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Pickled / Polished Surface Nickel Based Alloys Kovar Foil For Glass Sealing

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Pickled / Polished Surface Nickel Based Alloys Kovar Foil For Glass Sealing

Brand Name : JINXING

Model Number : Kovar Foil

Certification : ISO 9001

Place of Origin : CHINA

MOQ : 50KGS

Price : 15~50USD/kg

Payment Terms : L/C, D/A, D/P, T/T, Western Union

Supply Ability : 100000kgs/M

Delivery Time : 25 work days

Packaging Details : Plywood Case

Material : Kovar Alloy K UNS K94610

Surface : Pickled , Polished

Standard : ASTM F15

Heat Treatment : Solution Annealed

Size : Customized

Application : Glass sealing

Density : 8.36g/cm3

Melting Point : 1450C

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Kovar Foil Alloy K / K94610 / ASTM F15 , Pernifer 2918, MIL-I-23011 class 1

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

  • Description

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.

Pickled / Polished Surface Nickel Based Alloys Kovar Foil For Glass Sealing


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