice, alternatives with a lower nickel content are often more cost efficient. Due to advances in material technology and the always-increasing knowledge about material performance, high-alloyed stainless steels can indeed be attractive and competitive materials of choice for highly corrosive service conditions. 

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