- Product Details
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Quick Details
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Main chemical composition::
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Ni,Fe,Co
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Shape:
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wire,bar,plate,tube
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Finish condition::
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R, 1/4I/ 1/2I, 3/4I, I
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Certification:
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ISO9001/ROHS/BV etc
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All type::
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wire, strip,rod, pipe, tube, bar sheet,
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Stadrad::
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ASTM F15;DIN 17745;S.E.W.385;Werkstoff Nr.1.3981
Quick Details
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Ultimate Strength (≥ MPa):
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as standard
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Elongation (≥ %):
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30%
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Place of Origin:
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Jiangsu, China
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Main chemical composition::
-
Ni,Fe,Co
-
Shape:
-
wire,bar,plate,tube
-
Finish condition::
-
R, 1/4I/ 1/2I, 3/4I, I
-
Certification:
-
ISO9001/ROHS/BV etc
-
All type::
-
wire, strip,rod, pipe, tube, bar sheet,
-
Stadrad::
-
ASTM F15;DIN 17745;S.E.W.385;Werkstoff Nr.1.3981
Discount china factory offer Kovar Ni29Co18 strip with top quality Name:
| Kovar alloy | Chinese YB/T5231-93(4J29) |
| ASTM (F15) | |
| Nilo-k, | |
| UNS K94610(FeNi29Co17) |
We offer:
| Kovar Wire: 0.1mm- 9mm |
| Kovar Bar: 11mm- 200mm |
| Kovar Strip: 75-110mm*0.15-22mm |
| Plate Seamless and welded tubes also availabl e per request |
Kovar alloy,ASTM F15,Nilo-k,UNS K94610(FeNi29Co17),Chinese 4J29
1. Brif introduction:
Kovar is a nickel – cobalt ferrous alloy compositionally identical to Fernico 1, designed to be compatible with the thermal expansion characteristics of borosilicate glass (~5 × 10 −6 /K between 30 and 200 °C, to ~10 × 10 −6 /K at 800 °C) in order to allow direct mechanical connections over a range of temperatures. It finds application in electroplated conductors entering glass envelopes of electronic parts such as vacuum tubes (valves), X-ray and microwave tubes and some lightbulbs .
2. Property
(1)Main chemical composition:
| 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 |
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WireTensile strength in line with the provisions
Tensile Strength of wire in line with the provisions
| Status code | State | Tensile strength,N/mm2 |
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R 1/4I 1/2I 3/4I I |
Soft state 1/4 Hard state 1/2 Hard state 3/4 Hard state Hard state |
<585 585-725 655-795 725-860 >860 |
- Strip Tensile strength in line with the provisions
| Status code | State | Tensile strength,N/mm2 |
| R1/4I1/2I3/4II | Soft state1/4 Hard state1/2 Hard state3/4 Hard stateHard state |
<570520-630 590-700 600-770 >700 |
Linear Expansion coefficient in line
| Alloy Grades | Specimen heat treatment system | The average linear expansion coefficient α,10-6/ oC | ||
| 20-300 oC | 20-400 oC | 20-450 oC | ||
| kovar | In hydrogen atmosphere heated to 900 ± 20 oC, insulation 1h, and then heated to 1100 ± 20 oC, insulation 15min, to not more than 5 oC / min rate of cooling to below 200 oC released | —– | 4.6-5.2 | 5.1-5.5 |
(4)Typical Expansion coefficient
| Alloy Grades | The average linear expansion coefficient a,10-6/ oC | |||||||
| 20-200oC | 20-300oC | 20-400oC | 20-450oC | 20-500oC | 20-600oC | 20-700oC | 20-800oC | |
| kovar | 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
3.Specification: Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
4.Application: Used as glass sealing for electronic vacuum devices
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Tydddpical Expansion coefficient
Strip: Plastic flims warp + wodden case
| MOQ: |
We accepet both small quantity and large quantity wholesale orders,you can get discount by large quantity here |
| Sample Time: |
For stock product: 1 day can be sent For customize size:3-5days can be sent |
| OEM: | Accepeted |
| Payment term: | L/C,T/T,D/P,D/A,PAYPAL,WESTERN UNION,MONEY GRAM |
| Delivery Time: |
For stock size, we can send goods right now. Other products, uaually need 7-30 produce days according to order quantity |
