Pure Nickel Capillary Tube
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Product Details:
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| Place of Origin: | CHINA |
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| Brand Name: | JINXING |
| Certification: | ISO 9001 |
| Model Number: | Kovar Foil |
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Payment & Shipping Terms:
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| Minimum Order Quantity: | 50KGS |
| Price: | 15~50USD/kg |
| Packaging Details: | Plywood Case |
| Delivery Time: | 25 work days |
| Payment Terms: | L/C, D/A, D/P, T/T, Western Union |
| Supply Ability: | 100000kgs/M |
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Detail Information |
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| Material: | Kovar Alloy K UNS K94610 | Surface: | Pickled , Polished |
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| Standard: | ASTM F15 | Heat Treatment: | Solution Annealed |
| Size: | Customized | Application: | Glass Sealing |
| Density: | 8.36g/cm3 | Melting Point: | 1450C |
| Highlight: | ni based alloys,nickel based superalloys |
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Product Description
Kovar foil (Alloy K) is used for high-power transmitting valves, transistor leads and headers, integrated-circuit lead frames, and photography flash bulbs. UNS K94610 Werkstoff Nr 1.3981 DIN 17745 ASTM F 15 AMS 7726 Wire AMS 7727 Bars and Forgings AMS 7728 Sheet, Strip and Plate MIL-I-23011 class 1 AFNOR NF A54-301 S.E.W 385 DILVER P
Kovar Foil SPECIFICATION
ASTM F15 , UNS K94610, Werkstoff Nr 1.3981 , DIN 17745 , MIL-I23011 Class 1, AFNOR NF A54-301, S.E.W 385
PRODUCT DATASHEET
Table 1 Chemistry Composition (Weight Percent)
| Element | C≤ | P≤ | S≤ | Mn≤ | Si≤ | Cr≤ | Cu≤ | Mo≤ | Ni | Co | Fe |
| Composition% | 0.03 | 0.020 | 0.020 | 0.5 | 0.3 | 0.20 | 0.20 | 0.20 | 28.5-29.5 | 16.8-17.8 | Remainder |
Notes:
1. The shape and dimensions of the alloys are in compliance with ASTM F15
2. We offer kovar strip coil in custom Tempers from Annealed to Full Hard
Table 2 Physical Properties
| Specific Gravity | 8.36 | |
| Density | 0.32 (Ib/cu in) | 8359 (kg/cu m) |
| Curie Temperature | 815 (°F) | 435 (°C) |
| Thermal Conductivity | 120 (Btu-in/ft2/hr/°F) | 17.3 (W/m-K) |
| Melting Point | 2640 (°F) | 1450 (°C) |
| Electrical Resistivity | 294 (ohm-cir mil/ft) | 490 (microhm) |
| Modulus of Elasticity | 20 (Psi x 106 ) | 138 ( MPa x 103) |
Table 3 Machanical Property
| Temper Designation | Temper name | Tensile Strength/MPa |
| A | Annealed | <585 |
| B | 1/4 Hard | 585-725 |
| C | 1/2 Hard | 655-795 |
| D | 3/4 Hard | 725-865 |
| E | Hard | >860 |
Table 4 Tensile Strength Strip
| Temper Designation | Tamper Name | Tensile Strength/MPa |
| A | Annealed | <570 |
| B | 1/4 Unannealed | 520-700 |
| C | 1/2 Unanealed | 590-700 |
| D | 3/4 Unanealed | 600-770 |
| E | Hard | >700 |
Table 5 Hardness of Deep Stamping Strip
| State | Thickness | Hardness,Hv |
| Deep Stamping | >2.5 | ≤170 |
| ≤2.5 | ≤165 |
Table 6 Coefficient of Linear Expansion
| Heat Treament of The Sample | Average Coefficient of Linear Expansion | ||
| Heat to temperature of 900±20ºC in the hydrogen,hold for 1h;re-heat to 1100±20ºC, hold for 15 min.;cooled to 200ºC at a rate less than 5ºC/min | 20-300°C | 20-400°C | 20-450°C |
| 4.6-5.2 | 5.1-5.5 | ||
Table 7 Thermal Coefficient
| 20-200°C | 20-300°C | 20-400°C | 20-450°C | 20-500°C | 20-600°C | 20-700°C | 20-800°C |
| 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
The linear expansion coefficient of the kovar alloy is similar to that of borosilicate glass at 20-450 ℃, the Curie point is higher, and the alloy has good low temperature structure stability. The oxide film of the alloy is compact and can be well infiltrated by glass. It does not interact with mercury and is suitable for use in instruments containing mercury discharge. It is the main sealing structure material of electric vacuum device.
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