Engineering:High-explosive incendiary
In warfare, high-explosive incendiary (HEI) is a type of ammunition specially designed to impart energy and therefore damage to its target in one or both of two ways: via a high-explosive charge and/or via its incendiary (fire-causing) effects. Each round—by definition—has both capabilities.[1]
HEI ammunition is fused either mechanically or chemically. The armor-piercing ability can vary widely, allowing for more focused fragmentation or larger scatter.[citation needed]
History
HEI ammunition was originally developed for use in large-caliber cannon, howitzer and naval artillery. Currently, HEI rounds are most commonly made in medium-caliber sizes of 20, 25, 30, and 35 mm. They are fired from various platforms, including aircraft, anti-aircraft cannons, and anti-missile systems.[citation needed]
HEI ammunition has also been used on the battlefield against tanks and other armored vehicles, but mostly in a last ditch attempt to disable external components. [citation needed]
Uses

HEI rounds are mainly used in incendiary rounds against softer targets such as aircraft, infantry, and unarmored vehicles.[citation needed]
See also
- High explosive incendiary/armor piercing ammunition (HEIAP)
- Mine shell
- Raufoss Mk 211
References
- ↑ Lee, R. Geoffrey (1991) (in en). Defence Terminology. Brassey's (UK). p. 95. ISBN 978-0-08-041320-4. https://www.google.co.uk/books/edition/Defence_Terminology/B1zfAAAAMAAJ.
External links
| Wikimedia Commons has media related to Ammunition. |
- Live fire experiment of mechanically fuzed HEI rounds
- Example of US military 30 mm HEI round
- Example of NATO 35×228mm HEI round from Nammo
- Fragmentation pattern of a German Round
