ZackDanger

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It’s been stated that big Bronco will include boron steel for strength in at least the roll bar.

Here is a link to its performance in the Bronco Sport under rescue extrication. The rigidity is impressive:

http://www.boronextrication.com/2021/05/30/2021-ford-bronco-sport-body-structure/

A-pillar did not deform or crush under the jaws… ultimately gave way while retaining its shape:

1622463382673.jpeg


Rocker Panels also include boron steel, and they didn’t even deform or crease under the ram:

1622463445401.jpeg







Admin updated with Bronco materials / construction info from:

https://www.bronco6g.com/forum/thre...erials-construction-on-2021-ford-bronco.3298/ (for anyone who hasn't seen it).

onco-aluminum-steel-body-panels-parts-material-jpg.jpg


Aluminum:
Aluminum Hood
Aluminum Front fenders
Aluminum Rear fenders
Aluminum Doors
Aluminum Tailgate

Steel:
Steel Frame
Steel Floor
Boron Steel sport tubes / cage





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ZackDanger

ZackDanger

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Fracturing before bending might mean failure or damage is more difficult to detect after an accident. And probably more expensive to repair if it is that resistant to reshaping.
Excellent point.

Conversely these parts might remain intact and hold their shape long past when another part would be damaged beyond repair…

I was thinking that if the rockers on the big bronco are also boron, and they are performing well, that might be why ford felt comfortable attaching the sliders to them.
 
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ZackDanger

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Stampede.Offroad

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Conversely these parts might remain intact and hold their shape long past when another part would be damaged beyond repair…
...
Much the same can be said for the aluminum panels. More resistant to initial deformation but they'll probably fracture when they do fail, driving repairs toward replacement as the less expensive option.
 

Razorbak86

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Excellent point.

Conversely these parts might remain intact and hold their shape long past when another part would be damaged beyond repair…

I was thinking that if the rockers on the big bronco are also boron, and they are performing well, that might be why ford felt comfortable attaching the sliders to them.
Interesting thought. I did some digging and located the following information about the Fortiform 980 GI grade steel. Note the rocker panels highlighted in the Applications diagram at the bottom.

https://fordauthority.com/2020/10/f...as-sole-gen-3-steel-supplier-for-2021-bronco/

https://www.bronco6g.com/forum/thre...rld-to-use-fortiform-980-gi-grade-steel.6706/

https://automotive.arcelormittal.com/products/flat/third_gen_AHSS/fortiform

F471EBC3-E493-4E90-AD50-45CBD0550565.png
 

Kos

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Holy guacamole!

I obviously missed that thread, but in my defense I only searched for existing threads with the words “extrication” “cut” “roll cage” “jaws of life” and “boron” which is why that one slipped through.

;)
It’s a setup Zach. I looked for 15 minutes to make sure there wasn’t a thread on the Radio Antennas. Couldn’t find one, posted and within 5 minutes I had a forum full of people yelling at me to pay attention and quit recycling news with links to the existing thread from five days earlier.

A few hours later they were combined and highlighted.
 

Superthornbird

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Holy guacamole!

I obviously missed that thread, but in my defense I only searched for existing threads with the words “extrication” “cut” “roll cage” “jaws of life” and “boron” which is why that one slipped through.

;)

No big deal
 

Kos

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Fracturing before bending might mean failure or damage is more difficult to detect after an accident. And probably more expensive to repair if it is that resistant to reshaping.
If it didn’t bend it would fracture in an accident. The ability to bend and return to the original state is a function of the steel being able to transfer kinetic energy throughout the vehicles safety structure and absorb the energy into the vehicle and not transfer it into the passenger compartment. Cars in the 50s/60s/70s were designed so the vehicle would survive the accident. Vehicles today are designed so the passenger survives the accident.

Same principle applies to bridges. If they were rigid they would snap in 2 the moment they were out under load.
 

VoltageDrop

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If it didn’t bend it would fracture in an accident. The ability to bend and return to the original state is a function of the steel being able to transfer kinetic energy throughout the vehicles safety structure and absorb the energy into the vehicle and not transfer it into the passenger compartment. Cars in the 50s/60s/70s were designed so the vehicle would survive the accident. Vehicles today are designed so the passenger survives the accident.

Same principle applies to bridges. If they were rigid they would snap in 2 the moment they were out under load.
Any chance you're available to give a training session down here in Arkansas :LOL:
bridge crack.png
 

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