welding stainless to mild steel

Post by **one_waz** » Wed Oct 14, 2009 7:19 pm

Will i be right to weld 1inch solid stainless to mild steel plate with my mig using normal wire/argosheild?

Post by **DR Frankenstine** » Wed Oct 14, 2009 8:11 pm

Post by **one_waz** » Wed Oct 14, 2009 11:09 pm

cheers mate

Post by **FRLS4B** » Thu Oct 15, 2009 5:49 am

if u dont mind the rust

Post by **DR Frankenstine** » Thu Oct 15, 2009 4:25 pm

FRLS4B wrote:if u dont mind the rust

If he minded the rust he wouldnt be using mild steel

Post by **FRLS4B** » Thu Oct 15, 2009 10:20 pm

The best way to successfully weld SS to MS or even Hardened Tool steel to MS is to use Magna 303 welding rod mfg by Magna Industrial, Australia. It has been tried and tested and is the only successful way to weld different steels and the weld has a tensile strength of 1,20000 psi, but these rods are expensive and suitable primarily for maintanence or repair welding

Post by **one_waz** » Fri Oct 16, 2009 1:56 pm

thanks for the replies

Post by **ajsr** » Fri Oct 16, 2009 3:33 pm

yes they weld togther fine

Post by **awill4x4** » Fri Oct 16, 2009 7:11 pm

FRLS4B wrote:The best way to successfully weld SS to MS or even Hardened Tool steel to MS is to use Magna 303 welding rod mfg by Magna Industrial, Australia. It has been tried and tested and is the only successful way to weld different steels and the weld has a tensile strength of 1,20000 psi, but these rods are expensive and suitable primarily for maintanence or repair welding

Yet another case of "a little knowledge is a dangerous thing".
Regards Andrew.

Post by **FRLS4B** » Fri Oct 16, 2009 7:18 pm

its like saying sure u can weld your rocksliders onto your chassis, 'she'l be right mate!' not understanding the physics and properties of steel can be near fatal depending on where the weld is and what its doing, thats why engineering exists

Post by **fester2au** » Fri Oct 16, 2009 8:33 pm

We used to weld mild steel to stainless or mild to mild etc whenever we need to with stainless filler rod and TIg cause we had no real need to buy full packs of filler rod for infrequent use. always welded fine and never any strength issues. In fact I often find that the stainless filler rod is neater to use than the "correct" stuff which we finally bought cause we had a big non stainless and could finally warrant it

Post by **FRLS4B** » Fri Oct 16, 2009 8:47 pm

alot of people use stainless filler rod, including myself on mild steel applications as it greatly reduces perosity, i guess i see things more from an engineering perspective, as it gets very nitty gritty when drawing on CAD software and there are 20 white collar know it alls wanting perfection.

Post by **fester2au** » Fri Oct 16, 2009 9:21 pm

True but I doubt any of those 20 are members of outers and if they were it woudlbe unlikely they would be asking that question here.

Post by **one_waz** » Fri Oct 16, 2009 9:58 pm

so am i better off using stainless filler and TIG, or just regular MIG/argosheild? i have both

Post by **ajsr** » Fri Oct 16, 2009 10:41 pm

standard mild wire and your argoshield will be fine
cheers andrew

Post by **DR Frankenstine** » Fri Oct 16, 2009 11:25 pm

The answer was easy

YES!!!!!

Post by **awill4x4** » Sat Oct 17, 2009 9:26 am

Welding stainless to mild steel isn't exactly rocket science, we're not talking about some of the exotic metals here. If you want to be pedantic then use grades 309L or 309Mo Stainless rods/filler wire this is an accepted standard worldwide.
If all you've got is mild steel Mig then use that it will be fine it just won't be the "perfect" solution but it will do the job.
Regards Andrew.

Post by **one_waz** » Mon Oct 19, 2009 2:09 pm

ok thanks, will use TIG and ER 316 wire,

Post by **v8lux** » Mon Oct 19, 2009 8:55 pm

wouldnt dream of using mild steel wire in a mig to weld stainless to mild steel

,if you dont believe me try it ,then put what you have welded in a vise and give it a good whack with a hammer and see what happens .
there is absolutely no strength using this method and dont let anyone tell ya otherwise. People get hurt due to miss -information if you are not sure ask a qualified expert (theres plenty of people claiming to be experts on here but dont believe everything you read just because they have a picture of a welder on their profile)
Cheers Brad

Post by **FRLS4B** » Mon Oct 19, 2009 9:14 pm

i understand what you guys are saying, theres an absolutely right way to do things, then theres the it will be good enough for the application way to do things. Too many people think like this, and thats why vehicles need to be engineered and certified because anyone can pull their 20 year old arc welder out and re adjust body mount points on their vehicle, who pays the price in an accident when an innocent family dies?

anyway im going off topic, when welding mild steel to stainless, your introducing lead corrosion to it, all the chromium that is in the stainless will be useless around the weld joint as its now been impregnated by the elements of the mild steel, i dont claim to be an expert im only a 4th year sheety

Post by **awill4x4** » Mon Oct 19, 2009 10:46 pm

v8lux wrote:wouldnt dream of using mild steel wire in a mig to weld stainless to mild steel ,if you dont believe me try it ,then put what you have welded in a vise and give it a good whack with a hammer and see what happens .
there is absolutely no strength using this method and dont let anyone tell ya otherwise. People get hurt due to miss -information if you are not sure ask a qualified expert (theres plenty of people claiming to be experts on here but dont believe everything you read just because they have a picture of a welder on their profile)
Cheers Brad

Ok Brad. What's your claim to Boilermaking fame? If you'd like to turn it into a pi$$ing contest I'm up for it.
I've got DOL tickets 1,2,4,7 (stainless endorsed) and 10 (welding inspector/supervisor) and Boilermaker proficiency certificate since 1978.
Regards Andrew.

Post by **mickbeny** » Tue Oct 20, 2009 7:08 am

awill4x4 wrote:Welding stainless to mild steel isn't exactly rocket science, we're not talking about some of the exotic metals here. If you want to be pedantic then use grades 309L or 309Mo Stainless rods/filler wire this is an accepted standard worldwide.
If all you've got is mild steel Mig then use that it will be fine it just won't be the "perfect" solution but it will do the job.
Regards Andrew.

Hi all...Spot on,Thats how we have done it over the last 25yrs doing jobs for Esso,BP,Woodside petrolium ect ect.

Post by **ajsr** » Tue Oct 20, 2009 2:31 pm

mickbeny wrote:
awill4x4 wrote:Welding stainless to mild steel isn't exactly rocket science, we're not talking about some of the exotic metals here. If you want to be pedantic then use grades 309L or 309Mo Stainless rods/filler wire this is an accepted standard worldwide.
If all you've got is mild steel Mig then use that it will be fine it just won't be the "perfect" solution but it will do the job.
Regards Andrew.
Hi all...Spot on,Thats how we have done it over the last 25yrs doing jobs for Esso,BP,Woodside petrolium ect ect.

yep x2 all the above methods will work just fine.

Post by **eliteforce32** » Tue Oct 20, 2009 2:57 pm

I have to agree as well

... coming from petro/high pressure background.

just need V8Patrol to get on board and it will be a complete .....piss fest

Post by **v8lux** » Tue Oct 20, 2009 6:26 pm

did i miss something here

what you are all saying is that it is quite acceptable to weld stainless steel to mild steel using a mig with mild steel wire

and on top of that no one has even asked the application for which they are being welded.

Yes i agree the tig methods discussed would be fine , however APPLICATION is the key word .In an ideal world for anything that requires structural or mecanical strength, you would try to eliminate the need to weld the two unless absolutely necessary (design review), even then a qualified welding procedure should be used.I doubt very much that there is a qualified welding procedure for welding stainless to mild using a mig with mild steel wire if there is one id love to see it

Id also love to see the macros and the radiograph or even the charpy results.

Im not here for a pi$$ing contest i dont need to post all my quals and tell you all how good iam so i can feel better about myself.
Im just voicing my opinion based upon technical knowlege ,experience, education and Trade experience also some good old fashioned common boilermaking knowledge
Cheers Brad

(DOL tickets were superceeded in 1998 with WTIA certificates )

Post by **chimpboy** » Tue Oct 20, 2009 6:57 pm

one_waz wrote:Will i be right to weld 1inch solid stainless to mild steel plate with my mig using normal wire/argosheild?

What's it for?

Post by **pongo** » Tue Oct 20, 2009 7:53 pm

GO the other way and bolt it together. That will keep the boilies and sheeties happy, but prob send the engineers around the bend even more.

If your worried about Builders complaining, just use some liquid nails, then call the painters in to make it look good

Post by **eliteforce32** » Tue Oct 20, 2009 8:04 pm

v8lux i think everyone here is not saying you cant use normal mig wire or even use standard MS filler rod for tig but Awill4x4 was just stating some sound knowledge

......

and as for (the piss contest) stupid comments about someones aviator, shows somewhat of a childish attack on someone professionally...... everyone chill

Post by **Ice** » Tue Oct 20, 2009 11:04 pm

awill4x4 wrote:
v8lux wrote:wouldnt dream of using mild steel wire in a mig to weld stainless to mild steel ,if you dont believe me try it ,then put what you have welded in a vise and give it a good whack with a hammer and see what happens .
there is absolutely no strength using this method and dont let anyone tell ya otherwise. People get hurt due to miss -information if you are not sure ask a qualified expert (theres plenty of people claiming to be experts on here but dont believe everything you read just because they have a picture of a welder on their profile)
Cheers Brad
Ok Brad. What's your claim to Boilermaking fame? If you'd like to turn it into a pi$$ing contest I'm up for it.
I've got DOL tickets 1,2,4,7 (stainless endorsed) and 10 (welding inspector/supervisor) and Boilermaker proficiency certificate since 1978.
Regards Andrew.

Whats the difference currently... when i did the preessure ticktet course was 8g for mig welding

thats in nsw though

Post by **one_waz** » Wed Oct 21, 2009 12:34 pm

it is for a shockie mount, will be solid stainless welded into mild steel plate, similar to most shock mounts, its hard for me to explain, hopefully u all know what im talking about.

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