... min , Si 0.025%max , Al 0.02%max , Fe 0.04%max Cu 0.004%max 500g magnesium metal with purity 99.90% ... minThe BEST price for Magnesium Metal 99 ... underground tanks, pipelines, buries structures, and water heaters. Magnesium Metal(Ingot)Spec Chemical composition %MG≥ othersFeSiNiCuAlMnCTiPbZnOther each impurityMg999999.990.0050 ...