Ferro silicon magnesium produced with calcium, magnesium, rare earth alloy configuration, ... in China are professional manufacturer of ferro silicon,ferro silicon magnesium,calcium silicon,ferro silicon barium,ferro silicon aluminum,ferro silicon magnesium cored wire,caclium silicon cored wire and so on. ... Inspection CIQ or SGS Standard GB/T 4138-93 ferro silicon magnesium rare earth alloy(Re-FeSiMg)