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Fabricating with cold rolled steel vs hot rolled

bp71k5

bp71k5

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Anyone with an opinion on whether there's a noticeable structural advantage to using cold rolled vs hot rolled. The CRS is nearly twice the price so it seems like a reasonable question.


-Brian
 
assuming they are or the same alloy, the cold rolled will be, but in realilty it isn't going to make a difference unless you use a higher strength welding electrode (80ksi would be a safe bet), but the heat from the welding of the tabs will reverse the effects the cold rolling has.

Cold rolled will have tiny bit better abrasion resistance

The hot rolled is going to have scale on it and not be as pretty as its cold rolled counterpart.

Everything i have made has been with CREW or DOM. Dom is cold rolled FYI.
 
Cold rolled is way better dimensionally, and they generally use a better grade of mild steel when manufacturing it. I saw it specc'd in areas where dimensional tolerances were tighter, and sharp clean straight edges were necessary. IMO beyond those two differences you'll need to step up to a better alloy for any real 'upgrade'.

CRS usually right on the numbers, HRS is usually small (and scaly)
 
I dont think I realized the "scaly" texture was only a property of HRS. I've always had a tough time prepping the surface clean enough before welding so that may be a good enough reason to use CRS itself.


-Brian
 
eh, the carbon is only tough to deal with on large flat areas.. it does suck to remove, but any edge grinding/beveling, etc ain't bad...
 
Eesh, the HRS A36 plate from the local dealer is easily half the price of CRS 1018 steel plate. It makes me second guess my earlier opinion. It may be cheaper to just sand off the scale where i need to and then have the stuff sandblasted after it's all done.


-Brian
 
sandblasting rips it off quick.. unless your doing large sheets, like I used for my whole cargo area, it's not a big deal.... big flats suck to machine remove tho...
 
ryoken said:
sandblasting rips it off quick.. unless your doing large sheets, like I used for my whole cargo area, it's not a big deal.... big flats suck to machine remove tho...
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Yea, this is just 4 or 5" brackets, no more than 48" long. I can just flapdisc the areas that need it and then deal with the larger areas later on.

Thanks for the advice! It may end up saving me $300. :)


-Brian
 
I've been going to metalsupermarket lately. I'd be happy to look elsewhere if you know a place local.


-Brian
 
bp71k5 said:
I've been going to metalsupermarket lately. I'd be happy to look elsewhere if you know a place local.


-Brian
Click to expand...

Most times Naylors steel in Hayward is cheaper than Metal Supermarket. If you come home across the San Mateo bridge they aren't far off of the 92 hiway. Here's their number, 510-783-4688
 
4X4HIGH said:
Most times Naylors steel in Hayward is cheaper than Metal Supermarket. If you come home across the San Mateo bridge they aren't far off of the 92 hiway. Here's their number, 510-783-4688
Click to expand...

You were right, much better prices. Picking some up tomorrow.


-Brian
 
I work for Ryerson-Tull metals here in Atlanta, have you tried our locations in Cali? Get the sales rep out there to give you a product guide- it will answer all the questions you will ever have about the metals industry. Sizes, chemical make-up, strengths, etc...
 
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