Who makes aluminum sliders?

I think the above two quotes provide the most actually useful information in the thread.

 

Maybe I wasnt clear.
I really hate to see 'calling somebody out' when providing just an unreferenced spreadsheet. Just a really big fan of verifiable data.

I don't believe that Modulus of 28E6 is correct as typical or average of any carbon steel (stainless and some other exotics, yes), I would say that listing that value as proof is incorrect (noting, it is not given that low in your other provided source of data). It certainly is a possible minimum value range, but not something that I think is fair to call average.

(Note I am a typical user of 4130 on almost everything I ever touch if it isnt aluminum, but I saw that unreferenced value and knew something was wrong definitely wrong there)

 

I'd think this quote would be a good fit...

With the difference in strength, stiffness, and hardness when compared to DOM, and only about a $53.20 increase in total cost for chromoly, it is obvious to us at SDHQ which material is better suited for the strongest bolt on design available.

 

We don't, and we weren't trying to sell any, just providing correct information about our product since it was brought up multiple times by a vendor.

 

You are just rambling about uncorrelated information... You have to define the sliders purpose of build and design. Yes we all know AISI 4130 has a higher ultimate strength vs AISI 1026 in fact 37% higher but you NEVER design anything to Failure because the material will yield. When you design using material allowables you use Yield which 4130 is only 4.5% stronger so is 4.5% in strength worth the 150% in cost? Yes 4130 is used for roll cages because of the higher ultimate strength and because they are designed for complete failure situation where material yielding doesn't matter. You would never reuse the cage again. Sliders are not used for complete failure situations and are not designed to take on full impacts to the side... Sliders are to protect your body panels landing or push against rocks, trees and etc. So when designing sliders you are worried about deflection into your truck panels. When you look at the equation for cantilever beams the only values that mater are Modulus of Elasticity which are THE SAME 29,700 KSI and moment of Inertia "Geometry". So if you use the sliders as intended than 4310 and 1026 are exactly the same beside material cost and skilled labor $$$ with no added benefits. But if you want to use your sliders for ramming protection then I suggest you reinforce your double C channel frames because that would fail before any welds and/or members fails. So I agree with @Mobtown Offroad there is no added benefits for weight saving since both material have the same density of 0.284 lb/in^3 so therefore you would just be wasting your $.

 

As an engineer, this is my favorite quote from this thread.

I think Mobtown and SDHQ should have a slider show down. Both fab up a set of your sliders, mount them to a frame and load them to failure. See who's slider holds up to the heaviest load. Then compare the weight savings and cost savings.

 

We don't offer DOM sliders, the $53.20 price difference is what the upgrade from DOM to 4130 was in our cost of material.

If you are comparing a different companies slider to ours, there is much more than just the material to compare..

The SDHQ Built Rock Sliders are CAD designed, employ unique mounting solutions tailored specifically for each application. We utilize the best materials for the strongest bolt on design available, our Rock Sliders are built in house for a precise fit and finish, allowing us to utilize mounting solutions that do not require any cutting, welding or drilling for installation. Using this unique mounting design with 3/16” thick gusseted steel mounting plates, the SDHQ Built Rock Sliders support the entirety of the slider. We chose to use 4130 .120” wall chromoly tubing over DOM tubing for strength, rigidity, and hardness.

As stated, ours are not cheap, but hands down they are 100% the strongest, lightest, fully bolt on sliders on the market.

 

The problem with "real world" testing is consistency. It works when you have a large enough sample size and enough time, but we don't have time for that... we want instant gratification!

 

I think everyone in here needs a hug.

 

Whats the strength loss from the weld heat @SDHQ OFFROAD ? The 4130 spec you listed is for the normalized spec, (I typically work with the 180ksi heat treated flavor).

 

Only speaking to heat affected zone (HAZ), not talking any about post weld stress relief or heat treatment, or stress or allowables in the weld itself...

Per MMPDS-01, table 8.2.2.1.1(b) and (c), HAZ strength is not too bad compared to the original N material... (keeping in mind that the original N heat treat is an open air quench, so generally the weld cooling open air quench isnt too severe an impact, plus the adjacent material usually tends to quench the weld HAZ somewhat compared to the original heat treatment in my experience).

Keep in mind that in my experience the actual receiving inspections for 4130 N generally shows significantly greater than Ftu =90 or 95 ksi from the mill, but there is a great deal of variation in general lot to lot, which keeps A and B basis values down low if you ever try to calculate them...

Tapered joints and gussets have higher allowables in the HAZ (as well as much preferred fatigue properties.)



As you certainly already know, rod selection is critical... but that is a whole nother discussion.
(more specific data is given in Bruhn Table C4.5 or ANC-5, predecessor to Mil-Hdbk-5)