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Kovar Material Manufacturer and Supplier
- 500 Metric Ton / Metric Tons per Month
- Shanghai
- T/T
Product Details
Brand Name: | Brilliance | Place of Origin: | China | Model Number: | BL-0093 |
Type: | Nickel Bar | Application: | Vacuum Electronics | Grade: | FeNi29Co17 |
Powder Or Not: | Not Powder | Ni (Min): | 29% |
Product Description
Kovar Material Manufacturer and Supplier
Kovar is a nickel-iron-cobalt, controlled expansion alloy. It's expansion characteristics match both borosilicate (or Pyrex) glasses and alumina ceramics. This alone ensures it is a highly popular controlled expansion alloys for hermetic sealing applications (also known as Glass to Metals Sealing). Brilliance Special Steel manufactures a variety of Kovar Alloy Products, including Kovar Plates, Bars,Wire,etc.
Kovar Mechanical Properties
Metallurgical Condition Annealed, Descaled
Yield Strength KSI (MPa) 40 (276)
Tensile Strength KSI (MPa) 75 (518)
Hardness HB 78
Elongation 50mm >20
Kovar Chemistry
Nickel Ni 29
Cobalt Co 17
Iron Fe Balance
Manganese Mn 0.5
Silicon Si 0.2
Carbon C 0.04
Kovar Physical Properties
Co-efficient of Thermal Expansion
20-100°C 10-6/°C 0.8 - 1.7
20-200°C 10-6/°C 2.2 – 2.9
Density g/cm³ 8.26
Curie Temp °F 815, °C 435
Melting Point °F 2640, °C 1449
Modulus of Elasticity at 20°C MPa 207
Specific Heat J/g- °C 0.11
Thermal Conductivity at 20°C W/m.k 17.3
Thermal Expansion W.m-¹°C 0.17
Electrical Resistivity mm²/m 49
Poisson's coefficient 0.317
A Versatile Controlled Expansion Alloy
Kovar has been in use for many decades as a controlled expansion alloy. However, despite its relatively long history, many people outside the engineering industry have never heard of Kovar.
What makes Kovar so unique is it's coefficient of thermal expansion. As a controlled expansion alloy, it shared some remarkable similarities to borosilicate glass (hard glass) and ceramic.
Kovar's coefficient of thermal expansion is not an accident, though. Going back in history, Kovar was carefully formulated to meet a specific need.
Contact Us
- Changzhou Brilliance Special Steel Co., Ltd.
- Contact nameDavid
- Phone86-519-89986880
- AddressXinbei Changzhou,Jiangsu
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