| Categories | Alloy Steel Products |
|---|---|
| Brand Name: | JIN LAI |
| Model Number: | 4J32/4J36/4J38/4J40 |
| Certification: | ISO |
| Place of Origin: | CHINA |
| MOQ: | 5 ton |
| Price: | negotiable based on the quantity |
| Payment Terms: | T/T, Western Union, L/C |
| Supply Ability: | 6000 tons per month |
| Delivery Time: | 10-30 days |
| Packaging Details: | Standard seaport packing or as custom request |
| Grade: | precision alloy |
| Material: | 4J50 |
| Resistance (μΩ.m): | Low |
| Elongation (≥ %): | as standards |
| Ni (Min): | as standards |
| Technique: | Cold Rolled Hot Rolled |
| Shape: | ring,pipe,tube,plate,cake,wire,ect |
| Surface: | black surface or bright surface |
| Application: | many kinds of industry field |
4J29 ( Kovar ) 4J32 4J33 4J34 4J36(Invar ) 4J50 Capillary Tube
Kovar is a Nickel-Cobalt-Iron alloy that has compatible thermal expansion characteristics to Borosilicate Glass. This property allows Kovar to maintain a mechanical connection to the glass over a range of temperatures. Etched Kovar parts are commonly used for step lids, carriers, covers and electronic shims.
Kovar/4J29 Alloy Material Chemical Composition %
| C | Si | Mn | P | S | Ni | Fe | Cu | Cr | Co | Mo | |
| Max | 0.03 | 0.3 | 0.5 | 0.02 | 0.02 | 28.5/29.5 | bal | 0.2 | 0.2 | 16.8/17.8 | 0.2 |
Kovar/4J29 Mechanical property & Physical properties:
| Yield Strength(Mpa) | Tensile Strength(Mpa) | Elongation(%) | Hardness(HRC) | Density |
| 344 | 517 | 30% | 78HB | 8.36g/cm^3 |
Supply scope
Wire: Φ0.06∼10mm Surface: Bright and oxidation
Bar: Φ12∼200mm Surface: Bright and oxidation
Sheet: δ=1∼20*15∼350mm
Coefficient of Thermal Expansion (Nominal):
| ℃ | 20-200 | 20-300 | 20-400 | 20-450 | 20-500 | 20-600 | 20-700 | 20-800 |
| 10^-6/℃ | 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
Kovar/4J29 Applied field:
1.Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
2.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
FAQ
1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you
want.
If the size is not in stoct, our MOQ will be about 30kgs.
2. Customer do not have express account. How will us arrange the
delivery for sample order?
Just need to provide your address information, we will check the
express cost, you can arrange the express cost together with sample
value.
3.What's our payment terms?
We can accept LC T/T payment terms, it also depending on delivery
and total amount. Let's talk more in details after getting your
detailed requirements.
4.Do you provide free samples?
If you want several meters and we have stock of your size, we can
provide, customer need to bear the International express cost.
5.What's our working time?
We will give you reply through email/phone Online contact tool
within 24 hours. No matter working day or holidays.
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