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C30 - HC300EK: structural cold rolled steel for enamelling with guaranteed minimum yield strength after enamel firing
One of our clients’ key objectives is to lower the cost of enamelled parts. Reducing the thickness of the steel used can contribute to this aim, leading to substantial savings. However, enamel firing at high temperature causes deformation of parts, which becomes more significant as steel thickness decreases. The use of cold rolled steel for enamelling with guaranteed minimum yield strength after enamel firing eliminates this problem.
HC300EK is a cold rolled enamelling steel grade with guaranteed minimum yield strength that retains its mechanical properties after deformation and enamel firing. This grade can be used for both one-side and two-side enamelling.
Advantages
The use of HC300EK grade enables steel thicknesses to be reduced whilst avoiding deformation of the parts after enamel firing. This grade can replace hot rolled steel in the manufacture of water heater tanks. After manufacture, parts like these are generally subjected to a cyclic fatigue test under pressure, during which they must not be deformed. The use of HC300EK grade thus makes it possible to reduce thicknesses to a lower level than is possible with hot rolled steel.
Applications
HC300EK grade is particularly suitable for the manufacture of water heater tanks. It can also be used for flat parts for household items (dripping pans, baking trays) and shower trays or for manufacturing architectural panels for building interiors or exteriors.
Recommendations for use
Forming
HC300EK grade can be formed by bending, profiling or light drawing.
Joining
HC300EK grade can easily be welded, whatever the welding process may be. Other joining processes (clinching, crimping) may also be used.
Enamelling
Surface treatment:
The parts must be degreased before enamelling. When enamel containing a low level of adhesion oxides is used (e.g. water heater tank using Ni-free enamel), sand blasting or pickling may be necessary.
Enamel application and firing:
HC300EK grade is compatible with all the common enamelling processes: wet spraying, electrostatic liquid or powder enamelling. Both ground and conventional enamelling processes are feasible.
Where wet application is used, it is imperative to dry the enamel layer before firing.
All details provided in the ArcelorMittal Flat Carbon Europe S.A. catalogue are for information purposes only. ArcelorMittal Flat Carbon Europe S.A. reserves the right to change its product range at any time without prior notice.
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