Shanghai Tankii Alloy Material Co.,Ltd
| Payment Terms | L/C, T/T, Western Union |
| Supply Ability | 1000000 Pcs per Month |
| Delivery Time | 7-15 work days |
| Packaging Details | wooden case / Carton |
| Material | Fe-Ni-Co Alloy |
| Diameter | 1.00mm Min |
| Wall thickness | 0.02mm Min |
| Length | customized |
| Sample | Accepted |
| Surface | Bright / Polished |
| Brand Name | TANKII |
| Model Number | Kovar Alloy |
| Certification | ISO SGS |
| Place of Origin | Shanghai, China, |
View Detail Information
Explore similar products
White Colour Al2O3 Porous Alumina Tube Wear Resisting High Insulation
Inconel 601 High Temp Alloy Corrosion Resistant Ncf601 Round Bar Bright Surface
Ni29co18/ Uns K94610 (4J29) Kovar Expansion Precision Alloy Pipe / Tube
Resistohm 80 Ni80cr20 High Temp Alloy For Electric Heating Elements
Product Specification
| Payment Terms | L/C, T/T, Western Union | Supply Ability | 1000000 Pcs per Month |
| Delivery Time | 7-15 work days | Packaging Details | wooden case / Carton |
| Material | Fe-Ni-Co Alloy | Diameter | 1.00mm Min |
| Wall thickness | 0.02mm Min | Length | customized |
| Sample | Accepted | Surface | Bright / Polished |
| Brand Name | TANKII | Model Number | Kovar Alloy |
| Certification | ISO SGS | Place of Origin | Shanghai, China, |
| High Light | high temperature metal alloys ，high temperature wire | ||
Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used for Plastic Pin
(Common Name: Kovar, NiFeCo29, NiCoFe294,Nilo K)
| Controlled Expansion and Glass Sealing Alloys | |||
| German standard number | Tradename | DIN | UNS |
| 1.3912 | Alloy 36 | 17745 | K93600/93601 |
| 1.3917 | Alloy 42 | 17745 | K94100 |
| 1.3922 | Alloy 48 | 17745 | K94800 |
| 1.3981 | Pernifer2918 | 17745 | K94610 |
| 2.4478 | NiFe 47 | 17745 | N14052 |
| 2.4486 | NiFe47Cr | 17745 | - |
General Description
Kovar is a nominal 29%Ni-17%Co-54%Fe alloy that is a well-known glass-sealing alloy suitable for sealing to hard glasses. Kovar has a nominal expansion coefficient of approximately 5 ppm/°C and inflection temperature of ~450 °C (840 °F).
4J29 also known as Fe-Ni-Co Glass Sealing Alloy. it was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research.
Kovar (ASTM F15) has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials. This alloy has found wide application in power tubes, microwave tubes, transistors, and diodes. In integrated circuits, it has been used for the flat pack and the dual-in-line package.
Mainly used in electric vacuum components and emission control, shock tube, igniting tube, glass magnetron, transistors, seal plug, relay, integrated circuits lead, chassis, brackets and other housing sealing.
Chemical Composition
| alloy | C | Mn | Si | P | S | Ni | Cr | Co | Cu | Mo | Fe |
| 4J29 | ≤0.03 | ≤0.50 | ≤0.30 | ≤0.020 | ≤0.020 | 28.5~29.5 | ≤0.20 | 16.8~17.8 | ≤0.2 | ≤0.2 | balance |
| Code of condition | Condition | Wire | Strip |
| R | Soft | ≤585 | ≤570 |
| 1/4I | 1/4 Hard | 585~725 | 520~630 |
| 1/2I | 1/2 Hard | 655~795 | 590~700 |
| 3/4I | 3/4 Hard | 725~860 | 600~770 |
| I | Hard | ≥850 | ≥700 |
| Density (g/cm3) | 8.2 |
| Electrical resistivity at 20ºC(OMmm2/m) | 0.48 |
| Temperature factor of resistivity(20ºC~100ºC)X10-5/ºC | 3.7~3.9 |
| Curie point Tc/ ºC | 430 |
| Elastic Modulus, E/ Gpa | 138 |
The heat treatment process
| Annealing for stress relief | Heated to 470~540ºC and hold 1~2 h. Cold down |
| annealing | In vacuum heated to 750~900ºC |
| Holding time | 14 min~1h. |
| Cooling rate | No more than 10 ºC/min cooled to 200 ºC |
Coefficient of expansion
| θ/ºC | α1/10-6ºC-1 | θ/ºC | α1/10-6ºC-1 |
| 20~60 | 7.8 | 20~500 | 6.2 |
| 20~100 | 6.4 | 20~550 | 7.1 |
| 20~200 | 5.9 | 20~600 | 7.8 |
| 20~300 | 5.3 | 20~700 | 9.2 |
| 20~400 | 5.1 | 20~800 | 10.2 |
| 20~450 | 5.3 | 20~900 | 11.4 |
Thermal conductivity
| θ/ºC | 100 | 200 | 300 | 400 | 500 |
| λ/ W/(m*ºC) | 20.6 | 21.5 | 22.7 | 23.7 | 25.4 |
Style of supply
| Alloys Name | Type | Dimension | ||
| 4J29 | Wire | D= 0.1~8mm | ||
| 4J29 | Strip | W= 5~250mm | T= 0.1mm | |
| 4J29 | Foil | W= 10~100mm | T= 0.01~0.1mm | |
| 4J29 | Bar | Dia= 8~100mm | L= 50~1000mm | |
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
1981
Total Annual:
8000000-100000000
Employee Number:
90~100
Ecer Certification：
Verified Supplier
Shanghai Tankii Alloy Material Co., Ltd.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribb... Shanghai Tankii Alloy Material Co., Ltd.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribb...
Get in touch with us
Leave a Message, we will call you back quickly!