OVERVIEW: 100mm High-Explosive Anti-Tank Fragmentation (HEAT-FRAG) rounds are dual-purpose munitions capable of penetrating armor while delivering fragmentation effects against soft targets and personnel. They are optimized for versatility in both anti-armor and general-purpose support roles.

DETAILS: HEAT-FRAG rounds combine a shaped-charge warhead for armor penetration with a fragmentation sleeve or casing that disperses lethal shrapnel upon detonation. This dual-effect makes them suitable for mixed combat environments, where both armored vehicles and infantry or light fortifications may be present. These munitions were commonly used by Soviet and Warsaw Pact tanks and SP guns equipped with 100mm guns.

SPECIFICATIONS:
Caliber: 100mm
Type: HEAT-FRAG (High-Explosive Anti-Tank – Fragmentation)
Warhead: Shaped charge with pre-fragmented casing
Penetration: ~300–400 mm RHA (depending on variant)
Fuze: Point-detonating with optional delay
Muzzle Velocity: ~900 m/s
Effective Range: 1,000–2,500 m
Platforms: T-55, MT-12, SU-100, and similar systems

NOTES:
Trade-off between armor penetration and blast/fragmentation effectiveness.
Capable of engaging light vehicles, infantry, bunkers, and older-generation armored threats.
May be less effective against composite or reactive armor.

SOURCE:
Soviet/Russian ordnance data
https://www.military-today.com
https://en.wikipedia.org/wiki/High-explosive_anti-tank_warhead