Железо никель кобальтовый сплав ASTM F15 kovar сварочная проволока

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iron-nickel-cobalt alloy ASTM F15 kovar welding wire

 

Product Description

 

Kovar alloy is a vacuum melted, iron-nickel-cobalt alloy that is widely used in the electronics industry. Kovar is a nickel-iron-cobalt, controlled-expansion alloy which contains 29% nickel. Its coefficient of expansion, which decreases with rising temperature to the inflection point, matches the expansion rate of borosilicate glasses and alumina ceramics.

 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 integrated circuits, it has been used for the flat pack and the dual-in-line package.

Chemical Composition

GradeC%P%S%Mn%Si%Cu%Cr%Mo%Ni%Co%Fe%
KovarMax 0.03Max 0.020Max 0.020Max 0.50Max 0.30Max 0.20Max 0.20Max 0.2028.5-29.516.8-17.8Bal.

 

Specifications

GradeUNSWerkstoff Nr.
KovarK946101.3981

 

Physical Properties

GradeDensityMelting Point
Kovar8.17 g/cm31449°C

 

Mechanical Properties

GradeTensile Strength N/mm²
Soft1/4 Hard1/2 Hard3/4 HardFull Hard
Kovar Strip<570520-630590-700600-770>700
Kovar Wire<585585-725655-795725-860>860

 

Coefficient of Expansion

AlloyLinear Coefficient of Thermal Expansion a,10-6/°C
20-200°C20-300°C20-400°C20-450°C20-500°C20-600°C20-700°C20-800°C
Kovar5.95.35.15.36.27.89.210.2

 

Size Range
Kovar Wire: 0.1mm-9mm
Kovar Bar: 11mm-200mm
Kovar Strip: 75-110mm*0.15-22mm
Seamless and welded tubes also availabla per request

 

 

  Products show:

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Packaging & Shipping

 

Packaging:Products are generally supplied in standard cardboard boxes, pallets, wooden boxes. Special packaging requirements can also be accommodated. (also depend on the customers' requirements)

 

Shipping: We cooperation with many  logistics company,We can provide express, sea transportation, air transportation, and rail    way transportation based on customers' requirement.

 

 

Our Services

 

1)     We can provide a free sample for testing, If we have a sample in stock.

2)     Customized lable, packing, OEM service

3)     Mill test certificate  will be provided after production, If it is necessary.

4)     Good packing methods to keep goods no damage during delivery

5)     We are cooperation with many famous forwarder, will try our best to choose the safty, convenience, quick, and cheap mode of transportation for our customers.

 

 

 

Company Information

 

Capacity and Main markets. Our company has more than 20 years of experience in alloy products. The company covers 10000m2.The annual output reaches 5000 tons. The products apply to chemical industry, metallurgy mechanism, glass industry, ceramic industry, home appliance area widely. In china, we mainly do business with army industry, and for worldwide, our selling net-work has expanded to Russia, Ukraine, Germany, Iran, India, Itlay, America etc.

 

Quality AssuranceAccording to international standard, we introduce new techniques and new processes, so we can keep improving product quality. There are strict processes and quality manages to make sure the products keep updated, and be well received by users.

 

Equipment. Our major equipment, vacuum induction furnace, intermediate frequency induction furnace, electroslag furnace, skanthal A1 bath furnace, wiredrawing units, heat treatment production line and soon. Test equipment: straight reflection spectrograph , spectrometer , chemical  analyse  lab , machinery  properties lab (omnipotent test machine,hardness test machine inside), also metallography laboratory, ultrasonic harmless test,etc. 

 

 

FAQ

 

Service:

How can I contact with your company?

Our sales team is ready to serve you via Email, Telephone , Fax  or Skype You can reach us by below contact information:

Skype:wisdomalloy-sale01
Tel:+86-21-61395047
Fax:+86-21-61395049

What is your working time?
Monday-Friday : 8.0am-6.0pm (Beijing time, GMT+08.00)
We have public holiday during May.1-3, Oct.1-7 and our Chinese New Year holiday . For detail, please see our update holiday notice. During these period, if you have a demand, Please send me an  email.

Do you provide free samples?
Yes, we can provide a free sample for testing, If we have sample in stock, The quantity based on the material type, The buyer should bear all the shipping costs.
What is your payment terms?
We accept 100% TT ( Telegraphic Transfer) in advance for small orders( value under USD 2000). For some big orders, we can accept 30% deposit, 70% balance before shipment. For very small orders , we can accept Western union payment. We are doing the best to match your demand.



 

 

 

 

 


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