|
Molybdenum |
Tungsten |
Tatanlum |
Niobium |
Chromium |
Hardness(20℃) |
Stress-relief annealed:> 220(HV10) recrystallized>160 – 180[HV10] |
stress-relief annealed:>460(HV30) recrystallized>360(HV30) |
deformed:120 – 220 [HV10] recrystallized:80 – 125[HV10] |
deformed:110 – 180 [HV10] recrystallized:60 – 110[HV10] |
180 – 250 [HV10] |
Modulus of elasticity(20℃) |
320 [GPa] |
405 [GPa] |
186 [GPa] |
104 [GPa] |
294 [GPa] |
Coefficient of linear thermal expansion(20℃) |
5.2 · 10-6 [m/(m·K)] |
4.4 · 10-6 [m/(m·K)] |
6.4 · 10-6 [m/(m·K)] |
7.1 · 10-6 [m/(m·K)] |
6.2 · 10-6 [m/(m·K)] |
Thermal conductivity(20℃) |
142 [W/(m ·K)] |
164 [W/(m·K)] |
57.5 [W/(m·K)] |
53.7 [W/(m·K)] |
93.7 [W/(m·K)] |
Specific heat(20℃) |
0.25 [J/(g·K)] |
0.13 [J/(g·K)] |
0.14 [J/(g·K)] |
0.27 [J/(g·K)] |
0,45 [J/(g·K)] |
Electrical conductivity(20℃) |
17.9 · 106 [1/(Ω·m)] |
18.2 · 106 [1/(Ω·m)] |
8 · 106 [1/(Ω·m)] |
7.1 · 106 [1/(Ω·m)] |
7.9 · 106 [1/(Ω·m)] |
Specific electrical resistance(20℃) |
0,056 [(Ω·mm2)/m] |
0.055 [(Ω·mm2)/m] |
0.125 [(Ω·mm2)/] |
0.141 [(Ω·mm2)/m] |
0.127 [(Ω·mm2)/m] |
Electron work function |
4,39 [eV] |
4.54 [eV] |
4.3 [eV] |
4.3 [eV] |
4,5 [eV] |
Recrystallization temperature |
1100℃ |
1350℃ |
900-1450℃ |
850 – 1,300 °C |
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Post time: Sep-29-2019