ID: exp:crucible
Hardness: 3
Resistance: 10
Falls: False

Crucible

Crucible is a block added by ExPetrum.
Crucible can be obtained by crafting from 7 Copper Coated Fire Bricks:

Copper Coated Fire Bricks can be obtained by Welding a Copper Ingot and a Fired Brick:

A crucible has an interface that can be opened by right-clicking the crucible:

The bar on the left represents the temperature of the crucible.
The slot on the top is the input slot. The items that the player wishes to melt must go in there.
The slot on the bottom is the slot for a mold. An ingot mold must be placed in there and the liquid metal in the crucible(if present) will be transfered into the mold.
The big black space to the right is the alloy indicator. Any metal in the crucible will be diplayed there along with a percentage of the total amount of metal in the crucible:

The number on the bottom represents the amount of metal in the crucible. 1 ingot = 100 metal.
The crucible can hold up to 10000 units of molten metal.
The crucible can't be heated up on it's own. Instead it heats up to the temperature of the block below it or the block above it.
As such a crucible is typically placed atop the Forge.
Additionally if the Bellows were to be used on a crucible the bellows would instead increase the maximum temperature of the block below the crucible.
A crucible is typically used for alloying or melting.
Simple melting can be acheived by putting an ore/meltable item into the input slot of the crucible and waiting for it to melt.
Alloying requires melting multiple different ores/meltable items in any order to acheive the desired alloy composition inside the crucible.
It is worth noting that if a crucible has any molten metal it will heat up the item in the input slot at 4 times the rate.
An alloy can be made provided that the percentages of metals are within the bounds for the alloy(bounds are inclusive).
The following alloys with the following compositions exist:

Bronze:
- Copper: 80% - 90%
- Tin: 10% - 20%
Bismuth Bronze:
- Copper: 75% - 80%
- Zinc: 10% - 15%
- Bismuth: 5% - 10%
High Leaded Bronze:
- Copper: 70% - 80%
- Tin: 5% - 15%
- Lead: 15% - 25%
Brass:
- Copper: 60% - 70%
- Zinc: 30% - 40%
Manganese Bronze:
- Copper: 55% - 65%
- Zinc: 25% - 40%
- Manganese: 1% - 5%
Aluminum Bronze:
- Copper: 80% - 90%
- Aluminum: 10% - 15%
Sterling Silver:
- Silver: 90% - 95%
- Copper: 5% - 10%
Electrum:
- Silver: 20% - 80%
- Gold: 20% - 80%
Sterling Platinum:
- Sterling Silver: 95% - 99%
- Platinum: 1% - 5%
Invar:
- Iron: 50% - 70%
- Nickel: 30% - 50%
Solder:
- Tin: 70% - 90%
- Lead: 10% - 30%
Alnico:
- Aluminum: 5% - 15%
- Nickel: 15% - 25%
- Cobalt: 5% - 25%
- Iron: 35% - 75%
Duralumin:
- Aluminum: 90% - 95%
- Copper: 5% - 10%
Rose Alloy:
- Bismuth: 40% - 50%
- Lead: 25% - 40%
- Tin: 10% - 25%
Nichrome:
- Nickel: 70% - 80%
- Chromium: 20% - 30%
Vitallium:
- Cobalt: 60% - 65%
- Chromium: 25% - 30%
- Molybdenium: 5% - 10%