For whats worth, German data in general attribute 15% loss of resistence to CHA if compared to similar thickness RHA. Generally, the difference was attributed to lack of cross rolling, which helps orienting the crystal structure of the metal matrix. This lead to considerable differences in reference nominal resistence of plate (=G(s) in german parlance, with only a smooth bulge allowed on the back side but no cracks or spall emitted form the backside of the plate) when attacked obliquiely by APC.
As a further notice, mastering thick RHA or CHA armor was not a trivial achievement. It was extremely difficult to translate lab knowledge into applicable mass production techniques. Large section thoicknesses don´t cool quickly internally and this can cause temper brittleness. In order to retain ductility, all manufacturers added relatively high% of Nickel, which was an effective toughening agent in thick sections. However, large amounts of Ni also increase the chance of temper embrittlement from secondary and tertiary reheating exposure such as welding. That was even moreso if the heat had elevated impurities (sulpur and phosphorus) or other hardening but also embrittling agents (like manganese and silicium, among others).
The Germans largely resorted back to Krupps expensive Ni/Cr steel for the thickest section plates to adress these issues and developed very clean electrosteel (low impurities) with very complex multi stage thermo-mechanical treatment to create weldable medium section thickness plate. Even then, the welding had to be done interlocked to provide constructive resistence if the weld seam broke.
Allied tank armor, quality control
Discussions on the vehicles used by the Axis forces. Hosted by Christian Ankerstjerne
-
- Member
- Posts: 733
- Joined: 13 Jun 2017 14:53
- Location: central Europe
Re: Allied tank armor, quality control
Post by critical mass » 31 Dec 2022 17:54
Return to “The Ron Klages Panzer & other vehicles Section”
Jump to
- Axis History
- ↳ Life in the Third Reich & Weimar Republic
- ↳ Propaganda, Culture & Architecture
- ↳ Music of the Reich
- ↳ Women in the Reich
- ↳ Heer, Waffen-SS & Fallschirmjäger
- ↳ Model building
- ↳ U-Boats
- ↳ Kriegsmarine surface ships and Kriegsmarine in general
- ↳ Luftwaffe air units and Luftwaffe in general
- ↳ Model building
- ↳ Legion Condor
- ↳ German Strategy & General German Military Discussion
- ↳ NSDAP, other party organizations & Government
- ↳ The Phil Nix SS & Polizei section
- ↳ The Dieter Zinke Axis Biographical Research Section
- ↳ Japan at War 1895-1945
- ↳ Italy under Fascism 1922-1945
- ↳ Minor Axis Nations
- ↳ Finland
- ↳ Foreign Volunteers & Collaboration
- ↳ Holocaust & 20th Century War Crimes
- Axis Equipment
- ↳ Aircraft
- ↳ Fortifications, Artillery, & Rockets
- ↳ Model building
- ↳ The Ron Klages Panzer & other vehicles Section
- ↳ Model building
- ↳ Panzer & other vehicles - Photo threads
- ↳ Model building
- ↳ Small Arms
- ↳ Other Equipment
- Militaria & Collecting
- ↳ Axis Awards
- ↳ Militaria for sale
- ↳ Axis Documents, Feldpost numbers, Postcards & Other Paper Items
- ↳ Militaria for sale
- ↳ Axis Uniforms, Headgear & Insignia
- ↳ Militaria for sale
- ↳ Other WW1 & WW2 Militaria
- ↳ Militaria for sale
- ↳ For Sale & Wanted
- ↳ Reproductions Sales
- The Allies & the Neutral States
- ↳ China at War 1895-1949
- ↳ France 1919-1945
- ↳ Poland 1919-1945
- ↳ The Soviet Union at War 1917-1945
- ↳ The United Kingdom & its Empire and Commonwealth 1919-45
- ↳ USA 1919-1945
- ↳ The Allies and the Neutral States in general
- World War II and Inter-War Era
- ↳ WW2 in Africa & the Mediterranean
- ↳ WW2 in Eastern Europe
- ↳ WW2 in Western Europe & the Atlantic
- ↳ WW2 in the Pacific & Asia
- ↳ Winter War & Continuation War
- ↳ Spanish Civil War & Legion Condor
- ↳ Economy
- Other Eras
- ↳ First World War
- ↳ Imperial Germany
- ↳ German Colonies and Overseas Expeditions
- ↳ Austria-Hungary 1867–1918
- ↳ The end of the Ottoman Empire 1908-1923
- ↳ Other eras
- Research Help
- ↳ Translation help: Breaking the Sound Barrier
- ↳ Books & other Reference Material
- ↳ Archives
- Other areas
- ↳ Model building
- ↳ Movies, games & other fiction
- ↳ What if
- ↳ Reenactment