tag:blogger.com,1999:blog-5030145265861917845.post6119753745674319163..comments2024-03-20T11:41:56.776-04:00Comments on Tank Archives: Nickel-Free ArmourPeterhttp://www.blogger.com/profile/09622237223229485503noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-5030145265861917845.post-79830970803981245292016-09-14T04:35:48.662-04:002016-09-14T04:35:48.662-04:00Nickel in steel alloy is benefitial by allowing a ...Nickel in steel alloy is benefitial by allowing a larger degree of toughening. Nickel-free armor is perfectly feasable but requires certain other alloying agents, such as copper (in small amounts), boron (in tiny amounts) or chromium (in small amounts)and -ideally- molybdenium plus a specific heat treatment sequence. Enhanced skills in metallurgy are required to reduce as much as possible exposure to the brittle tempering temperature range (depending on section thickness and alloys present, either a very slow cooling or a very rapid quench). Ni-free armor is highly suspect of temper embrittlement due to the presence of chromium or boron. <br />Plus, it´s only feasable within a very narrow range of section thicknesses (50mm being the thickest practicable section thickness without massive loss in ductility or toughness).<br />Ni-free, full armor grade homogenious steel was patented by Krupp 1932 and information of this material was passed to the soviets in the years of cooperation between Hitler and Stalin.<br /><br />In Germany, these armor steels were classified as thermo-mechanically treated steel (requiring hot rolling, annealing, hot rolling,...) and were mainly applied in thin sections of vehicle and screen armor to provide protection without or with much reduced nickel content for early and mid war PzII-IV. <br /><br />Do You happen to have the date of the document and informations in regard to MZ-2 and MZ-5 steel composition?critical masshttps://www.blogger.com/profile/02366274198749901618noreply@blogger.com