Nickel (Ni)

Nickel stabilizes the structure of cast iron, prevents hardening, and increases ductility. Too much nickel can cause embrittlement.

Physicochemical Mechanism of Action

Nickel acts as a stabilizing element in cast iron by refining the grain and preventing hardening. It forms a layer on the iron surface that blocks oxygen and other chemical reactions.

Metallurgical Relevance & Welding Risks

Too high a nickel content can lead to embrittlement, which makes the structure uneven and reduces strength. This increases the susceptibility to cracking and alters the mechanical properties of the weld.

Workshop Practice & Action Guidelines

Use nickel in small amounts (approx. 0.1 to 0.5 %) to stabilize the structure. If used excessively (above 1 %), embrittlement can occur. Monitor melt time and temperature closely to ensure even cooling.

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