5. Conclusion
Increase in tempering time leads to an embrittlement domain
and hence reduced the toughness of the studied steel tempered
at 300 ◦C. In case of 7.62 mm AP projectiles, hardness and
strength of the material are important for ballistic performance.
In 12.7 mm AP projectiles apart from strength and hardness,
the Charpy impact value plays a significant role in determining
the ballistic performance. Therefore studies on ballistic performance
of materials against lower calibre projectiles cannot be
extended for larger calibre projectiles even at similar velocities