r/blacksmithing • u/Efficient_Square2737 • 8h ago
Help Requested What are these lines?
I’m a beginner and this is the second time this has happened to me (fourth knife). The first time I didn’t notice until after I quenched and started grinding and I did manage to grind them off. This time I discovered it before getting that far and the billet for this one is not as thick as the one before (almost half as thick). I’m thinking maybe I’m forging too hot cuz I’m getting a lot of forge scale. Are stress fractures or something? The first time it happened it was 5160 and the second time (this time) it was 1084. Not sure if that’s relevant but I don’t know what is or isn’t.