Steel plates for enamel mainly refer to low-carbon steel plates, which must meet the following conditions:

1. The carbon content is below 0.02%.

2. The surface composition is uniform.

3. No cracks, wrinkles and distortions occur during stamping, stretching and forming.

4. It is easy to weld and weld by ordinary methods.

5. No delamination, bubbles and surface defects.

6. Easy to clean, degrease and pickle.

7. It can not be distorted and deformed during firing, and there are not many bubbles produced.

Chemical composition of steel plate for enamel (weight%). (The rest is iron Fe)

Steel type JIS C carbon Mn manganese P phosphorus S sulfur Al aluminum Ti titanium Si silicon

Pure iron 0.02 0.04 0.010 0.016 0.008 0.001 0.1

Titanium steel 0.05 0.31 0.010 0.028 0.017 0.310 0.10

Unclean cold rolled steel SPCC 0.07 0.34 0.015 0.018 0.006 0.001 0.1

Very low carbon steel SPP 0.003 0.33 0.011 0.013 0.008 0.001 0.008

Pure iron is a steel plate for enameling developed by the United States. It has less sagging and few enamel defects. It has been used in the United States for a long time and is the most suitable steel plate for enameling. However, due to other impurities Less, processing and stretching is not easy, the price is too high, so its use is limited.

Titanium steel uses titanium as a deoxidizer, which has the advantage of preventing hydrogen and carbon dioxide from overflowing during heating, so as to obtain a good enamel quality. At the same time, it can be directly applied with surface glaze without applying primer. It was successfully developed in the United States in 1947, but it was too expensive to be popularized.

Zero-carbon steel (extremely low-carbon steel plate) (SPP) was introduced to the market in 1959. Due to its very low carbon content, the steel plate sags very little during firing, and it has excellent workability and the advantages of not easy to produce enamel defects. The price is not expensive, so it can be said that it is the most suitable steel plate for enamelling.