Aphe Projectiles

Some articles on projectiles, aphe, projectile:

Armor-piercing Shot And Shell - Second World War
... During World War II, projectiles used highly alloyed steels containing nickel-chromium-molybdenum, although in Germany, this had to be changed to a silicon-manganese-chromium-based alloy when those ... or resulted in total penetration failure for armor-piercing high-explosive (APHE) projectiles, this could result in premature detonation of the HE filling ... methods of differentially hardening the projectile were developed during this period, especially by the German armament industry ...