40d:Magma-safe

Magma-safe materials are known to include iron, glass, steel, bauxite, and adamantine, but currently it is difficult to control magma flow with floodgates since mechanisms must be made out of rocks, most of which are not magma-safe (Bauxite being a notable exception). [1]

Mechanisms made from raw adamantine are magma-safe, and will properly operate a magma-safe floodgate in a magma channel. The mechanism on the trigger need not be magma-safe, only the one on the floodgate. In order to construct mechanisms from raw adamantine, you must first allow its use for non-economic purposes in the stock screen (z and select 'stone'). You might wish to remove other stone-using jobs while adamantine is available for use.

Calculations

According to the raw data files, magma's temperature is somewhere between 1300°C and 1400°C, which translates to 2300°F–2500°F .

Materials that resist magma are:

Metal:

• Nickel — 2600°F (1427°C)
• Nickel silver — 2600°F (1427°C) ^[Verify]
• Iron — 2680°F (1471°C)
• Steel — 2710°F (1488°C)
• Platinum — 3000°F (1649°C)
• Adamantine — 15000°F (8315°C)

Stone:

• Bauxite — 3600°F (1982°C)
• Raw adamantine — 15000°F (8315°C)

Other:

• Ashes. If you can build a wood furnace, you can follow up with a magma smelter (built of ashes) immediately. This might be a bug.^{v0.27.169.33d}