Welding stainless

[DANS40X]

Would love to see you mag something that's austenitic, laughing.

Dye will show you a lot more than a crack, xray on a gun part wouldn't be cost effective. While we are at it lets get some eddy current going on our guns for inspection. Could do the whole thing in no time.

World of difference between an InspectOR & a WeldOR!!

 

[SuperCub]

We could be friends.

It's a small world in this business. We may have crossed paths. Just went past 20yrs. with Acuren.

Haven't spent a lot of time in Alta, other than a 3 monther at Syncrude in 2005. The Irving refinery here in SJ has kept me busy along with the local mills, nuke plant and fab shops.

 

[bearhunter]

Dye penetrate is used for crack detection...ONLY & is easily fooled w/a thin application of lacquer that is not mechanically removed prior to dye penetrate.

Magnetic Particle Inspection or X-Ray is used for structural integrity.

ex- Dye Penetrant Insp
A visible crack in a hyd line "B" nut w/an application of clear lacquer/enamel will NOT be visible w/ dye penetrate, since the NDI (Non Destructive Inspection) does not allow acids/harsh chemical use to prep surfaces for development.




You need a better understanding of the TIG weld process than you've learned from Wiki....since you haven't a CLUE.

You're right about TIG welding I don't know and just thought the Wiki post would help. You folks that have experience in such things, tend to get carried away with trying to dazzle people with terms, they have no clue about what you're saying.

You both sound very knowledgeable on the subject and I wouldn't attempt to try to show I do. The post was merely to give perspective to some of the words being used in your discussion, hopefully giving laymen a chance to understand what you're getting at.

 

[trevj]

You're right about TIG welding I don't know and just thought the Wiki post would help. You folks that have experience in such things, tend to get carried away with trying to dazzle people with terms, they have no clue about what you're saying.

You both sound very knowledgeable on the subject and I wouldn't attempt to try to show I do. The post was merely to give perspective to some of the words being used in your discussion, hopefully giving laymen a chance to understand what you're getting at.

It didn't help.
To be honest, as you admit to not knowing about the stuff, why bother to try to 'explain' it by copying and pasting someone else's very badly (not that you would know) description of the very basics of welding with TIG?

If you already know you are blind, why try to lead the other blind guys around?

 

[DANS40X]

You're right about TIG welding I don't know and just thought the Wiki post would help. You folks that have experience in such things, tend to get carried away with trying to dazzle people with terms, they have no clue about what you're saying.

You both sound very knowledgeable on the subject and I wouldn't attempt to try to show I do. The post was merely to give perspective to some of the words being used in your discussion, hopefully giving laymen a chance to understand what you're getting at.

FYI-
Heli-Arc as it's discovery in the 50's-
Is TIG using the inert gas Helium as the shielding gas.
Helium gives a pinkish hue to the UV light,but requires 3X the gas flow(60cfm-20cfm).
Argon,an inert gas is used 99% of the time as the shielding gas.
Gas mixes are sometimes called for depending on parent/base material.
Nitrogen,an inert gas is NOT used in the TIG process
But a mixed C25 (25% co2) w/ 75% Argon for less spatter/flatter/wetter bead is preferred in the MIG(wire feed/short arc) welding process.

TIG is NOT a short arc process like SMAW(stick) or MIG(metalic inert gas),so there is not sparks or spatter w/ TIG.

TIG w/o an inert shielding gas is Chernobyl after contactor/lift arc activation.

Purge is used on the back/opposite side of parent material in the TIG process to keep the atmosphere out of the process.

 

[bearhunter]

Thanx very much for this. I honestly appreciate it and it's something I can do more indepth research on.

 

[trevj]

FYI-
Heli-Arc as it's discovery in the 50's-
Is TIG using the inert gas Helium as the shielding gas.
Helium gives a pinkish hue to the UV light,but requires 3X the gas flow(60cfm-20cfm).
Argon,an inert gas is used 99% of the time as the shielding gas.
Gas mixes are sometimes called for depending on parent/base material.
Nitrogen,an inert gas is NOT used in the TIG process,but is mixed C25 (25% co2) w/ argon for less spatter in the MIG(wire feed/short arc) welding process.

TIG is NOT a short arc process like SMAW(stick) or MIG(metalic inert gas),so there is not sparks or spatter w/ TIG.

TIG w/o an inert shielding gas is Chernobyl after contactor/lift arc activation.

Purge is used on the back/opposite side of parent material in the TIG process to keep the atmosphere out of the process.

Huh?

Nitrogen =/= CO2, and C25 IS Carbon Dioxide and Argon, but never heard of Nitrogen in it.

 

[BigRobb]

This thread is funny.
One thing actual welders never do in real life is hang out and discuss the theory behind the different weld processes or composition of this gas or whatever. They turn the machine on and get to it.
Like most trades, you can pretty much throw your books from school in the trash and hope you get the honour of working with guys that know how to get it done. Most of the smartest guys I’ve learnt the most from didn’t graduate high school…
On a side note, welding a slide like that is not practical and won’t last.
Second note. The finishing on that bolt handle is 10 times more important and difficult than the welding.

 

[trevj]

This thread is funny.
One thing actual welders never do in real life is hang out and discuss the theory behind the different weld processes or composition of this gas or whatever. They turn the machine on and get to it.
Like most trades, you can pretty much throw your books from school in the trash and hope you get the honour of working with guys that know how to get it done. Most of the smartest guys I’ve learnt the most from didn’t graduate high school…
On a side note, welding a slide like that is not practical and won’t last.
Second note. The finishing on that bolt handle is 10 times more important and difficult than the welding.

I did a lot of buckshi welding while I was in the Military, ranging from fixing fishing reels to welding together a mount for an f-18 gate guard. Never had a ticket.

My wife was a NDT tech in the Forces, Level 2 Rad, UT, Eddy Current, MPI, and a bunch of others, I only got so far as getting qualified MPI.

As far as finishing goes, the 3M whizz wheels sure save a lot of time! They are like a rubberized version of Scotchbrite, meant for deburring aluminum parts supposedly, and frikken expensive, but what a sweet finish!

A real world test of some of my welds...

As some minor back story, the sawed off little crunt in the cherry picker (who, in the end, was determined to have carried the responsibility) decided he was smarter than the engineers that designed the mount, so he put the small crane at the back, where it was carrying a huge load, and when he tried to use the aircraft lifting points, rated at 10,000 pounds per, in conjunction with a chain fall hoist, to tilt the aircraft over to 45 degrees, the mounts blew apart.They figure he had around 30,000 pounds worth of the 40K weight of the entire assembly, hanging on those two mounts.

FWIW, the aprox center of gravity of the whole assembly as lifted, was just slightly ahead of the highest cross member of the mount, just behind the jet engine nozzles. Had he put the big crane on the cross member, instead of way the hell back like he did the small crane, it just might have worked.

Would have been better for all concerned, if he had been under it. The internal mount I was a part of building, held up just fine.

After the drop, anyone that had any engineering connections decided that then was a good time to have their say, so they took out work out of the insides and had it done over by certified welders.

I spent a year of my life working on that mount.

 

[Rick]

This thread is funny.
On a side note, welding a slide like that is not practical and won’t last.

On a side note (not being a welder mind you), a funny thing about shooters - especially the ones willing to pay that kind of money to have a specialized welder fix a cracked receiver, cylinder, whatever on a prized rifle, shotgun or pistola... they talk to each other. A lot.

If those welds cracked when those rifles and handguns were put back into use by whoever paid a good chunk of money to have that gun fixed, the entire online shooting world would hear about it and the specialized business who did the weld would be out of business. And there would probably be numerous slip and fall lawyers pounding on their door with papers in hand, especially if the gun came apart in the owner's face or worse, their kids' face. You know, like the Remington death by lawyer treatment.

Can anyone see any other outcome to that scenario if those welds failed once the gun was put back into use? Especially in our neighbors to the south's country? Where you get awarded millions of dollars for slipping and falling in a store?

This is only my opinion, of course, because I'm not one of the ones who paid that much coin to put a firearm back into service so I have no direct knowledge of how many blow up.

 

[Rick]

Jet fighter is dropped by crane. CFB Cold Lake...

I spent a year of my life working on that mount.

Assorted jets, airplanes, and helicopters dropped me many times during my 30 years in the military. The landings were often better described as arrivals. Especially when the pilots missed the DZ a bit and dropped us in trees, roof tops, etc.

You have no idea how big of a smile it put on my face to see an airplane get the same treatment and the same arrival for once. Thank you... sharing the hell out of that video right now with a bunch of old fellow jumpers.

 

[BigRobb]

On a side note (not being a welder mind you), a funny thing about shooters - especially the ones willing to pay that kind of money to have a specialized welder fix a cracked receiver, cylinder, whatever on a prized rifle, shotgun or pistola... they talk to each other. A lot.

If those welds cracked when those rifles and handguns were put back into use by whoever paid a good chunk of money to have that gun fixed, the entire online shooting world would hear about it and the specialized business who did the weld would be out of business. And there would probably be numerous slip and fall lawyers pounding on their door with papers in hand, especially if the gun came apart in the owner's face or worse, their kids' face. You know, like the Remington death by lawyer treatment.

Can anyone see any other outcome to that scenario if those welds failed once the gun was put back into use? Especially in our neighbors to the south's country? Where you get awarded millions of dollars for slipping and falling in a store?

This is only my opinion, of course, because I'm not one of the ones who paid that much coin to put a firearm back into service so I have no direct knowledge of how many blow up.

I’ve fixed more cracks in multiple types of metal than I care to say. There is NEVER a time when a weld repair without adding more material or re engineering the piece has been as strong as the original. Even if the weld itself is stronger, without removing the stress engineered into the part, it will fail next to it. That’s even assuming a perfect weld and complete stress relief. Unless there was a flaw in the material, but if it’s a know issue, then it’s a design flaw and will continue to fail until the design is improved.

 

[trevj]

Assorted jets, airplanes, and helicopters dropped me many times during my 30 years in the military. The landings were often better described as arrivals. Especially when the pilots missed the DZ a bit and dropped us in trees, roof tops, etc.

You have no idea how big of a smile it put on my face to see an airplane get the same treatment and the same arrival for once. Thank you... sharing the hell out of that video right now with a bunch of old fellow jumpers.

Welcome!

I knew a fair few Helo Pilots whose navigation was directly affected by how many insults about the Air Force they heard during their lift. If folks were polite, or at least, kept it to themselves, like as not, they got dropped in their planned LZ, otherwise the pilot got 'lost' or otherwise 'screwed up', and the freight in back found itself with a considerable run to make their place and time as per the "Plan". LOL!

 

[trevj]

I’ve fixed more cracks in multiple types of metal than I care to say. There is NEVER a time when a weld repair without adding more material or re engineering the piece has been as strong as the original. Even if the weld itself is stronger, without removing the stress engineered into the part, it will fail next to it. That’s even assuming a perfect weld and complete stress relief. Unless there was a flaw in the material, but if it’s a know issue, then it’s a design flaw and will continue to fail until the design is improved.

Yeah, seen a fair few cracks through the Heat Affected Zone on parts that were welded without any post heat treat. Couple days ago, I hit a bump driving tractor, and the seat frame fell apart around a bunch of the older welds on it.

I chose the 'Added Material' approach, welded the cracks then added a bunch of angle to the works to (hopefully) not have to do that job again.

The guys that weld chrome moly tubing for light aircraft frames gravitate towards Oxy-Acet torches for the heat they throw in to the entire area, when TIG welding, they come back after and heat the entire weld area so as to not have the problems of a concentrated HAZ.

 

[DANS40X]

trevj,
fixed the confusion in previous post-
google C25 mixed gases

FYI-
75% Argon & 25% CO2
MIG process

I prefer purged TIG for CrMo tubing.

Keep the atmosphere at bay & one's welds will outlast the weldor(operator) not welder(power supply).

 

[trevj]

trevj,
fixed the confusion in previous post-
google C25 mixed gases

FYI-
75% Argon & 25% CO2
MIG process

I prefer purged TIG for CrMo tubing.

Keep the atmosphere at bay & one's welds will outlast the weldor(operator) not welder(power supply).

Yeah, that makes sense now.

I was torn between a bottle of C25 and straight CO2, for my crappy little MIG welding machine. Bought the C25 bottle, and may buy a CO2 bottle later. Been told a straight CO2 weld is dirtier than a C25 one, but that a bottle of CO2 is cheap and lasts a very long time. Figured that either HAD to be nicer than the flux core I was burning!

Bought straight Argon for my TIG use.

I doubt very much that I will ever get a ticket, but for around the farm, I think I have the skills and knowledge to at least know when I am over my head.

 

[DANS40X]

Yeah, that makes sense now.

I was torn between a bottle of C25 and straight CO2, for my crappy little MIG welding machine. Bought the C25 bottle, and may buy a CO2 bottle later. Been told a straight CO2 weld is dirtier than a C25 one, but that a bottle of CO2 is cheap and lasts a very long time. Figured that either HAD to be nicer than the flux core I was burning!

Bought straight Argon for my TIG use.

I doubt very much that I will ever get a ticket, but for around the farm, I think I have the skills and knowledge to at least know when I am over my head.

Inert Nitrogen,Helium,Argon use the CGA 580 regulator male nipple & male nut.
O2 is opposite w/ male nipple & female "B" nut.
Hydrogen/flamables will have male nipple w/LH male threaded nut.

Water cooled torch connectors are male nipples w/ LH male threaded nut,inert gas fittings being opposite RH thread.

CO2 will require a completely separate regulator/hose(longer) set up & requires a Teflon washer between regulator nipple & tank valve.

keep using the C25-83CF bottles or 150CF bottles are easier to transport than 160CF bottles.

A Dewars will last.....
1 gallon of cryogenics boils off to 860 gallons of gaseous.

 

[trevj]

Inert Nitrogen,Helium,Argon use the CGA 580 regulator male nipple & male nut.
O2 is opposite w/ male nipple & female "B" nut.
Hydrogen/flamables will have male nipple w/LH male threaded nut.

Water cooled torch connectors are male nipples w/ LH male threaded nut,inert gas fittings being opposite RH thread.

CO2 will require a completely separate regulator/hose(longer) set up & requires a Teflon washer between regulator nipple & tank valve.

keep using the C25-83CF bottles or 150CF bottles are easier to transport than 160CF bottles.

A Dewars will last.....
1 gallon of cryogenics boils off to 860 gallons of gaseous.

Used to have no end of the problem with the regulators at work, one of the so called welders, was firmly in the belief that teflon tape was required for every gas fitting, including the bottle...Ugh. Done some dicking about with commercial bottle CO2 while mucking about with air guns, converting them to run on bulk tanks, and such.

Got a water cooler and a WP-20 torch for my plug in welder (Miller 250HF) and an air cooled WP-9 torch and starter box with my diesel (Acklands labeled Miller 225D), been through the various fittings.... Also have my crappy MIG (a beat to hells Lincoln 110v unit) as well as a Linc LN25 suitcase rig that I can run off either of my big machines. Other than perhaps a purchase of a solid state welding machine at some point in the future, I figure I am pretty well equipped...

Courtesy of supply chain issues, the largest bottles available were the 20cu/ft baby size bottles, so that's what I am stuck with for now. Was not interested in getting in to rental bottles, as our needs vary so much. May go long times without needing welding at all, then all hell breaks loose (Or trev hits a post with the baler...)

I actually have a dewar bottle, but mine was for LN2, not pressurized. Not gonna help me here!

Recently ran in to a second style of Acet valve, a friends boy was looking for a reg to fit his mini bottle, with a flat face connection. I had the same as he did, the regular male threaded one.

Anyways, I think we have cranked this thread so far off into the weeds as to maybe deserve a trip to OT with it... LOL!

I hope Chuck is happy with the weld job he gets!