What is the shot put ball made of?

What Is a Shot Put Ball Made Of?

The shot put ball is known as a shot and can be made from several different types of material. The materials and design are more specialized than you might think.

Materials Used in a Shot Put Ball

Cast Iron

One of the most common materials for a shot put ball is cast iron. It’s  affordable, and widely used for training purposes. Cast iron shot puts are generally unturned (rougher surface) or lathe-turned (smoother surface for a consistent grip).

Lathe Turned Iron Shot Put

Precision-machined iron shot put turned on a lathe to ensure exact diameter. Excellent for training and competition. Quality shot at a reasonable price.

Steel

For higher-level competition,  steel is a popular choice, it is long-lasting, and can be made with precise diameter tolerances. Many competition-approved shot puts are steel because they meet exact weight and size standards. The Polanik Steel Shot is one of the most trusted brands.

Brass

Brass shots are less common but are used in certain competitions due to their density, which allows for a smaller diameter while maintaining the required weight. This can give throwers with smaller hands a better grip. Nordic has a matte finished brass shot put that is very popular.

Ductile Iron 

Made in Sweden by Nordic, the Ductile Iron Valhalla shots are machined turned and perfectly balanced. Ductile iron is the strongest material used in shot put production.

Indoor Shot Put Balls
Indoor shots are often made from synthetic rubber or vinyl coating with lead or other materials mixed inside. Crafted with the most durable plastic in the industry, they provide a secure grip and consistent feel while resisting wear.

Why the Material Matters

• Diameter: Denser materials (like brass) allow smaller shot puts of the same weight.

• Grip: Smoother lathe-turned surfaces offer a more consistent release.

• Durability: Steel and brass resist rust, while coated options are better for indoor training.

Final Thoughts

Whether you’re a beginner or an elite thrower, knowing what a shot is made of can help you choose the right one for your training or competition. Cast iron is great for general use, steel and ductiile iron is ideal for top performance. Plastic indoor shots are best for  training ans competing inside. Picking the right material and diameter can make a real difference in throwing results.