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Chemical element
Tungsten is a chemical element; it has symbol W and atomic number 74. It is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a distinct element in 1781 and first isolated as a metal in 1783
Symbol: W
Melting point: 6,192°F (3,422°C)
Atomic mass: 183.84 u
Atomic number: 74
Discoverers: Juan José Elhuyar, Fausto Elhuyar
Boiling point: 10,030°F (5,555°C)
Block: d-block
You are welcome to make a block mod that uses tungsten as a material as a heat shield you can set the tungsten metal as more heat resistant. In this mod blocks only take damage if the heat is higher than their tolerance, otherwise they take zero damage.
just wanted to point out that depending o nthe technologie in use there might be differences.
and even with the tungsten alloys used they are usually set for a limited time of uses ebfore beeing changed out, atleast to my knowledge, and thus atleast for me it sounds as if there is atleast some sort of degrading over time while in use.
i did check for the reentry themperatur and tungsten specific and as far as i could find out depending on the reentry speed and angle its around a 1600°C to 2000°C.
pure tungsten would be at 3422°C melting themperature and while that is quite higher atleast to my understanding an alloy has usually a melting themperatur somewhere between the metals used for the alloy.
even if the themperatur doesnt melt it is would experience thermal expansion and contraction while going betwenn earth and orbit which will usually wear down stuff over time.
heat shields in rl get damaged by heat if the heat gets high enough. the heatshields of the space shuttles lost 1-2 mm each reentry.