can a arc welder weld cromolly?

[the_SD_local]

lol... we aren't building jet fighters. All the things you mentioned are true but the chances of them making any real difference for our application are next to nothing. Steel is steel is steel is steel. It all melts together. If the joint is weaker then make the weld bigger. You can bond basically any metal that will melt with a DC- current. You can weld copper to steel if you want to although there would be no real point for that. I used to use bronze filler all the time on steel and stainless steel parts if they were cosmetic and needed patches.

Yes, there is a science to welding but 99% of the time most of the little details don't make any noticeable difference.

ahh.... i dont want to argue, but i could really show you a few things in metallurgy andrew.

for one, It can and will make a difference.. if youre going to do something why not do it as best as you can.

I do know what im talking about, and i respect that you know alot too.

Im not looking for arguements, just trying to help someone make the best parts they can.

I have 3 welding certifications and one of them happens to be metallurgy, so i had to learn what certain metals will do and why.

And i do know that if youre welding chromoly you want to do it right because of the cost and strength of the metal.

It is a very strong and rare metal (magic as pete would say haha) yes, and if you look into every detail about it and use the right process you will have a long lasting pair of bars.

Id love to talk with anyone about this stuff, and i love to help with it and thats all i intended.

K.

 

[Eric Magray]

welding 4130 using 4130 filler is asking for trouble if you dont know what youre doing. using 4130 filler requires special attention to pre- and postheating. if at any point you arent careful about what youre doing you wont just see warping, youll get CRACKS throughout the length of the bead. even if you think youre being careful theres a good chance you will get crater cracks. i could go on for pages about welding 4130 but i dont have time right now.

just tig weld 4130 with er70s-2 and youll be set. plenty strong for scooters and the process is simple enough to do at home.

 

[fly]

shit, i plan on buying an arc/stick welder. o well no 4130 for me. but that doesn't both me 2 much

 

[Snow Patrol]

My old 4130 bars were welded with an ARC welder..

It most definatly wasnt stick then, or your bars would have to be at least 1/4" to 3/8" thick to even maintain the heat and not melt through.

 

[conordavidson]

Yea eric is right. All the bars I've had welded were 4130 with stainless filler. I believe er70s-2 is stainless, correct?