17/04/2026
Elements in metallurgy - Nitrogen
🔬 Nitrogen in cast iron – underestimated, but crucial!
Nitrogen (N) is not just a component of the air – in cast iron, too, it influences material properties more than is often realised.
✨ What role does nitrogen play in cast iron?
• Influences microstructure formation during solidification
• Can moderately increase strength
• Affects graphite formation and shape
• Plays a role in porosity and shrinkage cavity formation
⚙️ Controlling the nitrogen content is particularly important in foundry technology, as it enters the melt via the melt flow, raw materials and process conditions.
💡 Important to know:
Excessive nitrogen content can lead to porosity and undesirable microstructural effects – which is why targeted process management is crucial.
👉 Conclusion: Even in cast iron, nitrogen is a minor factor with a major impact – particularly on quality and process reliability in the casting process.
Foundry Engineering Industry
