(2/13) Go north along the ledge, outside the fence.There are two of them in between the two knocked over barrels. After you hop the broken fence, go right, then turn left. (2/11) Head up the stairs by the dumpsters.(3/9) There are three in the smaller dumpster next to the third large dumpster on the left (west), there's a dead slave in there as well.It's also possible to jump from the first large dumpster (standing on its northern most part). You can access this dumpster by jumping over from the roof of the nearby building to the far dumpster or by jumping from the roof of the building onto the ledge with the fencing, walking across and dropping onto the dumpster. (2/6) There are two ingots in the second large dumpster to the left.It's also possible to move along the ledge outside the fence to the left of the truck, around the corner and then jump across. You can access this dumpster by jumping over from the roof of the truck. (2/4) You will find two in the first large dumpster to the left by the trailer with the couch on top of it.(2/2) The first two ingots are next to the dead slave as soon as you enter the steelyard.If you are not able to pick an Average lock ( Lockpick of 50) then you will be unable to get all 100. X shows the number of ingots at that spot and Y shows the number of ingots total one should have in their inventory after picking up the ingots at that spot. If you make one run, and follow the guide below, starting with the Steelyard, the (X/Y) will be used. Finding all 100 gives you the Mill Worker achievement/trophy. Being made of pure steel, fresh components to manufacture mint products would be something of a rarity in the Capital Wasteland. These bricks of steel would probably be melted down and used to make parts for armor, weapons, and gadgetry.

Fallout 4 chain link fence