[racepak]

hi guys. i need to weld a mild steel tube to a cast hub, for a bmw e30 coilover kit,
which rod do you recommand me to use? ni55? 300series?

thanks!

[big gear head]

Cast iron or cast steel?

[Arno]

Cast iron or cast steel?

Likely to be the last and quite likely also forged at that.

To get a better idea do the test that Jody does in some of his video's. Clean a spot and light up on an edge of the cast piece until it puddles. Let it cool and use a file to check the hardness of the melted spot.

If it's stil soft then it's low carbon and likely steel. If it has gone glass-hard (aka. the file just skates over it), it's high carbon likely cast-iron.

Bye, Arno.

[Sandow]

I've had little luck with nickel 99, a bit better with bronze. Yet to try this stuff I but I hear good things about it around the track.

http://www.amazon.com/Ez-Weld-Tig-Wire/ ... d+tig+wire

-Sandow