Paris law cofficients of 20MnMoNi55 steel or SA508 steel

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The discussion focuses on the need for Paris Constants 'C' and 'm' for 20MnMoNi55 and SA508 steel at room temperature in an air environment. It highlights that these constants can vary based on the steel's composition, microstructure, and impurity levels. A reference link is provided for further information on SA508 steel. Participants are encouraged to share any specific data or insights they may have. The conversation underscores the importance of understanding these constants for material performance analysis.
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If anybody knows the Paris Constants 'C' and 'm' for either 20MnMoNi55 or SA508 steel at room temperature and in air environment, please hep me out.
 
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sonika chauhan said:
If anybody knows the Paris Constants 'C' and 'm' for either 20MnMoNi55 or SA508 steel at room temperature and in air environment, please hep me out.
Apparently C and m will vary with composition and microstructure, and impurity levels.

Here is some discussion regarding SA508
https://opus.lib.uts.edu.au/research/bitstream/handle/10453/13663/2006013063.pdf?sequence=1
 
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