- Magnetic Materials[4]
- Nickel[10]
- Other Metals & Metal Products[10]
- Other Steel Products[7]
- Steel Round Bars[9]
- Steel Sheets[3]
- Steel Strips[2]
- Steel Wire[6]
kovar flat wire
kovar Alloy
kovar Alloy,ASTM F15,FeNi29Co17,Chinese 4J29.
Available in: Tube,Pipe, Sheet, Strip,Bar, Rod and Wire.
Detailed Description
Characteristics:
1.Kovar has a wide usage in the electronics industry, such as metal parts bonded to hard glass envelopes. These parts are used for such devices as power tubes and X-ray tubes, etc.
1.Alloy grades and chemical composition consistent with the provisions of table 1
the chemical composition of Kovar(%) | ||||||||||
C | P | S | Mn | Si | Cu | Cr | Mo | Ni | Co | Fe |
Not more than(≤) |
|
|
| |||||||
0.03 | 0.020 | 0.020 | 0.5 | 0.30 | 0.20 | 0.20 | 0.20 | 28.5~29.5 | 16.8~17.8 | Balance |
2.The tensile strength of wire in line with the provisions of Table 2
Status code | Status | Tensile strength,N/mm2 |
R 1/4I 1/2I 3/4I I | Soft state 1/4 Hard 1/2 Hard 3/4 Hard Hard | <585 585—725 655—795 725—860 >860 |
3.Strip tensile strength in line with the provisions of Table 3
Status code | Status | Tensile strength,N/mm2 |
R 1/4I 1/2I 3/4I I | Soft state 1/4 Hard 1/2 Hard 3/4 Hard Hard | <570 520—630 590—700 600—770 >700 |
4.Alloy average linear expansion coefficient in line with the Table 4
Alloy Grade | Specimen heat treatment system | The average linear expansion coefficienta,10-6/ °C | ||
20-300 °C | 20-400 °C | 20-450 °C | ||
kovar | Heated to temperature of 900± 20°Cin the hydrogen,hold for 1,re-heat to1100±20°C, hold for 15min;cooled to 200°C at a rate less than 5°C. |
----- |
4.6-5.2 |
5.1-5.5* |
5.Alloy typical expansion coefficient
Alloy Grade
| The average linear expansion coefficient a,10-6/ °C | |||||||
20-200 °C | 20-300 °C | 20-400 °C | 20-450 °C | 20-500 °C | 20-600 °C | 20-700 °C | 20-800 °C | |
kovar | 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
