Editing v0.31:Magma-safe

{{quality|Exceptional|10:15, 12 August 2010 (UTC)}}{{av}}{{Buggy|withoutbugsection=1}}

'''Magma-safe materials''' are materials which will not melt, burn, evaporate, or otherwise take damage when in close contact with [[magma]]. Most frequently, this comes into play when using [[floodgate]]s operated by [[mechanism]]s.

For [[reaction]]s and custom buildings using the [MAGMA_BUILD_SAFE] token, only a material which is solid and stable at the temperature {{ct|12000}} (i.e. MELTING_POINT/BOILING_POINT/IGNITE_POINT/HEATDAM_POINT greater than 12000 and COLDDAM_POINT less than 12000) is supposed to be considered magma-safe; due to a bug, however, the game only checks that the material has no IGNITE_POINT defined. Furthermore, only [[bar]]s, [[block]]s, [[stone]], [[log]]s, and [[anvil]]s can be recognized as magma-safe - all other item types are considered unsafe, even if they are made of magma-safe materials.

In order to construct mechanisms from a magma-safe stone, simply ensure that they are the closest available stone to your [[mechanic]], ideally by placing a restricted [[stockpile]] around your [[mechanic's workshop]]. [[Burrow]]s can also be of assistance here, as dwarves will not attempt to pick up stone out side of their burrow assignments. However, if you have an active metalworking industry and have access to [[iron]] or [[steel]], constructing [[metal]] mechanisms is much more straightforward.

When linking a trigger to an object, the ''first'' mechanism selected is attached to the object, and the ''second'' is attached to the trigger.  Unless the trigger itself will be submerged in magma (as could be the case with a [[pressure plate]]), only the first mechanism (attached to the object that will be submerged) need be magma-safe. If you do not have any magma-safe stones available, you can also work around floodgate-based flow control by using [[screw pump]]s to pump the magma over [[wall]]-barriers, or using water to form [[obsidian]] to plug flows and channel through them to reopen them (necessity and invention and all that).

Constructions that resist magma are:

* Constructions ([[Wall]], [[Floor]], [[Ramp]], and [[Stairs]]) of any material can never melt or burn - there is nothing wrong with a [[wood]]en magma reservoir.  Natural (but not constructed) [[ice]] walls/floors/ramps/stairs may melt however.
* [[Fortification]]s will allow the passage of [[magma]]; however, if fortifications fill up to 7/7 depth, magma creatures will be able to swim freely through them.
* If not submerged (that is, not opened to let magma flow over/past/around them), [[door]]s, [[floodgate]]s, and raised [[bridge]]s (provided that there is no magma on the space the bridge would occupy when lowered) of non-magma-safe stone or metal are safe. So long as they are just in contact with magma, only acting as a passive "wall", they are fine. If opened, they will melt.
** Raised drawbridges have a notable exception, in that allowing magma to flow over the center of the area that the bridge would normally occupy when lowered ''will'' cause the bridge's components to heat up and potentially melt.
* A [[pump]] made with magma-safe metal pipes and screws and with magma-safe metal or stone blocks is fully magma-safe.
* A [[pump]] made with pipes and screws that are glass or any type of metal{{Verify}}, and blocks that are glass, or any type of metal{{Verify}}, is safe as long as no magma ever occupies the passable tile of the pump.
* [[Pump]]s made with [[wood]]en components will burst into flames the instant they are turned on.
* [[Pump]]s made with non-magma-safe stone blocks have been reported to melt after prolonged operation.

=== Glass ===
[[Glass]] behaves oddly in regards to magma.  All types of glass are technically magma safe, based on a melting point of 13600<!-- verified from disassembly--> (the same as that of bauxite); however, small glass objects (such as [[instrument]]s) seem to be instantly destroyed if dropped in magma{{verify}}. So glass [[statue]]s, [[screw pump]]s, and [[floodgate]]s are all fine when submerged in magma.

Glass barriers still require magma-proof mechanisms to operate without deconstructing.

== Game calculations ==
In the game, magma's temperature is exactly 12,000 °[[Temperature scale|U]], which is equivalent to 2,032°F, or about 1,111°C.

The chance of striking a magma-safe stone is roughly around 32%, not including the natural abundance of certain stone. It is important to note whether or not your fortress may already have access to magma-safe resources before attempting to deliberately find some.

==Magma-safe material==

The following materials will not melt when submerged in magma. Although true for any item/construction, it's worth specifically mentioning that this includes [[door]]s, [[floor hatch]]es, [[floodgate]]s, [[bridge]]s, [[screw pump]]s, and [[mechanism]]s.

<!--Editors: For your convenience, a BLANK ROW TEMPLATE:

{{MS table row|Type= |Matl= |Appear= |Temp= |Where= |Notes= }}

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{{MS table head}}

{{MS table row|Type=Stone|Matl=[[Alunite]]|Appear={{Raw Tile|`|7:7:1}} {{Raw Tile|•|7:1}}|Temp=13,690°U (3722°F/2051°C)|Where=All [[Igneous extrusive]]'''(L)''', [[Kaolinite]]'''(L)'''}}

{{MS table row|Type=Stone|Matl=[[Anhydrite]]|Appear={{Raw Tile|v|7:7:1}} {{Raw Tile|•|7:0}}|Temp=12,610°U (2642°F/1450°C)|Where=[[Gypsum]]'''(S)''', [[Satinspar]]'''(1)''', [[Alabaster]]'''(1)''', [[Selenite]]'''(1)'''}}

{{MS table row|Type=Stone|Matl=[[Basalt]]|Appear={{Raw Tile|#|0:7:1}} {{Raw Tile|•|0:1}}|Temp=12,160°U (2192°F/1200°C)|Where=[[Igneous extrusive]] layer stone}}

{{MS table row|Type=Stone|Matl=[[Bauxite]]|Appear={{Raw Tile|+|4:7:0}} {{Raw Tile|•|4:0}}|Temp=13,600°U (3632°F/2000°C)|Where=All [[Sedimentary]]'''(L)'''|Notes=dark red}}

{{MS table row|Type=Stone|Matl=[[Calcite]]|Appear={{Raw Tile|"|7:7:1}} {{Raw Tile|•|7:1}}|Temp=12,902°U (2934°F/1613°C)|Where=[[Limestone]]'''(S)''', [[Marble]]'''(S)'''|Notes=[[flux]] stone}}

{{MS table row|Type=Stone|Matl=[[Chert]]|Appear={{Raw Tile|&#61;|6:7:0}} {{Raw Tile|•|6:0}}|Temp=13,101°U (3133°F/1723°C)|Where=[[Sedimentary]] layer stone}}

{{MS table row|Type=Stone|Matl=[[Chromite]]|Appear={{Raw Tile|&#61;|0:7:1}} {{Raw Tile|•|0:1}}|Temp=13,645°U (3677°F/2026°C)|Where=[[Olivine]]'''(V)'''}}

{{MS table row|Type=Stone|Matl=[[Dolomite]]|Appear={{Raw Tile|`|7:7:1}} {{Raw Tile|•|7:1}}|Temp=16,507°U (6539°F/3619°C)|Where=[[Sedimentary]] layer stone|Notes=[[Flux]]}}

{{MS table row|Type=Stone|Matl=[[Gabbro]]|Appear={{Raw Tile|▒|0:7:1}} {{Raw Tile|•|0:1}}|Temp=12,160°U (2192°F/1200°C)|Where=[[Igneous intrusive]] layer stone}}

{{MS table row|Type=Stone|Matl=[[Ilmenite]]|Appear={{Raw Tile|.|0:7:1}} {{Raw Tile|•|0:1}}|Temp=12,457°U (2489°F/1365°C)|Where=[[Gabbro]]'''(S)'''}}

{{MS table row|Type=Stone|Matl=[[Kaolinite]]|Appear={{Raw Tile|&#61;|4:7:0}} {{Raw Tile|•|4:0}}|Temp=13,150°U (3182°F/1751°C)|Where=All [[Sedimentary]]'''(L)'''|Notes=dark red, [[porcelain]]}}

{{MS table row|Type=Stone|Matl=[[Mica]]|Appear={{Raw Tile|v|0:7:1}} {{Raw Tile|•|0:1}}|Temp=12,295°U (2327°F/1275°C)|Where=All [[Metamorphic]]'''(L)''', [[Granite]]'''(L)'''}}

{{MS table row|Type=Stone|Matl=[[Obsidian]]|Appear={{Raw Tile|▒|0:7:1}} {{Raw Tile|•|0:1}}|Temp=13,600°U (3632°F/2001°C)|Where=[[Igneous extrusive]] layer stone|Notes=value 3, can be "[[obsidian farming|manufactured]]"}}

{{MS table row|Type=Stone|Matl=[[Olivine]]|Appear={{Raw Tile|%|2:7:0}} {{Raw Tile|•|2:0}}|Temp=13,168°U (3200°F/1761°C)|Where=[[Gabbro]]'''(L)'''|Notes=green}}

{{MS table row|Type=Stone|Matl=[[Orthoclase]]|Appear={{Raw Tile|%|6:7:1}} {{Raw Tile|•|6:1}}|Temp=12,250°U (2282°F/1250°C)|Where=All [[Igneous intrusive]]'''(L)''', All [[Metamorphic]]'''(L)'''|Notes=yellow}}

{{MS table row|Type=Stone|Matl=[[Periclase]]|Appear={{Raw Tile|,|7:7:1}} {{Raw Tile|•|7:1}}|Temp=15,040°U (5072°F/2803°C)|Where=[[Marble]]'''(S)'''}}

{{MS table row|Type=Stone|Matl=[[Petrified wood]]|Appear={{Raw Tile|%|4:7:1}} {{Raw Tile|•|4:1}}|Temp=12,970°U (3002°F/1650°C)|Where=All [[Sedimentary]]'''(S)'''|Notes=bright red}}

{{MS table row|Type=Stone|Matl=[[Pitchblende]]|Appear={{Raw Tile|*|5:7:0}} {{Raw Tile|•|5:0}}|Temp=12,070°U (2102°F/1149°C)|Where=[[Granite]]'''(S)'''|Notes=purple}}

{{MS table row|Type=Stone|Matl=[[Quartzite]]|Appear={{Raw Tile|-|7:7:1}} {{Raw Tile|•|7:1}}|Temp=12,970°U (3002°F/1650°C)|Where=[[Metamorphic]] layer stone}}

{{MS table row|Type=Stone|Matl=[[Rutile]]|Appear={{Raw Tile|`|5:7:0}} {{Raw Tile|•|5:0}}|Temp=13,285°U (3214°F/1826°C)|Where=All [[Metamorphic]]'''(S)''', [[Granite]]'''(S)'''|Notes=purple}}

{{MS table row|Type=Stone|Matl=[[Sandstone]]|Appear={{Raw Tile|#|6:7:0}} {{Raw Tile|•|6:0}}|Temp=12,070°U (2102°F/1149°C)|Where=[[Sedimentary]] layer stone}}

{{MS table row|Type=Stone|Matl=[[Talc]]|Appear={{Raw Tile|&#124;|7:7:1}} {{Raw Tile|•|7:1}}|Temp=12,700°U (2732°F/1500°C)|Where=[[Dolomite]]'''(L)'''}}

{{MS table row|Type=Metal|Matl=[[Adamantine]]|Appear={{Raw Tile|╪|3:3:1}} {{Raw Tile|≡|3:1}}|Temp=25,000°U (15,032°F/8333°C)|Notes=Highest value/utility material in game}}

{{MS table row|Type=Metal|Matl=[[Iron]]|Appear={{Raw Tile|╪|0:7:1}} {{Raw Tile|≡|0:1}}|Temp=12,768°U (2800°F/1538°C)}}

{{MS table row|Type=Metal|Matl=[[Nickel]]|Appear={{Raw Tile|╪|7:3:0}} {{Raw Tile|≡|7:0}}|Temp=12,619°U (2651°F/1455°C)}}

{{MS table row|Type=Metal|Matl=[[Pig iron]]|Appear={{Raw Tile|╪|0:7:1}} {{Raw Tile|≡|0:1}}|Temp=12,106°U (2138°F/1170°C)|Notes=used in steel making process}}

{{MS table row|Type=Metal|Matl=[[Platinum]]|Appear={{Raw Tile|╪|7:7:1}} {{Raw Tile|≡|7:1}}|Temp=13,182°U (3214°F/1768°C)|Notes=High value metal}}

{{MS table row|Type=Metal|Matl=[[Steel]]|Appear={{Raw Tile|╪|0:7:1}} {{Raw Tile|≡|0:1}}|Temp=12,718°U (2750°F/1510°C)|Notes=Armor/weapons}}

{{MS table row|Type=Ore|Matl=[[Cassiterite]]|Appear={{Raw Tile|£|6:7:0}} {{Raw Tile|*|6:0}}|Temp=12,025°U (2057°F/1124°C)|Where=[[Granite]]'''(V)'''|Notes=Ore of [[tin]]}}

{{MS table row|Type=Ore|Matl=[[Galena]]|Appear={{Raw Tile|£|7:7:1}} {{Raw Tile|*|7:1}}|Temp=12,005°U (2037°F/1113°C)|Where=All [[Igneous extrusive]]'''(V)''', All [[Metamorphic]]'''(V)''', [[Granite]]'''(V)''', [[Limestone]]'''(V)'''|Notes=Ore of [[lead]] and [[silver]]}}

{{MS table row|Type=Ore|Matl=[[Hematite]]<sup>3</sup>|Appear={{Raw Tile|£|4:7:0}} {{Raw Tile|*|4:0}}|Temp=12,736°U (2768°F/1520°C)|Where=All [[Sedimentary]]'''(V)''', All [[Igneous extrusive]]'''(V)'''|Notes=Ore of [[iron]]<sup>3</sup>}}

{{MS table row|Type=Ore|Matl=[[Magnetite]]<sup>3</sup>|Appear={{Raw Tile|~|0:7:1}} {{Raw Tile|*|0:1}}|Temp=12,768°U (2800°F/1538°C)|Where=All [[Sedimentary]]'''(L)'''|Notes=Ore of [[iron]]<sup>3</sup>}}

{{MS table row|Type=Ore|Matl=[[Native platinum]]|Appear={{Raw Tile|£|7:7:1}} {{Raw Tile|*|7:1}}|Temp=13,182°U (3214°F/1768°C)|Where=[[Olivine]]'''(V)''', [[Magnetite]]'''(V)''', [[Chromite]]'''(S)'''|Notes=Ore of [[platinum]]}}

{{MS table row|Type=Ore|Matl=''[[Sphalerite]]''<sup>4</sup>|Appear={{Raw Tile|£|0:7:1}} {{Raw Tile|*|0:1}}|Temp=<s>''12,133°U (2165°F/1185°C)''</s>|Where=All [[Metamorphic]]'''(V)'''|Notes=Ore of [[zinc]]<sup>4</sup>}}

{{MS table row|Type=Wood|Matl=[[Nether-cap]]<sup>5</sup>|Appear={{Raw Tile|♠|1:0:0}} {{Raw Tile|▬|1:0:0}}|Temp=N/A|Where=[[Cavern]] (depth 3)|Notes=Naturally cold<sup>5</sup>}}

{{MS table row|Type=Special|Matl=[[Raw adamantine]]|Appear={{Raw Tile|£|3:7:1}} {{Raw Tile|*|3:1}}|Temp=25,000°U (15,032°F/8333°C)|Where=The depths|Notes=Ore of [[adamantine]]}}

{{MS table row|Type=Leather|Matl=[[Fire imp]]|Appear=|Temp=15,000°U (5032°F/2780°C)|Notes=}}
{{MS table row|Type=Leather|Matl=[[Dragon]]|Appear=|Temp=55,000°U (45032°F/25,044°C)|Notes=}}

{{MS table row|Type=Bone|Matl=[[Fire imp]]|Appear=|Temp=15,000°U (5032°F/2780°C)|Notes=}}
{{MS table row|Type=Bone|Matl=[[Dragon]]|Appear=|Temp=55,000°U (45032°F/25,044°C)|Notes=}}

{{MS table row|Type=Glass|Matl=Green glass|Appear={{Raw Tile|≡|2:2:1}} {{Raw Tile|■|2:0}}|Temp=13,600°U (3632°F/2001°C)|Notes=}}
{{MS table row|Type=Glass|Matl=Clear glass|Appear={{Raw Tile|≡|3:3:1}} {{Raw Tile|■|3:0}}|Temp=13,600°U (3632°F/2001°C)|Notes=}}
{{MS table row|Type=Glass|Matl=Crystal glass|Appear={{Raw Tile|≡|7:7:1}} {{Raw Tile|■|7:1}}|Temp=13,600°U (3632°F/2001°C)|Notes=}}

|}

'''Notes:'''
:1. Each stone is one of 16 [[color scheme|colors]] in the game.  Different un-mined stone of the same color have a different symbol to distinguish between them.  Once mined, the individual stones themselves can sometimes look identical if the color is the same. Use {{k|k}} to loo{{k|k}} at items or the terrain for specific information.
:2. '''°U''' = degrees in [[Main:Urist|Urist]], the measure of temperature within the Dwarf Fortress world. As far as is known, there is no functional difference between a material that melts at 12,005°U or 55,000°U - they are both equally "magma safe".
:3. There are three iron ores in the game (four if you count [[goblin|goblinite]]). Of these, only [[hematite]] and [[magnetite]] are magma safe.
:4. Sphalerite has ''no'' melting point, but '''boils''' at 12,133°U - further research is necessary in this context - use at your own risk for the time being. This is accurate for the actual mineral, which sublimes at this temperature rather than having a liquid state, but how it behaves in Dwarf Fortress may be unclear.
:5. [[Nether-cap]] logs are naturally cold at 10000°U or 0°C, rendering it fully magma safe, except that nether-cap products [[dump]]ed into magma are destroyed.

{{Magma FAQ}}
{{Category|Physics}}
{{Category|Magma safe materials}}