Hi, hope this is ok for me to ask. I’m a writer, and don’t know anything about blacksmithing. Trying to find out how long it would take to cool molten steel to room temperature? The size would be a pool of it, roughly 1/2 an inch deep, 4 feet in diameter. Nothing being used to help speed the process, simply letting it sit. Hope you guys don’t mind helping me out! Thank you in advanced!