I want to fix holes in my car by welding sheet metal to it... what grade sheet metal would i use?

I NEED TO ORDER THIS CERTAIN MATERIAL SPECIFICALLY TO MANUFACTURE PARTS FOR A CAR. I NEED TO KNOW THE FULL MATERIAL NAME, CARBON CONTENT, ETC.I want to fix holes in my car by welding sheet metal to it... what grade sheet metal would i use?
1020 Low-Carbon Cold Rolled (CR), Pickled %26amp; Oiled. That's a fine steel for making your own body panels.





But, be advised that many a newer car (mid-eighties on) use thinner body panels made from a Higher Carbon steel. I believe this was to save material, and weight, and help gas mileage.





Such steels should not be welded with a gas torch, because of all the extra heat it creates. Also, depending on the area you're trying to fix, you could be replacing a load-bearing section with a low-carbon steel repair, which can weaken the structure. Even the heat from a MIG weld can mess with the grain structure, and cause cracks if it's a high-stress area. There are some parts that manufacturers INSIST you replace, rather than weld, for these very same metalurgical reasons.





You might be able to get a higher carbon steel sheet (harder to get than you'd think), but it will either be annealed when you get it, which makes it no better in terms of strength, or you will need to harden %26amp; temper it, which would be all but impossible unless you have the knowledge and equipment.





I believe the Factory Shop Manual will have such instructions. Unless your repair is to an old car, or just a very small fix, you may want to play it safe and check first.





If your car is an older model, you can go to town with the Mild Steel sheet. 16 guage is heavy, and forgiving of much shaping and sanding, but it is harder to work. 18 Gauge is probably the lowest I would go for a car panel...if it were not too big. Also, if you choose the galvanized route, be sure to remove all of the plating in the area you are going to weld. Not only are zinc fumes poisonous, the zinc will mess up a sheet metal weld in no time flat.





Good Luck, and be safe.I want to fix holes in my car by welding sheet metal to it... what grade sheet metal would i use?
!st it's not galvanized. 2nd the gauge or thickness can vary dependant on the year model of the car. I would suggest checking with US body and other suppliers to see if they offer a patch panel for the area of concern. if not perhaps changing the entire panel would be better depending on the location of the hole. if you are intent on making you own patch I would go to a salvage yard and buy a used hood or trunk lid that had some damage but still enough good metal for the size patch you need and make it out of that.
find a donor sheet metal car in a junk yard cut the panels you need and braze them to your car panels as fillers..
ummm why dont you go to a junk yard and see if they have an extra doorto your car in your color and replace the door, or a door of your color car and cut out a piece of it and put it on your holes it could work
Its just plain 16Ga Galvanized Iron Sheet metal.
get bondo





$5 for a small can





$10 for a large one





then sand it and paint it





very very smelly and toxic