IEC60335-2-9 Low Carbon Steel Vessels for Testing Induction Hotplates 1. Introduction The low carbon steel vessels are designed according to IEC60335-2-9:2002 figure 104, IEC60335-2-6 Fig. 102 , GB4706.14-2008 figure 10 and GB4706.22-2008 figure 102, they are applied to test the induction hotplates. The vessels are made of low carbon steel having a maximum carbon content of 0.08%, and the surface is sprayed with high temperature non-stick coating. It is cylindrical without metallic handles or protrusions. The diameter of the flat area of the base of the vessel shall be at least the diameter of the cooking zone. The base of the vessel shall not be convex. The concavity of the base of the vessel shall not exceed 0.6% of its diameter at the ambient temperature (20±5) ℃. 2. Parameter Diameter of Cooking Zone (mm) Dimension d (mm) e (mm) a (mm) c (mm) ≤110 110 140 2±0.5 <0.006 d ＞110≤145 145 140 2±0.5 <0.006 d ＞145≤180 180 140 2±0.5 <0.006 ...