On December 12, Hans Kellner defended his thesis in the field of Material Sciences: his thesis was entitled "Study of Non-Metallic Inclusions in Alloy 825".
In his research, Hans Kellner examined how the quality of steel is affected by the impurities that can be found in various materials that are used in the process of steel manufacturing.
Hans Kellner defended his thesis on December 12 at the Kungliga Tekniska Högskolan in Stockholm.
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