Steam engine refractory in Everything Else Posted February 5 I'm not sure yet of the amount of thermocycling involved. When we are operational it will run every weekend, so will probably maintain temp for steam pressure over the weekend then cool down during the week. It definitely does get hot enough to create clinker, however the quality of the coal we use reduces how much I've encountered. This engine hasn't run since about '67 and this is the first engine that I have been a part of working on so I am learning as I go. I am unsure of the gauge of the ashpan currently. I'm in contact with individuals who run locomotives, but not with anyone that has done the conversion before so it is a bit of an experiment for us determining the extent of the changes that need to be made. When we decided to roll with coal we had a committed free source of coal, however with the political winds being what they are, we have access to coal considering the area with live in but the cost has definitely gone up considerably above "free". Fire brick usage is definitely doable I'm just glad to have this discussion with folks who are familiar with the products.