Welding Tips and Tricks

I had Tig'd up a few things the other day and could hear a " tink - tink - tink sound coming from a cluster weld. Is this a possible sound from hot cracking? Or is it just the heat spreading and cooling? It was at the end of a 3 tube cluster on the last weld in a jig. It did not show any visible signs of cracking. It is now painted white....should I have magnifluxed it ? What do you guys think? Metal was 4130 x .035 wall and ER70-S2...gas lens #8 cup .062 ceriated 18CFH argon. Just had not heard anything before welding tubes and wondered.......

Considering what you're building, yes, I'd suggest some sort of testing, magnaflux or dye penetrant. The only time I hear sounds as a weld cools is when opposing ends are clamped and the clamps "give" as it cools.

It may be nothing, but why gamble? If you don't check it, it'll always be in the back of your mind...

Steve S