Title: Re: Stainless steel
Post by: derekwarner on June 17, 2018, 03:41:24 am
Baldrick.......all of the words suggest YES, however they do not qualify joint thicknesses or lengths
Our member Hammer or RGY has just soft soldered a carbon [galvanised?] steel plated hull...I would be interested to hear his thoughts {:-{ on soft soldering a 316 Grade plated hull
Title: Re: Stainless steel
Post by: Baldrick on June 17, 2018, 09:50:25 am
Baldrick.......all of the words suggest YES, however they do not qualify joint thicknesses or lengths
Our member Hammer or RGY has just soft soldered a carbon [galvanised?] steel plated hull...I would be interested to hear his thoughts {:-{ on soft soldering a 316 Grade plated hull
If the plates are galvanised it means they are zinc coated and zinc is very easy to solder . Watering cans have been made of the stuff since time immemorial with soldered seams. Best way is to lap seam, tin both mating faces and then run a hot iron down feeding some electricians solder in using capillary attraction. Perhaps our member used old baked bean tins for his plates which are tin coated (unless they are the aluminium ones). Tin of course is one of the constituent elements of solder so easy to work .
Title: Re: Stainless steel
Post by: Martin (Admin) on June 17, 2018, 10:18:57 am
Found this on Utube .... Hmmmm, not the best craftsmanship I've even seen...
Title: Re: Stainless steel
Post by: johnv on June 17, 2018, 10:53:16 am
Hi Martin it would be better to get a new one .He made a good old mess of that cheers John V
Title: Re: Stainless steel
Post by: Baldrick on June 17, 2018, 12:03:48 pm
Made a grand job of that ! for a numpty.
Title: Re: Stainless steel
Post by: steamboat66 on June 17, 2018, 01:26:13 pm
it CAN be soldered, but the flux required is quite aggressive, and likely therefore quite toxic. so it may be better to use good epoxy.
Title: Re: Stainless steel
Post by: Martin (Admin) on June 17, 2018, 02:00:54 pm
I was thinking of using a stainless steel bin to make a hull but I'm starting to think it may require too much heat to easily make the joints, I want to use a iron as opposed to a torch / blowlamp...
Title: Re: Stainless steel
Post by: nemesis on June 17, 2018, 02:06:32 pm
It depends on the grade of "stainless steel" I used high grade for orthodontic appliances and nothing worked except spot welding. Nemesis
Title: Re: Stainless steel
Post by: Mark T on June 17, 2018, 02:10:48 pm
Martin give the lads at cup alloys a call and they will advise you of the best flux to use. I found them to be brilliant when I needed to solder stainless to brass :-))
Title: Re: Stainless steel
Post by: Martin (Admin) on June 17, 2018, 02:36:36 pm
http://www.cupalloys.co.uk/home/
Will do.
Title: Re: Stainless steel ?
Post by: ajb63 on June 17, 2018, 06:00:49 pm
You can use Eutectic flux 157 for soft soldering stainless steels. It is acid based and very aggressive , but very efficient and flows well. Alan
Title: Re: Stainless steel ?
Post by: Martin (Admin) on June 17, 2018, 06:23:06 pm
I Think I'll experiment with a couple of 5L tins to start with. What can you buy that's cheap but still come in steel cans?
Title: Re: Stainless steel ?
Post by: Colin Bishop on June 17, 2018, 07:02:26 pm
Just out of interest Martin, what has prompted you to think about soldering a model together rather than employ more conventional building methods? Colin
Title: Re: Stainless steel ?
Post by: ballastanksian on June 17, 2018, 07:19:26 pm
I saw a miniature dustbin outside my superbuy cheapey shop this afternoon and as it is just galvanised steel, it might get you an easy solder 'Hull'??
I am sure you have a similar shop in town that stacks stacker boxes and bins etc outside and should therefore have a small bin.
You might be able to make an old fashioned soldering iron from a brass electric plug pin filed to shape and screwed via the convenient hole to an old BBQ implement handle or similar. Heat it with a blow lamp so keeping better control of your heat placement.
It might take some practice to use??
Title: Re: Stainless steel ?
Post by: Neil on June 17, 2018, 07:43:08 pm
with a propane torch like he was using, he would have been better using soft melt silver solder and a powder flux liquified with water.
Title: Re: Stainless steel ?
Post by: Martin (Admin) on June 17, 2018, 09:44:40 pm
Just out of interest Martin, what has prompted you to think about soldering a model together rather than employ more conventional building methods? Colin
A real boat is usually made of steel... and then my mind when dancing through the daisies.... !
Also, I've seen a couple of real nice metal made model boats over the years.
Title: Re: Stainless steel ?
Post by: Baldrick on June 17, 2018, 09:54:08 pm
What is wrong with these 2.62 Kg catering size baked bean tins ? There are lots of ways you can spice up the contents if appetite starts to flag before you get to the bottom http://www.devinequalityfoods.co.uk/heinz-baked-beans
Title: Re: Stainless steel ?
Post by: Martin (Admin) on June 19, 2018, 12:52:38 pm
Still musing over this idea...
Watched a UTube video by the very prolific Keith Appleton: https://youtu.be/vCPwPngOS0o (https://youtu.be/vCPwPngOS0o)
Two things:
1. I hadn't thought of bonding the hull plates with J-B Weld, maybe with additional rivets.
2. Didn't know J-B Weld Original – Illegal in the UK
All J-B Weld products have been discontinued in the UK. The packaging supplied by J-B Weld is illegal as it does not comply with EU Regulations and is therefore not possible to import to the UK.
A replacement adhesive range, Power Maxed Adhesives, is available at: http://www.powermaxed.com/adhesives/ The replacement to the J-B Weld Original can be found at: Power Maxed Steel Power Epoxy
Title: Re: Stainless steel ?
Post by: Colin Bishop on June 19, 2018, 01:29:10 pm
Amazon are still advertising JB Weld at the moment. Low stock by the look of it though. https://www.amazon.co.uk/JB-Weld-Reinforced-Household-Automotive/dp/B0006O1ICE/ref=sr_1_1_sspa/262-6391124-3704741?ie=UTF8&qid=1529409349&sr=8-1-spons&keywords=jb-weld&psc=1 Colin
Title: Re: Stainless steel ?
Post by: Martin (Admin) on June 19, 2018, 02:03:02 pm
What is wrong with these 2.62 Kg catering size baked bean tins ? There are lots of ways you can spice up the contents if appetite starts to flag before you get to the bottom http://www.devinequalityfoods.co.uk/heinz-baked-beans
Made like this it'll need to be really well painted! Then again they do say that "a coat of paint hides a multitude of tins" {-) O0 {-) O0 :-))
Title: Re: Stainless steel ?
Post by: Martin (Admin) on June 19, 2018, 04:45:54 pm
{-) {-) {-) ... Good one!
NB: That was my fist line of thinking, stainless steel, good 'welds', no painting!
.... i wonder if i could get Russell Hobbs to sponsor the build?! ( is that a British centric pun?! )
Title: Re: Stainless steel ?
Post by: johnv on June 21, 2018, 09:18:29 pm
Hi I was doing a bit of soldering on the kitchen table .The soldering iron slipet and burnt kitchen table .Her indoors is not very happy .I think I am in the bad books cheers John V
Title: Re: Stainless steel ?
Post by: Martin (Admin) on June 21, 2018, 09:40:59 pm
Fair warning John! {:-{
Title: Re: Stainless steel ?
Post by: andrewh on June 26, 2018, 08:16:03 am
Hi, Folks, from upside-down Australia
Martin you started with asking about stainless, and got the replies, Yes, but needs a serious flux. Serious in this case meaning genuinely dangerous (Hydrofluoric acid). Stainless protects itself from rust by forming an instant impervious oxide film of nickel and chrome oxides and these prevent solder wetting the steel (sticking). There are esoteric ways of dislodging the oxide film with fluxes or scratching it off with a glass brush under a film of oil. I would not plan to go with that
Then the discussion goes into mild and plated carbon steels, and the answer is still yes, and the fluxes are kinder.
Do some hands-on research on the bin you are considering - take a magnet and see if its magnetic. If it is than its probably one of the Ferritic Stainlesses 430 or similar. (austenitic stainlesses 304, 310, 316 etc)
Any road up - your idea is great - make a hull or boat in panels and join them like the panels of a stitch and glue hull with epoxy (or car body polyester resin) either resin needs to be filled till it is a a paste that will not slump.
I have rambled - hope something is either use or interesting andrew
Title: Re: Stainless steel ?
Post by: Martin (Admin) on June 26, 2018, 10:44:31 am
Thanks Andrew,
I'm going to have a bash with ordinary Plumbers solder and flux first, see how that goes and take it from there... :-)
Title: Re: Stainless steel ?
Post by: derekwarner on June 26, 2018, 11:52:44 am
Andrew ...you may well be correct when mentioning Hydrofluoric acid [HF]....but >>:-( we need members to keep their fingers attached to their hands
In more common cases, burnt Viton [FPM] Elastomer [from steam engine piston seals] can produce the same HF
Discussion on HF should really be associated with health & safety....as this acid eats skin...and sometimes cannot be contained by progressive removal surgery O0
Derek
Title: Re: Stainless steel ?
Post by: Martin (Admin) on June 26, 2018, 06:45:39 pm
Title: Re: Stainless steel ?
Post by: derekwarner on June 26, 2018, 11:00:48 pm
No............. %) ............ Derek
Title: Re: Stainless steel ?
Post by: johnv on June 26, 2018, 11:23:05 pm
Hi I know you can not solder a wooden kitchen table as I said in my last post burnt oures her in doors is still not happy . Cleaned it up to day with some tops and and polish don't look to bad now cheers John V
Title: Re: Stainless steel ?
Post by: Baldrick on June 27, 2018, 08:21:29 am
I would use some flux cored electricians solder myself , assuming you are now talking about tinned steel not aluminium. It has a low melting point and flows easily.
Title: Re: Stainless steel ?
Post by: Treble on July 25, 2018, 01:57:20 pm
Martin , I have some special stainless steel cored soft solder , approx 1.5 mm diameter. If you contact me direct , no problem in supplying you a short length . Trevor.
Title: Re: Stainless steel ?
Post by: Martin (Admin) on July 25, 2018, 04:53:51 pm