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EC number: 231-096-4 | CAS number: 7439-89-6
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
Melting point - Iron Powder: 1538 °C
Melting point - Iron Furnace: 1150 to 1538 °C dependent upon the carbon content
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 1 538 °C
Additional information
The melting point of pure iron is 1538 °C but this is depressed as the carbon content is increased with the minimum melting point of 1150 °C (eutectic temperature) occurring at 4.3% carbon, the eutectic composition.
Thus, for high purity forms of iron such as iron powder, carbonyl iron etc the melting point will be approximately 1538 °C.
Iron furnace (DRI, HBI and pig iron) will have melting points between 1150 and 1538 °C, dependent upon the carbon content of the material.
For pure iron and for iron products containing 4.3% carbon melting takes place at a fixed constant temperature, but for iron products containing more or less carbon than the eutectic composition melting will take place over a range of temperatures from 1150 °C upwards.
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