Steel Ingot

Steel Ingots are items found in The Pitt add-on for Fallout 3. Finding all 100 gives you the Mill Worker achievement.

Abandoned Area (3)

 * 1) (3) In the Abandoned Area before you head to the Steelyard, to the left there is a mine cart with 3 ingots in it. (Note: The first time you enter, these ingots will be inaccessible. After obtaining at least 10 ingots from outside, returning to the room will reveal a Trog has torn a hole in the fence, allowing you access to the mine cart.)

Steelyard (79)

 * 1) (2) There are 2 ingots as soon as you enter the steelyard next to the dead slave.
 * 2) (2) You will find 2 in the first large dumpster to the left by the trailer with the couch on top of it.  You can access this dumpster by jumping over from the roof of the truck.
 * 3) (2) There are 2 ingots in the 2nd large dumpster to the left.  You can access this dumpster by jumping over from the roof of the nearby building to the far dumpster. Also possible to jump from the first large dumpster (standing on its northmost part).
 * 4) (3) There are 3 in the smaller dumpster next to the 3rd large dumpster on the left, there’s a dead slave in there as well.
 * 5) (2) Head up the stairs by the dumpsters. After you hop the broken fence, go right, then turn left.  There are 2 of them in between the 2 knocked over barrels.
 * 6) (2) Go north along the ledge, outside the fence. Looking down you should see 2 on top of a freight car in the middle. Carefully jump onto the third steel beam from the end (this is the one you need to climb on to get to the ones in #7 below) and walk out till you get to the freight car with the 2 ingots on it. Drop down and they’re yours.
 * 7) (3) Now head back up to where you dropped down on the freight car. This time continue across the steel beam to the end and drop down into the dumpster for 3 more.
 * 8) (2) Once again head back up the stairs but instead of going right go left, there is a small building to your right there are 2 of them sitting on a shelf. If you open the gate you went too far.
 * 9) (2) After you get the two in the small building head through the gate and go straight till you see a large dumpster. Climb up the stairs on top of the building on your left.  Take a run off the end of the roof and drop down into the dumpster.  There are 2 in there.  If you get between that round generator thing in the dumpster and some concrete blocks, you can get stuck, so the old adage to "save early, save often" definitely applies in this quest.
 * 10) (2) Now jump from the dumpster over the barbwire fence to the south head right until you reach a dead end. There is a dead slave and 2 ingots.  It may be easier to jump to the fence to the west first before jumping south.
 * 11) (2) Jump on top of the generator just behind you to find a plank and climb back over the fence and head back up the stairs till you reach the roof. Facing north you'll see another set of stairs. Walk down and pick up the 2 ingots from the ground. Careful of the 3 Trogs waiting to attack you.
 * 12) (3) Follow the path until you get to a gate.  Open the gate and go out to the left. Go down the hill to the end where there is a ditch and a dead slaver. There are 3 laying next to him. Make sure to bring some Rad-X and grab the Gamma Shield Armor off the dead slaver.
 * 13) (3) Turn to your left and continue into the radiated barrels there are 3 more in the middle.  Note that you can kill the 1 or 2 Trogs who hang out in this area from the other side of the fence. This is recommended because this is not a good area to get into a firefight in if you're not prepared for the radiation.
 * 14) (2) Go back up to the stairs and jump on top of the small roof, then cross the wooden planks to the next building.  Go to the end of that building's roof and you will see a makeshift bridge (metal structure with some wooden planks on it) crossing over to other buildings. There are 2 ingots in the middle of the bridge.
 * 15) (2) Continue across to the other side. Stay on roof of the building and head to its western end. There are 2 more ingots sitting on a roof you can drop down to.
 * 16) (2) After you get the 2 on the roof drop all the way down to the ground. There are 2 ingots on a shelf.
 * 17) (2) Head around the corner behind the stairs where you will find 2 more behind the tires.
 * 18) (2) Head south till you can’t go anymore and you see a set of stairs to the right. Climb the stairs and there are 2 on the first landing next to a dead slave named Wild Bill.
 * 19) (2) After you find Wild Bill continue up the stairs where there will be a makeshift shack with 3 Wildmen inside.  Kill them and take the 2 ingots by the fridge on the floor.
 * 20) (2) Facing away from the Wildman shack, follow the metal catwalk as it cross over a big pipe and turns left.  You should see a few Trogs waiting to ambush you on the perpendicular pipe.  A well-placed grenade can knock all three off the pipe.  Continue on the catwalk until it crosses under the same pipe the Trogs were on, then jump onto the pipe which runs parallel to the catwalk.  As the pipe turns right, you will see a Trog Brute waiting at the end.  Dispatch him and there will be two ingots in the pile of guts he was feeding on.
 * 21) (4) Turn around and get back onto the catwalk where the pipe bends.  At the wooden planks, drop down to the building below and head for the western edge of the roof. Drop down to the ground and head north around the corner of the building, then turn left down the narrow alley.  You should see an upright mining cart containing 4 ingots, a med kit and an ammo box.  Watch out as there will be some Trogs and maybe Wildmen, if they haven't killed each other off yet.
 * 22) (2) Now a short way north to a wall. Follow it eastwards. You'll end up following a fence. Follow it until it turns right and then until you reach a dead end. Behind some barrels is a dead slave with a combat shotgun and 2 ingots next to him.
 * 23) (4) Go all the way back up the stairs past the Wildman shack, along the catwalk to to where you dropped down from, keeping going across the roof and take the stairs that take you up to the top of the factory building. Turn left at the top of the stairs and take the first right you can. There are 4 of them back right hand corner by the dome and dead slave.
 * 24) (12) Now go back and climb the stairs to the very top of the structure you’ll hit the mother lode of 12 ingots on the end of the catwalk.  Be prepared for a tough fight with 4-5 Wildmen above and Trogs coming from below.
 * 25) (7) On your way back down you’ll see a really large and long conveyor belt, drop down on there and follow it to the end for 7 more ingots.
 * 26) (4) Head back up to the roof top with the domes on it (it's the large flat roof at the bottom of all those steps you climbed to get the 12 ingots and the same roof where you get the ingots from #23). Go south until you reach a chain-link fence (behind it are some big pipes). Looking down at the leftmost end of the fence you'll see a roof with 3 small domes. You'll have to get down there. If you have high HP you can try to jump down (my character with 355 HP didn't survive that fall). A safer way down: carefully slip around the chain link fence, and then push yourself against the large pipe running down the wall - that breaks your fall into smaller jumps so you'll reach the bottom unharmed. Med-X isn't a bad idea before making this drop.  Next, drop down to the platform with the 3 big silos on it. Head all the way east and turn right at the fence. There will be a dead slave with an Auto-Axe  and 4 ingots next to him. Some trogs will attack you after you've picked up the ingots, so be prepared.
 * 27) (2) Head back down to where all the freight cars are. There are 2 ingots at the end of the tracks by the collapsed tunnel.

Supply Plant (18)

 * 1) (3) Back by the freight cars there are a bunch of Protectrons lined up and a door. Enter the Supply Plant and head down the hallway.  In the second room you will come across 3 ingots.
 * 2) (8) Continue on to the lower level of the factory. Go down the hallway on the right and follow the tracks all the way to the end. You’ll come across a couple of Wildmen and a bunch of dead Trogs there are 8 of them in an overturned mine cart.
 * 3) (6) Now head down the hallway to the left and you will come across a door on your right and two dead Wildmen with bobby pins laying everywhere. Pick the lock on the door to find a nice supply of ammo and 6 ingots.
 * 4) (1) Continue up the stairs until you reach a room with a bed. There will be a unique Auto-Axe, the Man Opener, on the bed and to the right is the final Ingot.

Videos
thumb|left|Locations for all 100 Steel Ingots