In addition, you need to consider the cleanliness, hardenability, and chemistry of the materials. Another aspect that should shape your decision is the surface finish you want. Another thing you need to bear in mind, in this case, is the workload you have. Buying a small heat treatment furnace when you have a lot of materials to be processed might mean having to overload it and this won't be something you will appreciate in the end. When you make a decision bearing in mind the workload you have you will definitely pick a heat treatment furnace that is suitable for whatever you are doing. This means you will not have to overload the furnace and at the same time, the work will not take too long to finish.