MadModder
The Shop => Metal Stuff => Topic started by: awemawson on May 19, 2016, 07:15:00 PM
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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:
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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
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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.
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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.
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Thanks David :thumbup:
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i was always led to believe they are the same as a gas main ??