"REPORT on the testing of 45 mm subcaliber armour piercing shells with experimental bimetallic cores, blueprint #3-07955
The trials are done above quota, according to paragraph 1 of the work plan of the Special Group of the AK GAU KA for 1942, presented for approval to the Chief of the AK GAU KA as #001132 on May 19th, 1942.
Over the period between May 28th and June 6th, 1942, the Special Group of the AK GAU KA performed experiments on potential partial replacement of tungsten with steel in cores made from the Reniks-6 metallo-ceramic alloy (with a tungsten carbide core) in subcaliber armour piercing shells on blueprint #3-07955.
In the first trial, the idea of a core with two heterogeneous metals was tested: the tip made of the Reniks-6 tungsten alloy, used in mass produced 45 mm APCR, and the rest of the cylindrical part from steel. The joint was done by welding with a copper base. The first trials attempted to remove 50-60% of the tungsten from the core.
1. Production of experimental bimetallic cores
Figure 1 shows the bimetallic core, which was selected for trials.
- Tungsten tip: ~100 grams
- Cylindrical metal part: ~90 grams
- 190.6 g
- 182.7 g
- 186.2 g
- 180.7 g