that looks like chrome plating, which should be removed for safety. Brazing a fork crown properly requires a lot of heat for a long time.


The failed joint is clear evidence of malpractice. It was built by someone who doesn't know what they are doing. Whoever let them build it is likely allowing other novice builders to endanger other riders. There simply is no way of having such a failure on a properly brazed crown, it simply cannot happen. And furthermore, if they had gotten anywhere close to getting penetration, the failure wouldn't have happened either.

On further reflection, I see what happened. They got penetration under the headset seat and stopped there. That's why you have to pull braze material through the crown until it comes out the other side.