That is way more inefficient than using tungstensteel boilers thought. The HSS-S steel is a rather large veriety of materials. You can make an even blend of 27 ingot that consists of 5 steel, 5 tungsten, 4 molybdenum, 2 vanadium, 2 chrome, 6 iridium and 2 osmium (as you can see in the tooltip)...