... 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.SpecificationRe 0.5-2.0%, Mg 5.0-7.0%, Si 45 ... or SGS Standard GB/T 4138-93 ferro silicon magnesium rare earth alloy(Re-FeSiMg)