Craftsman’s Cribsheet #99
Carbon may be the most important determinant of a steel’s properties. But without iron there is no steel. No humans, either. Iron is the decay product of Nickel 56 which is the last element produced by nuclear fusion as a star collapses. So, what else should be known about this essential to human life, essential to the precision machining industry, forged in the heart of dying stars chemical element?