speedyxjs
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| posted on 25/4/07 at 01:17 PM |
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Chassis steel question
Ok, i know this has been asked loads of times before but just to be clear. I've just phoned a steel fabricators near to me and enquired about
the steel for my chassis.
I asked for:
25 x 25 x 42m
20 x 20 x 12m
40 x 40 x 6m
when i asked him the wall thickness, he said he was looking at about 2.5mm. I know in the book it says you should use 3mm. Will this make a
difference?
How long can i resist the temptation to drop a V8 in?
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Mr Whippy
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| posted on 25/4/07 at 01:33 PM |
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personally I'd still try and get 3mm but that's just me. Did you get told which grade it was?
just noticed the engine, get solid bar  
[Edited on 25/4/07 by Mr Whippy]
Fame is when your old car is plastered all over the internet
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DaveFJ
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| posted on 25/4/07 at 01:34 PM |
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2.5mm??? 3mm
I think you will find almost everyone is using much less than 2.5mm wall thickness!
Dave
"In Support of Help the Heroes" - Always
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Mal
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| posted on 25/4/07 at 01:37 PM |
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Steel Thickness
I think you have got your material thicknesses wrong. 2.5 and 3mm thick material is RHS (rolled hollow section)
The size range of this type of material goes up to about 400mm square in 15mm thickness, for building structures.
What you want is 1.5mm wall ERW (electric resistance welded tube). This is essentially sheet metal tube.
The 20mm material on your list in ERW may be 19mm.
For reference a lightweight race chassis uses 1.2mm thick ERW.
HTH
Mal
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speedyxjs
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| posted on 25/4/07 at 01:38 PM |
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Ok, is there anywhere online to get it? I've looked at Shop4Steel.com but they are REALLY expencive.
How long can i resist the temptation to drop a V8 in?
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Shaw
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| posted on 25/4/07 at 01:46 PM |
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Try steel stockists on yell.com
a quick search for your area turned up this
No results in Eastbourne so your search has widened to East Sussex
DENMAY STEEL & HIRE CO
137, Wellington Rd, Portslade, Brighton, East Sussex BN41 1DN
Tel: 01273 430399
Matches: steel
• 50 Tons Steel Stock • Beams, Angles, Flats, Tubes • Reinforcement Bending • Fabrications, Balustrading • Fire Escapes • Free Local Delivery
Steel Stockholders
Fowle & Co.Ltd
Tremlon House, Menzies Rd, St. Leonards-On-Sea, East Sussex TN38 9BQ
Tel: 01424 444666 Steel Stockholders
J.S Steel Services Ltd
25, Sedlescombe Rd North, St. Leonards-On-Sea, East Sussex TN37 7DA
Tel: 01424 465000 Steel Stockholders
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Alan B
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| posted on 25/4/07 at 02:27 PM |
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quote:
Originally posted by Mal
I think you have got your material thicknesses wrong. 2.5 and 3mm thick material is RHS (rolled hollow section)
The size range of this type of material goes up to about 400mm square in 15mm thickness, for building structures.
What you want is 1.5mm wall ERW (electric resistance welded tube). This is essentially sheet metal tube.
The 20mm material on your list in ERW may be 19mm.
For reference a lightweight race chassis uses 1.2mm thick ERW.
HTH
Mal
Absolutely dead right......I really wish people would forget the RHS terminology in this case.....I blame Uncle Ron ya know..
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speedyxjs
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| posted on 25/4/07 at 03:27 PM |
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quote:
Originally posted by Shaw
a quick search for your area turned up this
No results in Eastbourne so your search has widened to East Sussex
DENMAY STEEL & HIRE CO
137, Wellington Rd, Portslade, Brighton, East Sussex BN41 1DN
Tel: 01273 430399
Matches: steel
• 50 Tons Steel Stock • Beams, Angles, Flats, Tubes • Reinforcement Bending • Fabrications, Balustrading • Fire Escapes • Free Local Delivery
Steel Stockholders
Fowle & Co.Ltd
Tremlon House, Menzies Rd, St. Leonards-On-Sea, East Sussex TN38 9BQ
Tel: 01424 444666 Steel Stockholders
J.S Steel Services Ltd
25, Sedlescombe Rd North, St. Leonards-On-Sea, East Sussex TN37 7DA
Tel: 01424 465000 Steel Stockholders
tried them.
How long can i resist the temptation to drop a V8 in?
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02GF74
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| posted on 25/4/07 at 03:51 PM |
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I didn't make my chassis so you can all tell me to shut up, hopefully in a nice way - but B&Q do square steel tube, not sure but think about
1 mm wall, and maybe not to your dims.
Maybe worth a look in there - longest pieces would be 2 m but could be quite pricey.
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nludkin
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| posted on 25/4/07 at 04:44 PM |
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Parker steel do the right types of steel you are after online. But they are quite expensive. However, not as expensive as B&Q though
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Lawnmower
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| posted on 9/5/07 at 05:32 PM |
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quote:
Originally posted by 02GF74
I didn't make my chassis so you can all tell me to shut up, hopefully in a nice way - but B&Q do square steel tube, not sure but think about
1 mm wall, and maybe not to your dims.
Maybe worth a look in there - longest pieces would be 2 m but could be quite pricey.
~£5 a metre
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flak monkey
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| posted on 9/5/07 at 05:41 PM |
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Steel tube, you want square section ERW. in 1.5mm wall thickness for most of the chassis. If you are really worried about its strength go up to
2mm, which is certainly overkill.
It should be between £5 and £10 for a 6 metre length.
You can always use http://www.metalsupermarkets.co.uk/ if you dont have any other stockholders near you.
David
Sera
http://www.motosera.com
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davie h
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| posted on 9/5/07 at 06:30 PM |
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metal super market wanted £14 for a 6 metre lenght i found a small place about 5 mins from my house and they do the 25x25 2mm thick for £8.50 inc vat
for a 7.8 metre lenght skerry steel in blantyre but not to mucjh use for you sorry
[Edited on 9/5/07 by davie h]
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scudracer
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| posted on 11/5/07 at 12:08 PM |
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Is 1.62mm thickness available? (Pardon my ignorance). Also, can we buy SEAMLESS square sections?
Shameless-ad-supported-blog-that-belongs-to-my-friend plug - http://www.sevenbuilder.com & http://www.bikervoodoo.com
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flak monkey
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| posted on 11/5/07 at 12:13 PM |
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You cant buy seamless square tube. You do not need seamless for any part of the chassis whatsoever.
1.62mm thickness is 16g. But noone really supplies true 16g now, its all somewhere between 1.5 and 1.6mm wall thickness.
Sera
http://www.motosera.com
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Peteff
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| posted on 11/5/07 at 01:09 PM |
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But noone really supplies true 16g now.
They do at Twiggs in Matlock where I get mine. They do imperial or metric but the metric starts at 2mm wall. The imperial has rounder corners for some
reason.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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flak monkey
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| posted on 11/5/07 at 01:14 PM |
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quote:
Originally posted by Peteff
They do at Twiggs in Matlock where I get mine. They do imperial or metric but the metric starts at 2mm wall. The imperial has rounder corners for some
reason.
I spent ages looking for some earlier in the year, but gave up after being told on more than one occasion, by more than one stockholder that it wasnt
really made anymore... 
For our purposes it doesnt matter one bit anyway 
Sera
http://www.motosera.com
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Peteff
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| posted on 11/5/07 at 07:14 PM |
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For our purposes it doesnt matter one bit anyway
I agree completely, if you can get the 1.5x25mm it's perfect, I've seen some with 1mm wall which would be good for a lightweight build.
That had absolutely square sharp corners.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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scudracer
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| posted on 12/5/07 at 11:39 PM |
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No such steel available eh (square section seamless). I wonder what Caterham use for their chassis? ERW mild steel?
Shameless-ad-supported-blog-that-belongs-to-my-friend plug - http://www.sevenbuilder.com & http://www.bikervoodoo.com
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flak monkey
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| posted on 13/5/07 at 09:46 AM |
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For the last time, you do not need to use seamless tube for chassis construction. It offers no benefit whatsoever in terms of chassis stiffness
or strength.
ERW mild steel is perfectly good enough and will be what all the manufacturers use if they are making spaceframe chassis with square section
tubing...
Next people will be telling me using CrMo steel gives you a chassis with a higher stiffness.
Seamless is recommended for rollhoops (required by MSA?) as the tube can split along the weld when its being bent. Though its not all that common.
David
Sera
http://www.motosera.com
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