DIL L75 VS – Iron – Thermal expansion

Pure Iron – Thermal expansion / curie point

Iron stands as one of the most widely utilized construction materials and is among the most abundant metals globally. Given that all steels primarily consist of iron, it follows that a significant proportion of vehicles and buildings are constructed using this versatile metal.

The mechanical properties of iron are pivotal in rendering it an ideal material for diverse applications. Its noteworthy hardness, stability, ease of handling, and the capacity for forging in an open fire contribute to its widespread use.

While most steels incorporate various other metals and varying amounts of carbon, providing a spectrum of properties such as color, hardness grade, and chemical resistance, iron itself is a well-known material. Consequently, the analysis of iron and steels is one of the most prevalent applications in thermal analysis.

App. Nr. 02-001-002 DIL L75 VS – Iron – Thermal expansion

The provided measurement illustrates the linear thermal expansion (relative ΔL – red curve) and the coefficient of thermal expansion (CTE – blue curve) of an iron sample under an argon atmosphere. The heating rate employed was 5 K/min. Notably, above 736.3°C (the maximum of CTE), shrinkage is observed, attributed to a phase change effect known as the Curie point. Discrepancies between measured and literature values are ascribed to sample contamination and the presence of trace elements.

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