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  • Kovar 4J29（YB／T 5231—2005）
  • Kovar 4J29（YB／T 5231—2005）
  • Kovar 4J29（YB／T 5231—2005）

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Kovar 4J29（YB／T 5231—2005）
Kovar 4J29（YB／T 5231—2005）
Note：1.Al≤O.10％,Zr≤O.10％,Ti≤O.10％the total content shall≤O.20％.
If the demander has special requirements, it shall be specified in the contract.
2.If the average line expansion coefficient meets the conditions specified in this standard, the nickel and cobalt content are allowed to deviate from the range specified in the table.
The size and shape of the alloy shall comply with the relevant provisions of GB / T14985《Expansion Alloy》
WhatsApp ：008615818120647
Phone ：008615818120647
Email ：Marilyn@faber-alloy.com

PRODUCT PARAMETERS


Chemical composition :

Product name

Chemical composition(％)

C

P

S

Mn

Si

Cu

Cr

Mo

Ni

Co

Fe

≤

4J29

O.03

O.020

0.020

0.5

O.30

O.20

0.20

0.20

28.5～29.5

16.8～17.8

Bal

Note：1.Al≤O.10％,Zr≤O.10％,Ti≤O.10％the total content shall≤O.20％.

If the demander has special requirements, it shall be specified in the contract.

2. If the average line expansion coefficient meets the conditions specified in this standard, the nickel and cobalt content are allowed to deviate from the range specified in the table.

3. The size and shape of the alloy shall comply with the relevant provisions of GB / T14985《Expansion Alloy》.


Tensile strength of the wire material

State code

state

tensile strength ／MPa

R

Soft

<585

1/4  1

1/4

585～725

1/2  1

1/2

655～795

3/4 1

3/4

725～860

1

Hard

>860


Tensile strength of the belt

State code

state

tensile strength／MPa

R

soft

<570

1/4  1

1/4hard

520～630

1/2  1

1/2hard

590～700

3/4  1

3/4hard

600～770

l

hard

>700

Hardness of the deep-flush belt

state

thickness／mm

HardnessHv

Deep blunt state

>2.5

≤170

≤2.5

≤165

Products name

Test heat treatment system

Average line expansion coefficient

ā／(10—6／K)

20～300℃

20～400℃

20～450°C

4J29

Heat to 900 ± 20℃ in a hydrogen atmosphere for 1h, reheat to 1100 ± 20℃ for 15min, and cool to less than 200℃ at no more than 5℃ / min


4.6～5.2

5.1～5.5①

Physical property

Name

Average line expansion coefficient

ā／(10—6／K)

20～200℃

20～300℃

20～400℃

20～450℃

20～500℃

20,600℃

20～700℃

20~800℃

4J29

5.9

5.3

5.1

5.3

6.2

7.8

9.2

10.2

Note:The upper limit is 5.6 for transistors
Typical expansion coefficient of the alloys

APPLICATION:For matching sealing with hard glass

FAQ

Q1. What is your terms of Packing?

A: Generally we pack your goods with Neutral English bag, PP Woven bag with PE inner bag. If you have your own legally registered sack design, we can pack your goods with your brand and design bags after getting your authorization letter.

Q2. What is your terms of payment?

A: Normally 30% TT as deposit in advance, and 70% TT after email the copy of BL. Or LC at sight. We'll show you the photos pf your goods and package before you arrange the payment.

Q3. What is your terms of delivery?

A: Normally we do FOB, CFR, CIF terms.

Q4. How about your delivery date?

A: Normally it will takes 10~15 days after receive the deposit. The specific delivery time depends on the items and the quantity of the order.

Q5. Can you produce according to the sample?

A: Yes, we can produce by your samples or the specification you provide.

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