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

Product Details:
Place of Origin: CHINA
Brand Name: JINXING
Certification: ISO 9001
Model Number: Kovar Foil
Payment & Shipping Terms:
Minimum Order Quantity: 50KGS
Price: 15~50USD/kg
Packaging Details: Plywood Case
Delivery Time: 25 work days
Payment Terms: L/C, D/A, D/P, T/T, Western Union
Supply Ability: 100000kgs/M

Detail Information

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
High Light:

ni based alloys


nickel based superalloys

Product Description

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

ASTM F15 , UNS K94610, Werkstoff Nr 1.3981 , DIN 17745 , MIL-I23011 Class 1, AFNOR NF A54-301, S.E.W 385



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

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 0 

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