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must be measured by his chemical composition to determine his base nature .

specified for each element in the ladle analysis. If a value exceeds the limits below, the steel is classified as an "alloy steel": Limit (by weight) Manganese (Mn) Silicon (Si) Copper (Cu) Chromium (Cr) Nickel (Ni) Molybdenum (Mo) Aluminium (Al) Quality Classes en 10020 pdf

EN 10020 defines stainless as ≥10.5% Cr. It does not guarantee corrosion resistance in all environments. This is a common point of legal confusion. must be measured by his chemical composition to

To distinguish between non-alloy and alloy steels, EN 10020 sets specific weight percentage thresholds for various elements: Limit Value (% by mass) Aluminium (Al) Chromium (Cr) Copper (Cu) Manganese (Mn) Nickel (Ni) Silicon (Si) 2. Main Quality Classes en 10020 pdf