GB21456-2008 Test Vessels for household induction cookers The vessels are made according to the requirements of GB21456-2008 standard. It’s mainly used to exam the energy efficiency and energy efficiency grades for house hold induction cookers. Parameters: 1. The pots are made of Q235, having a maximum carbon content of 0.08% 2. Thickness of the cover is 1mm, body thickness “t” of the vessel please check the figures 3. The base of the vessel shall not be convex. The concavity of be base of the vessel shall not exceed 0.006d. 4. Pots body and the cover surface should be smoothly, and sand rust surface treatment.