When considering substitutions between materials, what aspects should be taken into account?
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In practical engineering projects, there are many cases of material substitution. Besides using the same type of material, higher-grade materials may be used in place of lower-grade ones; there is also substitution between different types of materials. What aspects should be considered when there is substitution between different materials? Sailors, please give some advice
Generally, within the same category, substitution from a higher level to a lower level exempts it from evaluation, while substitution in other categories requires a technical assessment.