Author Topic: What Steel are Scaffold Poles Made From?  (Read 1843 times)

Offline awemawson

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What Steel are Scaffold Poles Made From?
« on: May 19, 2016, 07:15:00 PM »
For a bit of devilment I subjected a short  (5") length of standard UK galvanised steel scaffold pole to the tender caresses of my newly completed hydraulic press.

No real surprise that it only took about 5 tons to effectively squash it flat, but there were still a few ripples, so I carried on to the full 60 ton to make an extremely flat tube  :lol:

BUT: as the initial (5 Ton) squash was happening I was surprised to see that the tube fractured where the bend radius was smallest - obviously not a malleable steel.

Now I'd always assumed that they were made from mild steel, but this little experiment-ette would seem to give the lie to that. All google will tell me is that they must conform to EN39 specification - but that's not the steel, it's an overall size type spec as far as I can tell.

.... so what's the steel  :scratch: :scratch: :scratch:
Andrew Mawson
East Sussex

geoff_s

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Re: What Steel are Scaffold Poles Made From?
« Reply #1 on: May 19, 2016, 09:01:01 PM »
Here's a list of the international standards for scaffolding, a couple of these deal with the steel used.
http://www.reliancescaffolding.com/scaffolding-standards.asp

Offline wgw

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Re: What Steel are Scaffold Poles Made From?
« Reply #2 on: May 20, 2016, 05:04:44 AM »
I always assumed it was mild steel, it is quite easy to saw and turns well. Expect it will be a grade with alloys for cold strength. Will be interested to find out.

Offline David Jupp

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Re: What Steel are Scaffold Poles Made From?
« Reply #3 on: May 22, 2016, 09:40:30 AM »
EN39 ->  S235GT - max 0.2% carbon, max 1.4% Manganese.

Earlier specs, give max 0.2% carbon, max 0.3% Silicon  (same mechanical properties as in EN39).

So a lowish Carbon, killed steel, perhaps with some Manganese.

Offline awemawson

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Re: What Steel are Scaffold Poles Made From?
« Reply #4 on: May 22, 2016, 11:35:38 AM »
Thanks David  :thumbup:
Andrew Mawson
East Sussex

Offline angus

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Re: What Steel are Scaffold Poles Made From?
« Reply #5 on: May 30, 2016, 10:14:58 AM »
i was always led to believe they are the same as a gas main ??