tegwin
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| posted on 12/6/06 at 01:39 PM |
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Welding stainless to mild?
I have a stainless(419 grade) 2B with sliding pillar suspension.
I am going to cut the suspension off and fit wishbones.
The question is, can I weld mild steel to the stainless chassis and get a strong weld with a MIG welder?
Thanks.
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Donuts
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| posted on 12/6/06 at 01:52 PM |
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do not do it.
lots of people say that you can with the right wire etc. but it will be a weak joint and you do not want your suspension to fall apart.
Fly Like a mouse, Run Like a cushion, Be the small Bookcase
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tegwin
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| posted on 12/6/06 at 02:21 PM |
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I suspected as much....
If I can not MIG weld the stainless to the mild what can I do?
Dunc
[Edited on 12/6/06 by tegwin]
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MikeRJ
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| posted on 12/6/06 at 02:33 PM |
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I guess the safest method would be to manufacture the suspension brackets from the same material as the chassis and get them TIG'd on.
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tegwin
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| posted on 12/6/06 at 02:43 PM |
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The way I was thinking of doing the job was to weld four stainless box sections across the front of the car to take the wishbones...However, a quote
for enough stainless box section sits at about £80...which is a lot!!!
The other possibility which would be much much cheaper would be to do it like this chap has:
Im just a little bit worried that it wont be strong enough as the chassis tubes are only really thin...?!?!
Any thoughts?
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gjs
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| posted on 12/6/06 at 03:19 PM |
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There is nothing wrong with welding mild to s/s as long as you use correct wire or rods,it has been done for years and years in industry
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tks
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| posted on 12/6/06 at 03:20 PM |
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yes you can weld it.
but you will need to do it with stainless wire.
Tig is preferred with pure argon!
and stainless sheet strips.
(same qually as the stainless you have got)
Tks
of course the weld will be weaker but stainless is weaker sow quet normal.
Mig is a bit cold, so i would use arc or Tig.
else make something up and just bolt it!
[Edited on 12/6/06 by tks]
The above comments are always meant to be from the above persons perspective.
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MikeRJ
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| posted on 12/6/06 at 04:32 PM |
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quote:
Originally posted by tegwin
Im just a little bit worried that it wont be strong enough as the chassis tubes are only really thin...?!?!
I don't like that one little bit, the amount of weld between the bracket and the chassis is very small. Asking for trouble IMO.
How about making brackets from 3-4mm plate which are concave at the chassis end so it wraps around the tube something like this (obvioulsy you will
need two per bracket).
[Edited on 12/6/06 by MikeRJ]
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907
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| posted on 12/6/06 at 04:53 PM |
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quote:
Originally posted by tegwin
I have a stainless(419 grade) 2B with sliding pillar suspension.
I am going to cut the suspension off and fit wishbones.
The question is, can I weld mild steel to the stainless chassis and get a strong weld with a MIG welder?
Thanks.
Hi Tegwin,
Are you sure it's 419 ?
Could that be 409 ?
Paul G
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tegwin
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| posted on 12/6/06 at 06:55 PM |
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Mike RJ....
A step up from yours is to get some very short lengths of box section and concave the end as shown in your photo and weld those on...that way the
holes are more likley to line up.......However, is that really going to be strong enoug? Im worried that the forces involve will try and twist the
chassis tubes?!?
I was told it was 419....the person who told me might be wrong...apparently its the same stuff they make exhausts out of....Its still slightly
magnetic and not very shiny
Dunc
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leto
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| posted on 12/6/06 at 07:34 PM |
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No offense but... how about spending the summer shopping for another kit and get some nice donor parts and next winter putting it together? 
“I'm gonna ride around in style
I'm gonna drive everybody wild
'Cause I'll have the only one there is a round”. (J. Cash)
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907
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| posted on 12/6/06 at 08:16 PM |
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409 is what's used for cheapo exhausts.
It can only be welded using 309 filler metal. Anything less and it will crack.
309 is also the alloy used to weld mild steel to stainless.
hth
Paul G
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tegwin
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| posted on 12/6/06 at 08:34 PM |
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leto....Because im not made of money!
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caber
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| posted on 12/6/06 at 11:58 PM |
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Err this is the LOCOST site!
Not everyone is building at locost but some of us are! If your existing suspension is original leave it and sell the car, start again on a new build
and don't be conned by some on here into putting a bike engine into it!
Caber
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MikeR
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| posted on 13/6/06 at 06:54 AM |
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come on, its got to be easier to weld on a new front suspension than build an entire car and front suspension.
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MikeRJ
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| posted on 13/6/06 at 07:56 AM |
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quote:
Originally posted by MikeR
come on, its got to be easier to weld on a new front suspension than build an entire car and front suspension.
Damn right, especialy as this car is SVA'd and on the road. Suggesting that the OP build a completely new car is just silly IMO.
To be blunt, any halfway well engineered solution will likely be far superior to the engineering on the rest of the car (note that I mean RH's
engineering, not your standard of build!).
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MikeR
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| posted on 13/6/06 at 08:07 AM |
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you haven't seen my build
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tegwin
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| posted on 13/6/06 at 08:59 AM |
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It hasnt been SVAd yet, but I dont see the point in spending hours setting up the sliding pillar suspension when it seems totaly crap....it has really
bad bump steer tendancies and I cant see a way of removing that....
It also wants a new set of struts for the sliding pillar...so why bother..might as well do the wishbone converstion...
Just got to figure out how :p
Dunc
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MikeR
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| posted on 13/6/06 at 09:41 AM |
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have you tried contacting robin hood - they might have some suggestions as i'm sure its now an option.
In fact isn't volvosport on here the technical person at RH now?
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timf
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| posted on 13/6/06 at 09:53 AM |
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dosn't mnr dor an inhouse conversions aswell
A prisoner of war is a man who tries to kill you and fails, and then asks you not to kill him."
- Sir Winston S. Churchill, 1952
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leto
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| posted on 13/6/06 at 11:32 AM |
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If the car isn't finished another kit is not an option, sorry.
How about a mild steel sub frame? If you can spread the load well enough the weaker welds and thin tub walls won't be a problem.
“I'm gonna ride around in style
I'm gonna drive everybody wild
'Cause I'll have the only one there is a round”. (J. Cash)
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Volvorsport
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| posted on 13/6/06 at 07:08 PM |
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all RH chassis are mig welded .
we had a discussion about kits to re engineer the front and back to existing cars , from our point of view its easier to build a new car .
the box section idea for the wishbone mounts seems like the easiest option , give RH a ring im sure well sell you some box section for the job . we
may have som esuitable wishbones for the job also .
www.dbsmotorsport.co.uk
getting dirty under a bus
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MikeR
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| posted on 13/6/06 at 07:28 PM |
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See knew he'd help. Well done that man.
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907
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| posted on 13/6/06 at 07:48 PM |
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Hi Volvorsport.
Just to satisfy my curiosity, is it 409 that's used on RH chassis?
Paul G
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Volvorsport
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| posted on 13/6/06 at 09:04 PM |
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ill have to check tomorrow .
www.dbsmotorsport.co.uk
getting dirty under a bus
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