|Name of index||Tec||Index|
|Content (N) >%||21||21.2|
|Residue on Ignition ≤%||0.25||0.08|
Certification of steel grade:
|Inspection Items||Requirement||Inspection Results||Conclusion or not|
|N Content %||≥20.5||20.8||Conformed|
|Free acid %||≤0.2||0.09||Conformed|
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