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Brand Name : Sealing Alloy 4J29
Model Number : Kovar / 29НК / 4J29
Certification : ISO 9001 and RoHS
Place of Origin : China
MOQ : 10KG
Price : USD 30~50/ kg
Payment Terms : T/T, Western Union, L/C, Paypal
Supply Ability : 30000KG per month
Delivery Time : 4-8 weeks
Packaging Details : Waterproof paper, Carton and Wooden Case
Shape : Strip, Foil, Sheet, Wire
Condition : Bright/ Oxidized; Soft/ Hard
Standard : YB/T5231-2005 / ГОСТ 14080-78
Color : Silver
Weight of coil : 1~45 KG
Kovar Alloy - Strip of Sealing Alloy 4J29 for Integrated Circuit Framework
Application: Vacuum device main seal structure material
Feature: At 20 to 450 degrees and having a linear expansion coefficient similar borosilicate hard glass, high Curie point, has good low temperature stability of the organization. Suitable for use in mercury discharge instrument. Rectangular hysteresis loop.
Specifications
| Grade | 4J29- Strip | 
| Thickness | 0.01~5mm | 
| Width | 4~250mm | 
| Weight of coil | 2-50 kgs | 
| Condition | Soft/ Hard; Bright/ Oxidized | 
Chemical composition(%)
| Grade | C | Si | Mn | P | S | Ni | Cu | Cr | Mo | Co | Fe | 
| 4J29 | ≤0.03 | ≤ 0.3 | ≤ 0.5 | ≤0.02 | ≤0.02 | 28.5~29.5 | ≤ 0.2 | ≤0.2 | ≤0.2 | 16.8~17.8 | Bal. | 
Physical properties

Mechanical properties
| 
 | 
 | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation, % | Hardness, HV | 
| 4J29 | Cold-rolling | 695 | 780 | 5 | 230 | 
| As annealed | 315 | 520 | 24 | 148 | 
|   | 
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