Specilication:( GB8829-88)
Melting point ,℃≥1st Grade (specification) 80.0 Qualified (specification) 78.0
Reduction in weight after heating, %≤ 1st Grade (specification) 0.50
Qualified (specification) 0.50
Ash,% ≤: 1st Grade (specification) 0.30 Qualified (specification) 0.40
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