It is currently Tue Feb 20, 2018 5:25 pm Advanced search

Stick welding stainless nut to A36 angle iron

Stick Welding Tips, Certification tests, machines, projects

Re: Stick welding stainless nut to A36 angle iron

Postby PeteM » Thu Feb 01, 2018 7:04 pm

aland wrote:I think this has taught me mostly that it could be good to have some inexpensive exhaust system to pull the fumes away, or in the worst case I will just use a small fan to blow the fumes away from me.

Alan



Yeah, ventilation is a very good idea regardless of what you're welding. Aside from the chromium, there are other additives like manganese that can cause some serious problems down the road. Even using a regular box fan to draw the smoke/fumes out will help.

ps. Apologies for my abrasive introduction. That was a bad reaction and unnecessary. You don't have to worry about that happening again.
PeteM
Ace
 
Posts: 325
Joined: Sat Dec 03, 2016 11:28 am
Location: Pittsburgh

Re: Stick welding stainless nut to A36 angle iron

Postby aland » Thu Feb 01, 2018 7:37 pm

PeteM wrote:Yeah, ventilation is a very good idea regardless of what you're welding. Aside from the chromium, there are other additives like manganese that can cause some serious problems down the road. Even using a regular box fan to draw the smoke/fumes out will help.


Indeed, I will be fixing that problem in the future, and using a box fan in the meantime.

PeteM wrote:ps. Apologies for my abrasive introduction. That was a bad reaction and unnecessary. You don't have to worry about that happening again.


No worries, I have thick skin. I'm certain you have a lot more welding experience than me, and I will be the first to admit, the project that has sparked my interest in welding is a critical one. I do plan to take it on, but not until I feel comfortable with it. I purchased a piece of plate to use, but can always opt to have someone weld it for me should I not feel comfortable. In the meantime I'm doing some smaller projects that are not as critical/dangerous, some of them tig, but I've been practicing my stick and feeling a lot more comfortable with 7018 and 6011, just not comfortable enough to take on the hitch just yet.

This is a very non-critical application, a nut to hold a caster on the bottom of a piece of angle under a simple welding table. Just trying to understand the metals and fumes...about 15 years ago I started blacksmithing, and used to hang out on AnvilFire, where Jim "Paw-Paw" Wilson, a great blacksmith, used to help folks, publish articles, and in general promoted the art of blacksmithing...I only knew him for a couple years...but he was taken victim of fume fever...a sad day indeed when he passed, mainly as he knew better...$#!T happens to the best of us...I would encourage anyone who is not very familiar with fume fever to read this, it does talk about welding hazards on that page, so very pertinent to welding.

R.I.P. Paw-Paw, you will be long missed... :(

http://www.anvilfire.com/iForge/tutor.p ... fety3/demo

These little nuts are nothing like that. Just good to be aware, don't breath the crap, it's not good for you. I'm certain I could weld this in my shop and be done with it and go on with life...but that doesn't mean it's right. I *WILL* be getting better fume extraction, no question.

Alan
aland
Guide
 
Posts: 155
Joined: Thu Dec 28, 2017 11:10 pm

Re: Stick welding stainless nut to A36 angle iron

Postby Poland308 » Thu Feb 01, 2018 8:34 pm

Hex chrome vapors do require more than just a fan to get rid of. The fab shop at the place I work has to use special monitoring equipmen to monitor levels. Even with the shop doors open and fans running the levels can be high. You need special point of use vac systems to capture the vapor plume off the weld. If your concerned about such things.

309 is formulated specifically for low carbon to SS joints. It will maintain the corrosion resistance while keeping your joint from becoming brittle. For your application it may not be necessary, but it is the correct way. 312 is expensive but not uncommon. However it is formulated for other purposes. Simply reading the info from the manufacturer web site will no doubt remove personal opinions and empower you with facts.
http://weldingwire.com/Images/Interior/ ... ry/312.pdf
http://weldingwire.com/Images/Interior/ ... ry/312.pdf
I have more questions than answers

Josh
Poland308
Weldmonger
 
Posts: 2441
Joined: Thu Sep 10, 2015 8:45 pm
Location: Iowa

Re: Stick welding stainless nut to A36 angle iron

Postby aland » Thu Feb 01, 2018 8:49 pm

Lightning wrote:P.S. That SuperMissileWeld is some exotic, expensive and effective stuff. I sure as he¡¡ wouldn't waste it for your little "welded nut" project.


Almost missed your post, but I won't be using it for this...I am going to use mild steel after the plating is removed.

I honestly don't know what I will use it for, since stick welding stainless is not going to be something I do regularly, I was actually thinking about using the stainless to avoid the plate fumes...given there is no gain, mild steel is the way to go. If I understood my LWS correctly, even when tig welding you need to be aware of indifferent metals as they have different heat temps...(i.e., stainless and mild have different melting points). That said, I do use tool steels occasionally, but would probably use tig for that in the future. You still need to understand differences as fusion will take place at different temps, so starting on the stainless side of the weld with tig and moving to the A36 might be desirable, I'm not sure...just talking out the side of my arse...but I can see that would be an issue for tig as well.

Poland308 wrote:http://weldingwire.com/Images/Interior/documentlibrary/312.pdf


Yes, thank you for that link:

"312 is a good choice for welding carbon steels to stainless, tool steels and other difficult to weld steels."

Would probably work but not perfect for this application as A36 is a low carbon steel. Stainless to O1 would probably be a better match for 312 I would think.

That may be useful in the future. I do work with tool steels quite often, but try to pick ones that will weld, like 8620 when welding is a possibility. I have made some stuff like axles for bearings to ride on that would be welded to mild steel, and in that case will use 1018 as it welds. In the past I would take the axles and mild steel to a local fab shop and get them to weld it for me, but trying to learn that so I don't need to job that type of stuff out anymore, since I have a small welder now. ;) Even so, I think tig would suit welding dissimilar metals more than stick.

Alan
aland
Guide
 
Posts: 155
Joined: Thu Dec 28, 2017 11:10 pm

Re: Stick welding stainless nut to A36 angle iron

Postby homeboy » Sat Feb 03, 2018 11:03 pm

When welding on nuts for whatever purpose I only use what I think they call flair nuts. The ones with the built in washer flange on the bottom. Even a 1/4in has enough of a flange to get a secure weld without chancing blowing into the threads. Screw a bolt just thru the nut to protect the treads.
homeboy
Ace
 
Posts: 219
Joined: Mon Dec 19, 2016 11:52 pm

Re: Stick welding stainless nut to A36 angle iron

Postby cj737 » Sat Feb 03, 2018 11:48 pm

homeboy wrote:When welding on nuts for whatever purpose I only use what I think they call flair nuts. The ones with the built in washer flange on the bottom. Even a 1/4in has enough of a flange to get a secure weld without chancing blowing into the threads. Screw a bolt just thru the nut to protect the treads.

If I may, never screw a stainless bolt into a stainless nut and weld the nut. The heat will fuse the bolt to the nut permanently, even if you weld the flange. If you coat the bolt with AntiSieze you stand a chance to get it out, but use an oxide or zinc bolt for better results.
cj737
Weldmonger
 
Posts: 815
Joined: Thu Sep 29, 2016 8:59 am

Re: Stick welding stainless nut to A36 angle iron

Postby homeboy » Sun Feb 04, 2018 12:13 am

Actually all I ever use is mild steel. I never worked with stainless other than some plasma cutting. From following the threads
cj737 wrote:
homeboy wrote:When welding on nuts for whatever purpose I only use what I think they call flair nuts. The ones with the built in washer flange on the bottom. Even a 1/4in has enough of a flange to get a secure weld without chancing blowing into the threads. Screw a bolt just thru the nut to protect the treads.

If I may, never screw a stainless bolt into a stainless nut and weld the nut. The heat will fuse the bolt to the nut permanently, even if you weld the flange. If you coat the bolt with AntiSieze you stand a chance to get it out, but use an oxide or zinc bolt for better results.
Actually all I ever work with is mild steel. I do know from following the threads that if I ever decide to try stainless that I got a lot of " learnin" to do. Thanks for the advice. :D
homeboy
Ace
 
Posts: 219
Joined: Mon Dec 19, 2016 11:52 pm

Re: Stick welding stainless nut to A36 angle iron

Postby aland » Sun Feb 04, 2018 3:14 am

cj737 wrote:
homeboy wrote:If I may, never screw a stainless bolt into a stainless nut and weld the nut. The heat will fuse the bolt to the nut permanently, even if you weld the flange. If you coat the bolt with AntiSieze you stand a chance to get it out, but use an oxide or zinc bolt for better results.


cj,

I don't work with stainless too much either, I was only thinking that I would be ok welding stainless, but as it turns out the fumes don't seem any better.

The casters don't have stainless bolts, they have zinc I'm almost certain.

I took a fan in the garage and will just use it to blow the fumes, grind the chrome off and weld these nuts on there. It's not a big deal. I welded the cross bars with the holes on earlier, but got summoned away for dinner.

I could just jb-weld these nuts on also, they only need to hold the caster in. Am I allowed to mention jb-weld on a welding forum? :roll:

Alan
aland
Guide
 
Posts: 155
Joined: Thu Dec 28, 2017 11:10 pm

Re: Stick welding stainless nut to A36 angle iron

Postby homeboy » Sun Feb 04, 2018 9:41 am

JB Weld -- AAARRRRGGGGGHHHHH !!!!
homeboy
Ace
 
Posts: 219
Joined: Mon Dec 19, 2016 11:52 pm

Re: Stick welding stainless nut to A36 angle iron

Postby cj737 » Sun Feb 04, 2018 9:46 am

homeboy wrote:Actually all I ever use is mild steel. I never worked with stainless other than some plasma cutting. From following the threads
cj737 wrote:
homeboy wrote:When welding on nuts for whatever purpose I only use what I think they call flair nuts. The ones with the built in washer flange on the bottom. Even a 1/4in has enough of a flange to get a secure weld without chancing blowing into the threads. Screw a bolt just thru the nut to protect the treads.

If I may, never screw a stainless bolt into a stainless nut and weld the nut. The heat will fuse the bolt to the nut permanently, even if you weld the flange. If you coat the bolt with AntiSieze you stand a chance to get it out, but use an oxide or zinc bolt for better results.
Actually all I ever work with is mild steel. I do know from following the threads that if I ever decide to try stainless that I got a lot of " learnin" to do. Thanks for the advice. :D

The best “learnin’“ I’ve ever received in welding and fabricating left the worst scars ;) Just trying to help someone avoid costly medical bills... :lol:
cj737
Weldmonger
 
Posts: 815
Joined: Thu Sep 29, 2016 8:59 am

PreviousNext

Return to Stick Welding/Arc Welding - Shielded Metal Arc Welding