Magnesium Ferrosilicon

Magnesium Ferrosilicon is added to molten cast iron in order to convert the graphite shape from a flake network found in gray iron to spheroidal for ductile iron. The evenly distributed graphite spheres or nodules greatly increase the cast irons strength and give ductile iron elongation prior to failure. Hickman, Williams & Company offers many varieties of Magnesium Ferrosilicon Alloys. From a 3 to 4 percent magnesium alloy for minimal reactivity and high magnesium recovery, to the standard 5 to 6 percent magnesium alloy for normal practices. Both magnesium levels of this alloy are also available in multiple rare earth ranges and compositions. 

Product 

Mg %

Si %

Ca %

Al %

Mn %

TRE %

magnesium ferrosilicon treatment alloys

rare earth free grades

hw-mag 3

hw-mag 5

cerium bearing grades

hw-mag 5l

hw-mag 5m

hw-mag 5mho

hw-mag 5h

2.9-3.4

5.5-6.5

44-48

44-48

0.8-1.35

0.8-1.35

1.25 max

1.25 max

5.5-6.5

44-48

0.8-1.35

5.5-6.5

44-48

0.8-1.35

5.5-6.5

5.5-6.5

44-48

44-48

0.3 max

0.8-1.35

1.25 max

1.25 max

0.30 max

1.25 max

0.30-0.40

0.45-0.70

0.45-0.70

0.90-1.25

blended rare earth grades

hw-mag 3la

hw-mag 3laft

hw-mag 5la

hw-mag 5lb

hw-mag 5lb

calcium modified grades

hw-mag 4lbhc

hw-mag 5lbhc

Product 

magnesium ferrosilicon treatment alloys

3.0-3.8

44-48

0.8-1.35

1.25 max

3.0-3.8

44-48

0.8-1.35

5.5-6.5

5.5-6.5

5.5-6.5

44-48

44-48

44-48

0.8-1.35

0.8-1.35

0.8-1.35

1.25 max

1.25 max

1.25 max

1.25 max

4.5-5.5

5.5-6.5

44-48

44-48

1.8-2.25

0.8-1.35

1.25 max

1.25 max

1.50-2.20

1.30-1.80

0.50-0.85

0.75-1.10

1.25-1.75

0.50-0.85

0.50-0.85

Standard Sizing

standard industry sizes including stream treatment applications