Ballistic testing with steel alloy

FOI has been commissioned by FMV to evaluate the projective capability of a cast steel alloy (referred to here as HF-steel) using the ammunition 7.62 mm x 39 API BZ. A first attempt to determine the limit velocity was performed in 2013. The targets consisted of a backing plate of Armox 440T on which a number of HF-steel plates were soldered. Due to soldering failure, several plates came of already at the first impact which made father tests impossible. A second series was performed in 2014 where the limited velocity was determined in a more structured way using 20 equal targets. The target consisted of a backing plate of Armox 500T on which a plate of HF-steel was glued. A slightly altered adhesion method (surface soldering) was also evaluated. Unfortunately, the plates fell off, partially or completely, in these trials.