can a arc welder weld cromolly?

S

Snow Patrol

Member
no, arc welders are for industrial use, mild steel mainly.

TIG (Tungsten Inert Gas) is the way to go, It can weld pretty much any metal (including chromoly) to itself as long as you match the filler metal to what youre welding.

Those machines start around $2,000 and can even go up to $5,000 with more options and accessories.
 
P

Pete Pachota

Member
You are acting like 'chromoly' is some magical metal. It's a steel alloy so you can probably weld it using anything. Tig is better I guess though.
 
the_SD_local

the_SD_local

I own SR.
Pete Pachota said:
You are acting like 'chromoly' is some magical metal. It's a steel alloy so you can probably weld it using anything. Tig is better I guess though.
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TIG will produce the strongest weld especially for a scooter application but there is nothing special about chromoly that wouldn't make it weldable by any other process.
 
K

kolbycrouch

Member
the_SD_local said:
Pete Pachota said:
You are acting like 'chromoly' is some magical metal. It's a steel alloy so you can probably weld it using anything. Tig is better I guess though.
Click to expand...
TIG will produce the strongest weld especially for a scooter application but there is nothing special about chromoly that wouldn't make it weldable by any other process.
Click to expand...

exactly, i only have aluminium tig welded because most other welds wont work.
 
D

demo

Member
the_SD_local said:
Pete Pachota said:
You are acting like 'chromoly' is some magical metal. It's a steel alloy so you can probably weld it using anything. Tig is better I guess though.
Click to expand...
TIG will produce the strongest weld especially for a scooter application but there is nothing special about chromoly that wouldn't make it weldable by any other process.
Click to expand...

yeah, the welding will make or break the bars. so yeah arc is not the strongest but it works... TIG is the best by far.... so yeah if u can get it done do it
 
S

Snow Patrol

Member
Pete Pachota said:
You are acting like 'chromoly' is some magical metal. It's a steel alloy so you can probably weld it using anything. Tig is better I guess though.
Click to expand...

no you probably cant.....

its an alloy and it reacts completly different to mild steel, you cannot weld it with arc properly for the following reasons.

1. it is an uncommon metal, and there are no stick (SMAW) electrodes designated for it, it will bond weakly only because it is partially steel. but as i said, the weld will be extremly weak at that,
and will completly defeat the purpose of using chromoly in the first place.

2. arc welding is for mild steel and stainless only, it would be messy and highly uncontrollable for the purposes this chromoly is used for even if there was an electrode for it.

3. since its so expensive, it is only welded in the highest quality equipment and welded ONLY with the cleanest process (TIG)

4. chromoly filler is made for TIG only. the weld loses some of its properties when its heated up to welding temp, and must have the same properties put back into it with the same filler.

FYI, TIG is an arc process, but since everyone calls it (TIG) for a reason, people usually think of (SMAW)... stick welding when "arc" comes up. because its called arc welding.
 
the_SD_local

the_SD_local

I own SR.
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.
 
S

Snow Patrol

Member
the_SD_local said:
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.
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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.
 
Z

zprestoe

Member
wow
i have no bloody idea about any metal except you can weld it

and yet theres guys out their with certifications in it
like JR

didnt even know there where such things at weld certifications
 
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