OVERVIEW: The 100mm High-Explosive Anti-Tank (HEAT) round is designed to defeat armored vehicles using a shaped-charge warhead that focuses explosive energy into a high-velocity metal jet. It became a mainstay anti-armor solution for tanks and anti-tank guns from the 1950s onward.

GENERAL DESCRIPTION: HEAT rounds use a conical liner—typically copper—shaped to form a focused plasma jet upon detonation. Unlike kinetic rounds, HEAT penetration is independent of range or velocity. These rounds were used extensively by tanks like the T-54/55 and SU-100, and remained relevant until the widespread use of composite and reactive armor. Variants include fixed-type rounds for tank guns and separate-loading rounds for field artillery systems.

ROLE SUMMARY:
Category: Tank Gun Ammunition
Primary Use: Anti-armor
Function: Shaped charge penetration via high-explosive anti-tank effect
Strong Against: Armored vehicles, fortifications, light bunkers
Weak Against: Reactive armor, composite armor, active protection systems
Platform: Tanks and assault guns equipped with 100mm guns
Integration: Compatible with 100mm rifled or smoothbore tank gun systems

SOURCE:
Soviet/Russian ordnance manuals; https://www.tankarchives.ca/; https://en.wikipedia.org/wiki/High-explosive_anti-tank_warhead