Code:KOV(Kovar)
It is an iron-nickel-cobalt alloy with a low coefficient of thermal expansion near room temperature among metals, and is widely used for electron tube materials, etc., as it is suitable for sealing with hard glass and ceramics.
Electrical Resistivity [μΩm] |
Average TCR [×10-6/℃] |
---|---|
0.49 | *3500 |
Thermal Expansion Coefficient ×10-6/ |
Density g/cm3 (20℃) |
Melting Point ℃ |
|
---|---|---|---|
25~200℃ | 5.2 | 8.24 | 1450 |
25~300℃ | 5.1 | ||
25~400℃ | 4.9 | ||
25~45℃ | 5.3 | ||
25~500℃ | 6.2 |
Chemical Composition |
C | Si | Mn | Ni | Co | Fe |
---|---|---|---|---|---|---|
(%) | ≦0.015 | ≦0.5 | ≦1.0 | 28〜30 | 15.5〜17。5 | BAL |
Alloys | Type | Diameter (mm) |
---|---|---|
KOV | Wire | φ5.00~0.03 |
Ribbon | Please consult |
Alloys | Electrical Resistivity (23℃μΩm) |
---|---|
KOV | 0.49 |
Diameter (mm) |
Tolerance (mm) |
Cross section (mm2) |
Resistance Tolerance (%) |
Resistance Tolerance (Ω/m) |
Length (m/Kg) |
Weight (g/m) |
---|---|---|---|---|---|---|
5.00 | ±0.060 | 19.6 | ±5 | 0.0250 | 6.18 | 162 |
4.50 | ±0.050 | 15.9 | ±5 | 0.0308 | 7.63 | 131 |
4.00 | ±0.050 | 12.6 | ±5 | 0.0390 | 9.65 | 104 |
3.50 | ±0.050 | 0.62 | ±6 | 0.0510 | 12.6 | 79.3 |
3.20 | ±0.040 | 8.04 | ±6 | 0.0610 | 15.1 | 66.3 |
2.90 | ±0.040 | 6.60 | ±6 | 0.0742 | 18.4 | 54.5 |
2.60 | ±0.040 | 5.31 | ±6 | 0.0923 | 22.8 | 43.8 |
2.30 | ±0.040 | 4.15 | ±6 | 0.118 | 29.2 | 34.3 |
2.00 | ±0.030 | 3.14 | ±6 | 0.156 | 38.6 | 25.9 |
1.80 | ±0.030 | 2.54 | ±6 | 0.193 | 47.7 | 21.0 |
1.60 | ±0.030 | 2.01 | ±7 | 0.244 | 60.3 | 16.6 |
1.50 | ±0.030 | 1.77 | ±7 | 0.277 | 68.6 | 14.6 |
1.40 | ±0.030 | 1.54 | ±7 | 0.318 | 78.8 | 12.7 |
1.30 | ±0.030 | 1.33 | ±7 | 0.369 | 91.4 | 10.9 |
1.20 | ±0.030 | 1.13 | ±7 | 0.433 | 107 | 9.33 |
1.10 | ±0.030 | 0.950 | ±7 | 0.516 | 128 | 7.84 |
1.00 | ±0.030 | 0.785 | ±7 | 0.624 | 154 | 6.48 |
0.90 | ±0.030 | 0.636 | ±7 | 0.771 | 191 | 5.25 |
0.85 | ±0.030 | 0.567 | ±7 | 0.864 | 214 | 4.68 |
0.80 | ±0.020 | 0.502 | ±7 | 0.975 | 241 | 4.14 |
0.75 | ±0.020 | 0.442 | ±7 | 1.11 | 275 | 3.64 |
0.70 | ±0.020 | 0.385 | ±7 | 1.27 | 315 | 3.17 |
0.65 | ±0.020 | 0.332 | ±7 | 1.48 | 365 | 2.74 |
0.60 | ±0.020 | 0.283 | ±7 | 1.73 | 429 | 2.33 |
0.55 | ±0.020 | 0.237 | ±8 | 2.06 | 510 | 1.96 |
0.50 | ±0.010 | 0.196 | ±8 | 2.50 | 618 | 1.62 |
0.45 | ±0.010 | 0.159 | ±8 | 3.08 | 763 | 1.31 |
0.40 | ±0.010 | 0.126 | ±8 | 3.90 | 965 | 1.04 |
0.35 | ±0.010 | 0.0962 | ±8 | 5.10 | 1260 | 0.793 |
0.32 | ±0.010 | 0.0804 | ±8 | 6.10 | 1508 | 0.663 |
0.29 | ±0.010 | 0.0660 | ±8 | 7.42 | 1836 | 0.545 |
0.26 | ±0.010 | 0.0531 | ±8 | 9.23 | 2284 | 0.438 |
0.23 | ±0.010 | 0.0415 | ±8 | 11.8 | 2919 | 0.343 |
0.20 | ±0.006 | 0.0314 | ±9 | 15.6 | 3860 | 0.259 |
0.18 | ±0.006 | 0.0254 | ±9 | 19.3 | 4766 | 0.210 |
0.16 | ±0.006 | 0.0201 | ±9 | 24.4 | 6032 | 0.166 |
0.15 | ±0.006 | 0.0177 | ±9 | 27.7 | 6863 | 0.146 |
0.14 | ±0.006 | 0.0154 | ±9 | 31.8 | 7878 | 0.127 |
0.13 | ±0.006 | 0.0133 | ±9 | 36.9 | 9137 | 0.109 |
0.12 | ±0.006 | 0.01130 | ±9 | 43.3 | 10723 | 0.0933 |
0.11 | ±0.006 | 0.00950 | ±9 | 51.6 | 12761 | 0.0784 |
0.10 | ±0.006 | 0.00785 | ±9 | 62.4 | 15441 | 0.0648 |
0.09 | ±0.005 | 0.00636 | ±10 | 77.1 | 19063 | 0.0525 |
0.08 | ±0.005 | 0.00502 | ±10 | 97.5 | 24127 | 0.0414 |
0.07 | ±0.005 | 0.00385 | ±10 | 127 | 31512 | 0.0317 |
0.06 | ±0.004 | 0.00283 | ±11 | 173 | 42892 | 0.0233 |
0.05 | ±0.004 | 0.00196 | ±11 | 250 | 61764 | 0.0162 |
0.04 | ±0.003 | 0.00126 | ±12 | 390 | 96506 | 0.0104 |
0.03 | ±0.003 | 0.000707 | ±12 | 694 | 171567 | 0.00583 |