Blackstone Fragment: Required to access the Shadow Realm.
Trapdoors and Blast Furnace Access: You'll interact with RuneScape gold the Foreman and other NPCs to facilitate smithing.

With these requirements in mind, let's dive into the step-by-step process.

Step-by-Step Guide to Smithing Chromium Ingots

Smithing Chromium Ingots in OSRS is more involved than standard bar-making. It combines quest interactions, high-level smithing, and strategic preparation. Here's how to do it:

Step 1: Access the Shadow Realm

1. Travel to the Science District in Lassar Undercity. The Shadow Realm is located at the northern furnace of this district.
2. Step inside the puddle in front of the building. This puddle serves as the gateway to the Shadow Realm.
3. Ensure you have the Blackstone Fragment in your inventory. Without this item, you will not be able to enter the Shadow Realm.

Once inside the Shadow Realm, you'll need to locate the Remnant. Interacting with the Remnant triggers a dialogue sequence. Upon completion, you can teleport back to the Grand Exchange to prepare for the next step.

Step 2: Speak to the Blast Furnace Foreman

1. Go to the Blast Furnace near the Grand Exchange. Access it via the nearby trapdoor.
2. Speak with the Foreman and select the second dialogue option. This will allow you to set up the crafting process for Chromium Ingots.

At this point, you'll be ready to combine your ores into Chromium Ingots.

Step 3: Gather Required Materials

To smith one Chromium Ingot, you need:

Rune Ore x40
Adamant Ore x40
Coins x170,000

Given the high cost, many players buy these ores directly from the Grand Exchange or OSRS Powerleveling other players. While mining them yourself is an option, it is generally slower and less efficient than purchasing if your goal is quick ingot production.