Aluminum circle for rice cooker

Haomei aluminum circle for rice cooker is of alloy 1050, 1060, 1100 or 3003. The thickness is 0.36mm to 5.0mm, and diameter 80mm to 1200mm. Tempers of the aluminum circle for cooker include O, H12, H14, H22, H24 etc. The most popular alloys are 1060 and 3003, representing two aluminium series: 1000 and 3000 series. The former is featured by low price, mature processing technology, low hardness and excellent elongation, while the latter by higher price, stronger hardness, excellent corrosion resistance and good elongation. In terms of integrated properties, 3003 proves to be a better cooker aluminum circle.

Aluminium circles are made into rice cookers first because of the outstanding heat conductivity of aluminium, reaching 237W/mK and second only to copper (401W/mK). Although copper is better in regard of conductivity, it’s not suitable as a cooker material. It rusts easily, which is deadly as a cookware material. It’s softer than iron, and it’s more expensive than aluminium. The conductivity of iron is only 80W/mK, one third of aluminium. The reason why aluminum circle for rice cooker has to compete with iron circle is that some people are spreading the rumor that aluminium cookware is bad to your health. It’s said that long-term use of aluminum cookware will lead to excessive dosage of the metal aluminium and cause several diseases. This point has not been proved scientifically, but it stopped the large scale application of aluminum circle in cookware.

In spite of this, aluminum circle is still a popular material for rice cookers. Aluminum conducts heat uniformly, is easy to form, and is more beautiful. It can be compounded with other metals or alloys. 1050, 1060, 1070 and 1100 aluminum circles are convenient to be formed, but their hardness is weaker than 3003. 3003 has manganese as the alloying metal, and is harder and more corrosion resistant. Whichever alloy it is, a circle is usually processed by a surface treatment. This helps to avoid the possibility of heal issues above.