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0.5mm 0.8mm 52H Glass Sealing Vacodil 520 Resistance Wire
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Brand Name:OHMALLOY
Model Number:Ohmalloy-FeNi52
Certification:ASTM F30
Payment Terms:T/T, L/C,
Company Data
Verified Supplier
Contact Person
Qiu
Business Type:
Manufacturer Distributor/Wholesaler Exporter Trading Company
Officials:
Room 311, No.1211, Mudanjiang Road, Baoshan district, Shanghai
Quality:
Quality Certifitation Available
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Product Details
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Product Details
52H Glass Sealing52 Vacodil 520 Wire 0.5mm and 0.8mm large in stock with fast delivery
Product Description
The iron-nickel fixed expansion alloy is a series of fixed
expansion alloys that can be matched with soft glass and ceramics
with different expansion coefficients in a given temperature range
by adjusting the nickel content. The expansion coefficient and
Curie point increase with the increase of nickel content. This
combination gold is a widely used sealing structure material in the
electric vacuum industry
Chemical Composition
| Grade | C% | P% | S% | Mn% | Si% | Cu% | Cr% | Mo% | Ni% | Co% | Fe% |
| Alloy52 | Max 0.05 | Max 0.020 | Max 0.020 | Max 0.80 | Max 0.30 | / | / | / | 51.5~52.5 | / | Bal. |
Specifications
| Grade | Common Name | Common Name |
| Alloy52 | Vacodil520 | NILO 52 |
Physical Properties
| Grade | Density | Resistivity |
| Alloy52 | 8.25 g/cm3 | 0.43 |
Grain size of Alloy52
The grain size of the alloy deep-drawing belt should not be less
than level 7, and the grain size less than level 7 should not
exceed 10% of the area. When the average grain size of the strip
with a thickness of less than 0.13mm is estimated, the number of
grains along the thickness of the strip should be no less than 8.
Welding performance of Alloy52
The combined gold has good welding performance and can be brazed
and spot welded. The combination of gold and soft glass should be
pre-oxidized before sealing.
Coefficient of Expansion
| Alloy | Linear Coefficient of Thermal Expansion a,10-6/°C | |||||||
| 20-200°C | 20-300°C | 20-350°C | 20-450°C | 20-500°C | 20-600°C | 20-700°C | 20-800°C | |
| Kovar | 10.4 | 10.2 | 10.3 | 10.3 | 10.3 | 10.8 | / | / |
Heat Treatment For Alloy52
(1) Stress relief annealing In order to eliminate the residual
stress of parts after machining, stress relief annealing is
required: 430~540℃, heat preservation 1~2h, furnace cooling or air
cooling. [1]
(2) Intermediate annealing In order to eliminate the work hardening
phenomenon caused by the alloy in the process of cold rolling, cold
drawing and cold stamping, in order to facilitate the continued
processing. The workpiece needs to be heated to 700~800℃ in a
vacuum or protective atmosphere for 30~60min, then furnace cooled,
air cooled or water quenched.
(3) Pre-oxidation treatment When the combined gold is used as a
sealing material, it should be pre-oxidized before sealing. A
uniform and dense oxide film is formed on the surface of the alloy.
The parts are heated in saturated wet hydrogen at 1100°C for 30
minutes, and then oxidized in the air at about 800°C for 5-10
minutes. The weight gain of the parts should be 0.1~0.3mg/cm2
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Company Profile
Ohmalloy Material Co.,Ltd
Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy.
Ohmalloy Material Co.,Ltd have a full production line from melting, surface cleaning, rolling and slitting, full set of testing machine and can meet all kinds of technical requirement from customer. Our product is widely used in heating equipment, big steel mill, mineral, electrical equipment, food machinery, auto industry, aerospace industry. Our product not only is popular in domestic market, but also been exported to all over the world.
Our company aims to be the best-quality alloy producer in the
world. We insist on developing the more advanced alloy strip
technology, to serve all the customer, improve people’s living
level, make a more green earth in the future
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