9.2 : The manufacturer shall provide a certification that the plates meet the requirements of this specification.
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A269/A269M Standard Specification for Seamless and ... - ASTM and Carbon. For example
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The standard dictates the exact percentage of elements such as Chromium, Nickel, Molybdenum, and Carbon. For example, a common grade like 304 stainless under this specification must typically contain between 17.5% and 19.5% Chromium and 8.0% to 10.5% Nickel to ensure the formation of the passive oxide layer that prevents rust.