Kovar 29 alloy 4J29 kovar metal china supplier kovar plate ring manufacture

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$25.77 - $30.77 / Kilograms | 100 Kilogram/Kilograms (Min. Order)
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Overview
Quick Details
Place of Origin:
Liaoning, China (Mainland)
Type:
Nickel Pipe
Application:
Industry
Grade:
Nichrome
Ni (Min):
29%
Resistance (μΩ.m):
Stable
Powder Or Not:
Not Powder
Ultimate Strength (≥ MPa):
517
Elongation (≥ %):
30 %
Model Number:
Kovar 29
Brand Name:
DLDT
Standard:
ASTM
Material:
Kovar 29/4J29
Certification:
MTC
Surface:
Black or Bright
Product name:
Kovar 29 alloy tube round bar made in china
Supply Ability
Supply Ability:
20000 Ton/Tons per Year
Packaging & Delivery
Packaging Details
Usually the bright surface packed in wooden case
Port
Dalian
Lead Time :
About 45 to 60 days

Kovar 29 alloy 4J29 kovar metal china supplier kovar plate ring manufacture

 

Product Description

 Chemical compostion of Kovar 29/4J29

Element

Min

Max

Carbon

--

0.02

Nickel

--

29.0

Iron

Balance

Silicon

--

0.20

Manganese

--

0.30

Cobalt

--

17.0

 

Description of Kovar 29/4J29

Kovar alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Extensive quality controls are employed in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing, stamping and machining.

 

Applications of Kovar 29/4J29

Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.

This alloy has found wide application in power tubes, microwave tubes, transistors and diodes. In intergrated circuits, it has been used for the flat pack and the dual-in-line package.

 

Physical Properties of kovar 29

Specific gravity.......................................8.36                           Curie temperature

Density                                                                                        °F.................................................... 815

lb/cu in............................................... 0.302                               °C.................................................... 435

kg/cu m............................................... 8359                            Melting Point

Thermal conductivity                                                                    °F.................................................. 2640

Btu-in/ft²/hr/°F...................................... 120                                °C................................................. 1450

W/m-K.................................................. 17.3                          Modulus of elasticity

Electrical resistivity                                                                       psi x 10(6) ..................................... 20

ohm-cir mil/ft......................................... 294                               MPa x 10(3) .................................. 138

microhm-mm......................................... 490

 

Magnetic Properties of Kovar 29/4J29

Kovar alloy is magnetic at all temperatures below the Curie point. Magnetic properties will depend upon heat treatment; the lower the hardness, the higher the permeability values and lower hysteresis loss. Examples of permeability properties are shown in the following chart:

Flux Density

Treatment

1830°F (999°C)
30 min. - FC
Permeability

2010°F (1099°C)
20 min. - FC
Permeability

500
1000
2000
5000
10000
12000

1000
1400
2000
2300
3400
3000

1900
3500
5800
10000
8200
5000

Thermal Expansion Properties of Kovar29/ 4J29

The following are the average coefficient of expansion properties after annealing in hydrogen for 1 hr at 1650°F (900°C) and 15 minutes at 2010°F (1099°C) and cooled to room temperature within 1 hr. Material heat treated using this procedure should not exhibit any transformation when cooled to -112°F (-80°C) for 4 hrs. This was determined by means of metallographic examination.

Mean coefficient of thermal expansion as annealed.10(-6)/°C

Tested parallel to the direction of rolling. Material annealed 1830°F for 30 minutes,furnace cooling:

Yield
Strength

Tensile
Strength

% Elongation
in 2"

Hardness
Rockwell B

ksi

MPa

ksi

MPa

50

345

75

517

30

68

Quality Inspection

After Processing And Before Packing

1. Chemical Compositon Inspection

2.Nondestructive Inspection

3.Metallurgical Microscope Inspection.

4.Physical Property Inspection

5.Hardness Inspection

6.Heterogeinity Of Carbides

7.Other test needs by negotitate

FAQ

Q:Do you accept the sample order?
A: Yes, we accept the sample order. If you order the small piece in stock, it is free.

     But we do not pay for the freight cost.


2
 Q: How long is your delivery time?
A: Usually 45 to 60 days after your down payment, it also according to the material requirement
     and  the quantity you ordered.

Q: What is your terms of payment.
A: Payment less or equal 10000USD,100% T/T in advance. Payment more than 1000USD, 
30% T/T in advance, balance before shippment. Also accept the L/C at sight.


5.
Q:What is your working time?
A:Monday-Friday : 8:00AM-17:00PM (Beijing time, GMT+08.00) 
While by whatsapp you can contact me anytime if I am awake up.

Why US & Contact US

1) Honest: we will strictly adhere to the contract, you will get the exact quality and quantity

    from us. We never receive any complain from the clients for the quantity and weight. 
2) Competitive price with shipment in time.
3) Strictly control on the quality.
4) More than 16 years experience in the export.
5) Best service after sale: We will be responsible for any disputes and problems occured after    

    shipment, we assure  you that we will be responsible to the end once our service starts.

 

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