Stahlkern

Stahlkern is a term used in ballistics to describe a projectile core made of steel. In many ammunition designs, the steel core is paired with a jacket to form an armor-piercing round. The higher hardness of steel compared with lead or copper allows the projectile to better resist deformation during high-velocity impact, improving its ability to penetrate harder targets such as armor plates, reinforced concrete, or other barriers.

Construction and variants: A Stahlkern typically resides inside a metallic jacket, producing a penetrator that concentrates kinetic energy along the core. The term is often contrasted with lead-core (Bleikern) ammunition or with cores of other hard materials such as tungsten. Some designs use a steel core in combination with a steel jacket (Stahlmantel) or with various jacket configurations to optimize aerodynamics and penetration.

Applications and history: Steel-core projectiles emerged with the development of armor-piercing ordnance in the late 19th and early 20th centuries and became prevalent in many military calibers during the 20th century. The exact performance depends on velocity, target material, and overall cartridge design. In contemporary contexts, steel-core ammunition remains a specialized category in some jurisdictions.

Regulatory and safety notes: The use of armor-piercing or steel-core ammunition is restricted in many countries for civilian ownership and use, due to its potential to defeat armor and protective barriers. Regulations vary by country.

See also: Armor-piercing round, Armor-piercing ammunition, Core materials in ammunition, Stahlmantel.