List of Articles Hardened steel Open Access Article Abstract Page Full-Text 1 - Experimental Study on Surface Roughness and Flatness in Lapping of AISI 52100 Steel Masoud Farahnakian H. ُُShahrajabian Open Access Article Abstract Page Full-Text 2 - Experimental Study of the Cutting Parameters Effect on Hole Making Processes in Hardened Steel Navid Molla Ramezani Mojtaba Rezaei Hajideh Ali Shahmirzaloo