## How to Tell Cast Iron from Steel?
Cast iron is an iron-carbon alloy with carbon content exceeding 2.11%. It features high hardness and vibration damping, but brittleness:
- **Hammer Test:** Fractures with a dull thud rather than bending.
- **Spark Test:** Short, dull red sparks clustered close to the wheel.
### Common Items:
Radiators, bathtubs, machinery castings, brake discs.
Immediate cash payouts at Górecka 6, Poznań.
How to Identify and Value Machinery vs Commercial Cast Iron? Radiators and Stoves Scrap in Poznań
Cast iron is one of the most sought-after ferrous scrap materials due to its high density and solid market value. Learn how to distinguish cast iron from steel and how much you can earn from old radiators.
Published: 6 October 2026