Rahim Group – Rahim Steel Mills Founded in 1958, Rahim Group is one of the leading steel manufacturers of Bangladesh. Rahim Group : Rahim Steel Mills Co. (Pvt.) Ltd., Diamond Steel Products Co. (Pvt.) Ltd., Sonargaon Steels Ltd., Rahim Super Extreme Limited, Ferro Alloy Co. (Pvt) Ltd., Carbon Bangladesh (Pvt.) Ltd., and Rahim Energy Ltd.