How to Normalize the Temperature for Carbon Steels
Normalizing steel is the process of heating steel to the point where all the internal stress releases. It also involves heating the steel until the carbon fully dissolves in the crystalline steel structure, which requires specific heat and time to ensure full, normalized steel. The greater the carbon content, the higher the temperature and the longer the time needed to normalize the steel correctly. Does this Spark an idea?
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Instructions
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Place the steel in a heat treat oven and raise the steel's temperature to the normalizing temperature that corresponds to the particular type of steel. Reference a heat treat chart or raise the temperature until the steel becomes nonmagnetic.
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Hold the steel at the normalizing temperature until the entire piece is at the same temperature. Generally, one hour per inch of length is sufficient, but larger pieces may require a longer soak time.
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Remove the steel from the furnace and allow it to cool slowly. The longer it takes the steel to cool, the better. One technique is to shut off the heat treat oven and let the steel cool within the oven. However, letting the piece cool in the air still normalizes the steel.
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Tips & Warnings
Metallurgy reference books are available at most libraries and list specific temperatures and soak times for most types of steel.
Normalizing requires very high heat and can be a dangerous process. Proper safety equipment and procedures are necessary to prevent injury.
References
Resources
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