MoonMan
Registered Member
My reasoning behind A36 is that it is very common and it has a rather high ultimate strength.
CK5
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Clevis mount questions... Is this strong enough?
- Thread starter 1-8-4-3-6-5-7-2
- Start date
According to Matweb A36 has a yield strength of 36,300 psi and the suggested 1018 has a yield strength of 53,700 psi. So while I agree that A36 is common & easy to get, 1018 would be the better choice and it isn't all that hard to find either. Plus, the cold rolled won't have that nasty scale on it that A36 does, so weld prep will be a lot easier.
A36
1018 CRS
A36
1018 CRS
MoonMan
Registered Member
Cold rolled often has a higher yield strength because it has already undergone strain hardening during the formation process.
As a note, punched holes have a lower strength than drilled holes. This is because the punching procedure yields the material around the hole.
As a note, punched holes have a lower strength than drilled holes. This is because the punching procedure yields the material around the hole.
beastofablaze
1/2 ton status
Another note on punching. It will bow the flat bar. Take a 4 foot piece of 1 5/8 flatbar and it'll end up looking like a leaf spring... Alot less noticable on a piece like that but save yourself some trouble and use a drill press.
Metrodps, is that bumper for a K5 or something else?
1-8-4-3-6-5-7-2
Registered Member
Thanks everyone for the great information!
I don't really know much about metal types. I think that most of what I buy is A36 because it has some type of scale on it and makes my hands black when I touch it. I'll ask the shop if they have some 1018, I'm sure they do since it's a fairly large business.
ntsqd said:
I don't really know much about metal types. I think that most of what I buy is A36 because it has some type of scale on it and makes my hands black when I touch it. I'll ask the shop if they have some 1018, I'm sure they do since it's a fairly large business.
beastofablaze
1/2 ton status
That is millscale... it'll make your hands black and your welds will be weaker unless you grind it off. PITA... I wish I didn't have to deal with so much mild steel... cold rolled is cleaner and stronger.
hawkeye649
1/2 ton status
Spose it also matters what he is attaching this piece too. And since he is bolting, without busting out my calculator, since I couldn't do it anyways, I'd say they would probably break first. And if it's going to the frame... that would probably tear first.
