Hoganas India Pvt Ltd. Supplies Sponge Iron Powders for Chemical and Metallurgical Applications. Hoganas India Pvt Ltd. Has obtained ISO/TS 16949:2009 certifications. Sponge Iron Powders for Chemical and Metallurgical Applications is produced through solid-state reduction, which results in sponge-like particles with high surface area and internal porosity. Sponge Iron Powders for Chemical and Metallurgical Applications is available in unannealed state where the typical iron content is 98.5%. However, after annealing the percentage increases to over 99%. The particle sizes of this powder vary from fine to coarse.