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  #1  
Old 02-14-2006, 09:33 PM
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Question steel channel convert size to weight

I am trying to work out a conversion formula that would get me from size
of channel to weight per metre.

Details I have to hand is that the channel is 250 x 90 pfc

After much research I am told that the base of the channel is 250mm and is 15mm thick and the sides are 8mm thick(varying) and the channel is 1metre long. The answer is 35.5Kg per mtr. WhaT I want to know is how is that
worked out.
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  #2  
Old 02-14-2006, 11:12 PM
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Default Re: steel channel convert size to weight

I am not sure what you mean when you said "250 x 90 pfc"

You mention the sides of the channel are 8mm thick, but do not mention their height. That is the only piece of information missing that I would need to create the conversion.
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Old 02-15-2006, 12:16 AM
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Default Re: steel channel convert size to weight

The Base Is 250 And The Sides Are 90
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Old 02-19-2006, 04:40 PM
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Default Re: steel channel convert size to weight

Sounds like you have a square section channel, with the inside of the channel being 250 (base) x 90 (height). If you draw this up, you have three sections, the base is 250mm wide by 15mm thick. The sides are 105mm long by 8mm thick. If you work out the volume of these, then multiply by the density of the steel, you would get the wieght. The volume for a meter would therefore be (long, but simple calc) 5,430 cubic centimeters, or 5.430 litres. 5.43 is just multiplied by the density to give a weight. I think steel has a density of about 7, which would give you 38kg per meter. I can't see your original post, but divide it by 5.43 to give density. Or by the correct volume if I've missunderstood the dimensions.
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Old 02-20-2006, 12:57 AM
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Default Re: steel channel convert size to weight

If you dont add the base thickness to the side width, the results come out a bit closer to what he was looking for.

250 mm * 15 mm = 3750 mm≤
(90 mm * 8 mm) * 2 sides = 1440 mm≤

(3750 mm≤ + 1440 mm≤) = 5190 mm≤

5190 mm≤ * 1000 mm = 5190000 mm≥ = 5.19 liter

According to Reade.com the density of rolled steel is 7.93 and cast steel is 7.85.

5.19 liter * 7.93 kg/l = 41.1567 kilograms
5.19 liter * 7.85 kg/l = 40.7415 kilograms

Though the density data I found gives a result even further from what you were looking for. Using your estimate of a density of 7 would give an answer close what to he has.

5.19 liter * 7 kg/l = 36.33 kilograms
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Old 02-20-2006, 11:54 AM
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Default Re: steel channel convert size to weight

It is possible that the "varying" means that the 8mm wall thickness is a maximum, rather than an average. If this is so, then you need to get an average for this dimension.
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Old 02-20-2006, 11:57 AM
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Default Re: steel channel convert size to weight

The other possibility is that the 250mm and 90mm are outside measurements, and the channel is cut into this? Original poster, has this helped?
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Old 02-22-2006, 03:21 PM
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Default Re: steel channel convert size to weight

I suppose we should get a hand drawn picture of the channel with the measurements indicated. That would remove doubt.
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Old 03-10-2006, 01:31 AM
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Default Re: steel channel convert size to weight

Quote:
Originally Posted by Robert Fogt
I suppose we should get a hand drawn picture of the channel with the measurements indicated. That would remove doubt.

60*60mm hollow mild steel tube of thickness 3mm
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  #10  
Old 03-10-2006, 01:38 AM
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Default Re: steel channel convert size to weight

Quote:
Originally Posted by Unregistered
60*60mm hollow mild steel tube of thickness 3mm

60*60mm hollow mild steel tube of thickness 3mm or its weight per meter length
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