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Forum: Welding Sheet Metal 01-15-2014, 04:39 PM
Replies: 6
Views: 3,955
Posted By hotrodder
Welding aluminium softens it regardless of...

Welding aluminium softens it regardless of flavour or process. Granted with TIG the heat is more concentrated so you typically soften a smaller area than oxy fuel but the weld and HAZ will always be...
Forum: General Discussion 01-07-2014, 02:01 PM
Replies: 3
Views: 2,492
Posted By hotrodder
I haven't actually got around to cobbling...

I haven't actually got around to cobbling everything together yet as there's typically somebody about i can collar... they tend to complain more than a leccy motor but get the job done so it's...
Forum: Basic questions and answers 12-30-2013, 03:13 PM
Replies: 8
Views: 10,891
Posted By hotrodder
Yep, permanent marker is another method that...

Yep, permanent marker is another method that works. Colour in the area to anneal and the ink burns off at approx the right temp justs like acetylene soot. Soap/candles work like a match/lolly stick...
Forum: Welding Sheet Metal 12-30-2013, 02:32 PM
Replies: 27
Views: 16,250
Posted By hotrodder
It's the old 'two bottle shuffle' trick that the...

It's the old 'two bottle shuffle' trick that the BOC barcode has put an end to i.e. exchanging an 'aquired' BOC cylinder on someone elses account and/or having spare cylinders that don't attract a...
Forum: Welding Sheet Metal 01-16-2013, 05:49 PM
Replies: 9
Views: 5,662
Posted By hotrodder
None of the 3xx series alloys are hardenable by...

None of the 3xx series alloys are hardenable by thermal treatment, only by strain/work hardening which is something they do quickly. Strain hardening transforms some of the austenite to martensite...
Forum: Welding Sheet Metal 01-16-2013, 05:14 PM
Replies: 9
Views: 5,662
Posted By hotrodder
303 is a 'free machining' grade. It's got sulphur...

303 is a 'free machining' grade. It's got sulphur added to it to improve machinability, the downside to that is the sulphur screws up weldability and lowers corrosion resistance. It is weldable (308L...
Forum: Welding Sheet Metal 01-15-2013, 10:26 PM
Replies: 9
Views: 5,662
Posted By hotrodder
FWIW filler wire/rods are 'overalloyed' very...

FWIW filler wire/rods are 'overalloyed' very slightly. Obviously 304 and 308 aren't a perfect comparison but even if you compare typical numbers for 316L and er316L (i.e. filler wire) the Cr, Ni and...
Forum: Welding Sheet Metal 10-28-2012, 06:11 PM
Replies: 20
Views: 20,612
Posted By hotrodder
FWIW Everlast (and Longevity) are infamous on...

FWIW Everlast (and Longevity) are infamous on weldingweb forums. The following is effectively hearsay as the evidence got deleted but... they sponsered the site a few years back and each got given...
Forum: Welding Sheet Metal 10-19-2012, 03:04 PM
Replies: 11
Views: 6,652
Posted By hotrodder
Pretty much all been said but FWIW the 6xxx...

Pretty much all been said but FWIW the 6xxx series are fairly formable when annealed* (as it will be locally after welding). This is an oil filler/crankcase breather i make for aircooled VWs......
Forum: Basic questions and answers 10-16-2012, 07:51 PM
Replies: 8
Views: 6,418
Posted By hotrodder
3105 isn't one i've used so i'm guessing... Based...

3105 isn't one i've used so i'm guessing... Based on a quick play with google i'm thinking there's not a lot in it but 5005 is maybe a slightly better choice. 3105 is alloyed with both Mn and Mg i.e....
Forum: Basic questions and answers 10-02-2012, 09:05 PM
Replies: 14
Views: 7,835
Posted By hotrodder
As Steve said sometimes you have to make access...

As Steve said sometimes you have to make access and then fix that afterwoods. There's various other methods but without the right (expensive) kit it can be more time consuming with lesser results...
Forum: General Discussion 10-02-2012, 08:34 PM
Replies: 39
Views: 22,011
Posted By hotrodder
I'm with David regarding torches etc. I've only...

I'm with David regarding torches etc. I've only used one DHC briefly and while the flame is lovely my lasting memory is of something heavy/bulky/cumbersome- just my opinion as ergonomics are a...
Forum: Basic questions and answers 10-02-2012, 07:10 PM
Replies: 8
Views: 6,418
Posted By hotrodder
3003/3103 (aluminium + ~1.2% manganese) or even...

3003/3103 (aluminium + ~1.2% manganese) or even 1050/1100 (commercially pure aluminium) are more common choices for parts with lots of shape as they're ductile and work harden pretty slowly compared...
Forum: Welding Sheet Metal 09-09-2012, 12:29 PM
Replies: 11
Views: 7,988
Posted By hotrodder
It's not really welding either as you're not...

It's not really welding either as you're not supposed to melt the parent material if using it to join steel [/pedantic]. Bronze welding/fillet brazing are two terms used to differentiate it from...
Forum: Welding Sheet Metal 09-09-2012, 12:20 PM
Replies: 6
Views: 4,020
Posted By hotrodder
As said bronze is a copper alloy, there's various...

As said bronze is a copper alloy, there's various flavours so 'pure' doesn't mean much...

phosphor bronze is primarily a copper tin alloy, siliconbronze = copper + silicon, aluminiumbronze self...
Forum: Miscellanous products related to metalshaping 08-28-2012, 05:52 PM
Replies: 37
Views: 40,062
Posted By hotrodder
The Sellstrom cobalt blue flyer... the lenses...

The Sellstrom cobalt blue flyer... the lenses pictured look a green-blue colour to me. I thought the traditional cobalt blue lenses were actually blue? Heading more into general rambling territory......
Forum: Basic questions and answers 08-24-2012, 01:58 PM
Replies: 1
Views: 2,641
Posted By hotrodder
There are chemical/electrochemical tests albeit...

There are chemical/electrochemical tests albeit not as easy to find as say moly spot test kits for differentiating 304 from 316 stainless. I don't think the ally versions will get you closer than an...
Forum: Basic questions and answers 08-24-2012, 01:05 PM
Replies: 16
Views: 9,515
Posted By hotrodder
Cheers David. One i forgot to mention for the...

Cheers David. One i forgot to mention for the hobbiest is a potential deal with BOC for argon... a few years ago they came out with a reduced rental deal for argoshield (MIG/MAG mild steel),...
Forum: Basic questions and answers 08-22-2012, 08:44 PM
Replies: 16
Views: 9,515
Posted By hotrodder
I don't mean to shoot the messanger and (being...

I don't mean to shoot the messanger and (being some random bloke and a newbie on the forum) i'm obviously less trustworthy as a source than The Aluminium Assoc etc but a lot of nonsense or at least...
Forum: Basic questions and answers 08-20-2012, 08:26 PM
Replies: 16
Views: 9,515
Posted By hotrodder
Hey David, yeah i could have sheared a strip to...

Hey David, yeah i could have sheared a strip to use as filler. Personally i find it a relative ball ache and so typically only go that way when say a colour match is one of the more important...
Forum: Basic questions and answers 08-19-2012, 05:14 PM
Replies: 16
Views: 9,515
Posted By hotrodder
Welding ally softens it, TIG welds may be harder...

Welding ally softens it, TIG welds may be harder than oxyfuel but the weld and HAZ will still be softened. 'Precise' annealing temps vary a little with different flavours, the alloys typically used...
Forum: Basic questions and answers 07-19-2012, 04:40 AM
Replies: 8
Views: 8,895
Posted By hotrodder
Cheers guys. It is. Sometimes you get a smug...

Cheers guys.
It is. Sometimes you get a smug warm feeling when you get a beautiful finished part first time, other times it can be an infuriating education to get there... pulling/stretching things...
Forum: Basic questions and answers 07-17-2012, 08:27 PM
Replies: 8
Views: 8,895
Posted By hotrodder
Another vid showing the same process here......

Another vid showing the same process here... http://www.youtube.com/watch?v=YQm9g6g1kIw and one of several on hydroforming exhausts, this one using a pressure washer......
Forum: Welding Sheet Metal 03-05-2012, 09:45 AM
Replies: 21
Views: 13,544
Posted By hotrodder
1) Wire choice depends on the alloy being welded....

1) Wire choice depends on the alloy being welded. Welding sheetmetal with DCEN (steel, stainless etc) the wire ideally wants to be no thicker than the base metal. With ally it's less of a deal....
Forum: Welding Sheet Metal 02-29-2012, 01:44 PM
Replies: 5
Views: 2,961
Posted By hotrodder
Acetylene is dissolved in acetone and stored at...

Acetylene is dissolved in acetone and stored at low pressure, hydrogen is stored at high pressure as a gas. I'm not upto speed on the CGA fittings used in the US as they differ from the UK...
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