It's almost impossible to survive without items made of metal. Guns, clothes, and lots of other things require various metal parts. You will have to go deep into the mines to get some ore and then melt it into ingots. 

blobid0.png Copper ore Can be smelted into a copper ingot
blobid1.png Tin ore Can be melted into a bronze ingot.
blobid2.png Iron ore Can be smelted into an iron ingot.
blobid3.png Chromite ore Used for the smelting of steel ingot.
blobid4.png Nickel ore Used for the smelting of high-end weapon alloy ingots.
blobid5.png Copper ingot Produced in the foundry from copper ore.
blobid6.png Bronze ingot You get bronze by smelting tin and copper in the right proportions
blobid7.png Iron ingot Produced in the foundry from iron ore. Steel is stronger than iron
blobid8.png Steel ingot Produced in the improved foundry from an ore blend
blobid9.png Weapon alloy ingot Suitable for creating a perfect weapon, and the best walls
blobid10.png Copper plate A required part for making weapons
blobid11.png Bronze plate A required part for making weapons
blobid12.png Iron plate Elegant plate made from an iron ingot on a workbench
blobid13.png Steel plate Made from steel ingots at the workbench. Adds protection against bites, gunshots, and punches.
blobid14.png Alloy plate A required part for making weapons
blobid15.png Copper nails Used for building and shoemaking
blobid16.png Bronze nails Used for building and shoemaking
blobid17.png Iron nails A necessary component for crafting of many items. You can't build a house, a stable, or a barn without it.
blobid18.png Steel nails Used for building and shoemaking
blobid19.png Nickel-plated nails Used for building and shoemaking
blobid20.png Copper parts Components needed for making primitive firearms.
blobid21.png Bronze parts Components needed for making simple firearms
blobid22.png Iron parts Components needed for making quality firearms
blobid23.png Steel parts Components needed for making durable firearms
blobid24.png Nickel-plated parts Components needed for making powerful firearms
blobid25.png Copper tools Copper tools are required for making and upgrading workshops
blobid26.png Bronze tools For making and upgrading workshops
blobid27.png Iron tools Iron tools are required for making and upgrading workshops
blobid28.png Steel tools Steel tools are required for making and upgrading workshops
blobid29.png Nickel-plated tools Alloy tools are required for making and upgrading workshops
blobid30.png Bronze rivet Rivets in clothing aren't just for decoration, they also provide extra protection
blobid31.png Iron rivet Used for crafting fine cloth
blobid32.png Steel rivet Rivets in clothing aren't just for decoration, they also provide extra protection
blobid33.png Wire Robust metal thread.