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Silicon Manganese

 

       Silicon manganese (SiMn), a ferroalloy with high contents of manganese and silicon, is made by heating a mixture of the oxides manganese oxide (MnO2), silicon dioxide (SiO2), and iron oxide (Fe2O3), with carbon in a furnace. They undergo a thermal decomposition reaction. It is used as a deoxidizer and an alloying element in steel.

 
The standard grade silicon manganese contains 14 to 16% of silicon, 65 to 68% of manganese and 2% of carbon. The low carbon grade SiMn has carbon levels from 0.05 to 0.10%.
 
Grades
Chemical Index %
Mn
Si
C
P
S
Ⅰ 
Ⅱ 
Ⅲ 
≤ 
FeMn64Si27
60.0-67.0
25.0-28.0
0.5
0.10
0.15
0.25
0.04
FeMn67Si23
63.0-70.0
22.0-25.0
0.7
0.10
0.15
0.25
0.04
FeMn68Si22
65.0-72.0
20.0-23.0
1.2
0.10
0.15
0.25
0.04
FeMn64Si23
60.0-67.0
20.0-25.0
1.2
0.10
0.15
0.25
0.04
FeMn68Si18
65.0-72.0
17.0-20.0
1.8
0.10
0.15
0.25
0.04
FeMn64Si18
60.0-67.0
17.0-20.0
1.8
0.10
0.15
0.25
0.04
FeMn68Si16
65.0-72.0
14.0-17.0
2.5
0.10
0.15
0.25
0.04
FeMn64Si16
60.0-67.0
14.0-17.0
2.5
0.20
0.25
0.30
0.05
 
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