CyberGus

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Off the top of my head...
Mask off areas that will later be glued to the SS. Paint or send through dunk tank. Remove mask. Glue SS to spot that has no paint because it was masked.
I'm sure there are other/better ways. That's just off the top of my head.
It's pointless to make a vehicle out of stainless and then mask and paint just parts of it...??!?
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It's pointless to make a vehicle out of stainless and then mask and paint just parts of it...??!?
I wasn't saying I think some parts of the frame will be painted steel and some parts be stainless. I do not know. All I was saying is it is possible to glue painted steel to stainless steel.

If I had to guess, I'd say at least some places, however small or minor, will require painted steel connect to stainless steel. But this is only a guess.
 

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It's pointless to make a vehicle out of stainless and then mask and paint just parts of it...??!?
Tesla is going to do whatever makes sense from a cost/ first principals approach. If stainless isn’t required in some places, and it makes more sense from a cost perspective to use stamped steel for an internal part which is unlikely to rust regardless, they won’t hesitate to do so. If adding a paint step would make it more expensive then they won’t.

What makes most sense from a cost/ integrity perspective?

We already know there will be non-stainless parts on the truck. The front and rear castings for example. It’s almost certain the seat rails and many of the internal parts to the seats will be stamped steel. It’s not going to be 100% shiny stainless.
 

CyberGus

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Tesla is going to do whatever makes sense from a cost/ first principals approach. If stainless isn’t required in some places, and it makes more sense from a cost perspective to use stamped steel for an internal part which is unlikely to rust regardless, they won’t hesitate to do so. If adding a paint step would make it more expensive then they won’t.

What makes most sense from a cost/ integrity perspective?

We already know there will be non-stainless parts on the truck. The front and rear castings for example. It’s almost certain the seat rails and many of the internal parts to the seats will be stamped steel. It’s not going to be 100% shiny stainless.
Obviously the CT will not be "steel-free", but the exoskeleton will be providing the structure.
 

CyberGus

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I wasn't saying I think some parts of the frame will be painted steel and some parts be stainless. I do not know. All I was saying is it is possible to glue painted steel to stainless steel.

If I had to guess, I'd say at least some places, however small or minor, will require painted steel connect to stainless steel. But this is only a guess.
The problem is that you haven't glued anything to the steel, you've glued to the paint. Any maybe that will work also, but it's an unequal comparison to the MY construction.
 


Ogre

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Obviously the CT will not be "steel-free", but the exoskeleton will be providing the structure.
By definition, the exoskeleton will be stainless only. It would be pretty odd to have a blue quarter panel. Other, hidden structural components? Not as clear.

Keep in mind, Musk’s example of an aircraft having a structural skin has huge amounts of structure which is not visible. The truck is likely similar. A big percentage of the structure will be from the skin, but things like the B Pillar may very well be something else.
 

CyberGus

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By definition, the exoskeleton will be stainless only. It would be pretty odd to have a blue quarter panel. Other, hidden structural components? Not as clear.

Keep in mind, Musk’s example of an aircraft having a structural skin has huge amounts of structure which is not visible. The truck is likely similar. A big percentage of the structure will be from the skin, but things like the B Pillar may very well be something else.
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Off the top of my head...
Mask off areas that will later be glued to the SS. Paint or send through dunk tank. Remove mask. Glue SS to spot that has no paint because it was masked.
I'm sure there are other/better ways. That's just off the top of my head.
Masking, dunking and painting would be more expensive than simply using stainless steel to begin with. It would make no sense without a more compelling reason than trying to save the price difference between steel and stainless steel. What am I missing?
 

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I wasn't saying I think some parts of the frame will be painted steel and some parts be stainless. I do not know. All I was saying is it is possible to glue painted steel to stainless steel.

If I had to guess, I'd say at least some places, however small or minor, will require painted steel connect to stainless steel. But this is only a guess.
I agree with that, what I was disagreeing with is that any portion of the structural part of the exoskeleton would be made of painted steel. The door jambs are a structural part of the exoskeleton.
 

anionic1

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Masking, dunking and painting would be more expensive than simply using stainless steel to begin with. It would make no sense without a more compelling reason than trying to save the price difference between steel and stainless steel. What am I missing?
In some of the interior images of the CT with the doors open you can clearly see that the b pillar is painted. The structural battery pack housing is also painted steel and there is a lot that will be attached to that. The front and rear are aluminum castings and there is a lot attached to those. To think that this is just some thick stainless origami sitting on a skateboard doesn't complete the picture for me.

I am expecting to see a significant steel interior body with stainless panels adhered to it. Whether the paint is absent or removed for adhesion or maybe the paint has sufficient adhesion to accept an adhesive itself. Stainless is 2x the cost of typical steel and its slightly harder to work with. There could be 1500 lbs of interior body on the truck. The dipping process is a very small part of the paint cost. My bet is they will dip interior body components and glue on the stainless body panels. Elon likes glue.
 

anionic1

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I agree with that, what I was disagreeing with is that any portion of the structural part of the exoskeleton would be made of painted steel. The door jambs are a structural part of the exoskeleton.
So you think these painted stamped pillars are stainless in the image below. Why would they pay extra money to do that other than the slight chance of galvanic corrosion which they are very good at handling. There will be at least 1500 lbs of interior stamped body panels in the truck. They are very good at interior steel stamped body panels. Why reinvent that wheel when they don't need to.

The stainless is mostly for a wow factor. Thats why they specifically called it an "exoskeleton" they didn't say the entire body would be stainless. It will be more of a partial exoskeleton if they are really being honest like a turtle with a stainless shell and steel interior body parts. I mean look at the sail pillar that are supposed to open up for storage. That is one of the most critical components of a unibody frame and they are just going to let the exoskeleton swing open. Clearly there will be a substantial subframe there transferring the load. My bet is that it will be painted steel under there.
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