April 25, 2014 tungsten reference price of all varieties

April 25, 2014 tungsten reference price of all varieties :

Variety name Price Unit
APT 16.80-17.00 Yuan / ton
Ferrotungsten 18.00-18.30 Yuan / ton
Sodium tungstate 13.20-13.50 Yuan / ton
Tungsten 460-480 Yuan / kg
Electrode polished rod 510-520 Yuan / kg
Native tungsten carbide powder 265-267 Yuan / kg



Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

The importance of the development of tungsten-copper composite material

W-Cu composite material is a high melting point , high conductivity and high density of tungsten and a low coefficient of expansion , high thermal conductivity copper composition , both the advantages of both can , having high thermal conductivity properties such as low expansion coefficient , good high temperature strength and arc erosion resistant properties. As early as in the 1930s , tungsten -copper composite material due to its good compressive strength and resistance to electrical ablation performance, high-voltage electrical switches and other industrial sectors has been widely applied . Into the sixties, tungsten -copper composite material gradually gained in the field of resistance welding electrodes , aerospace and high-temperature parts. Since then, with gradually improved preparation technology , electronic packaging and in the nineties as a heat sink material began in the field of LSI and high-power electronic devices such as access to a wide range of applications . Into the 21st century, tungsten -copper composite material is used as cover material HEAT medicine , materials and target missile nozzle caused concern in the military and high-tech fields .

Now , tungsten -copper composite material due to its good electrical conductivity , thermal conductivity and excellent thermal stability , has become a high-power microwave devices and ultra large scale integrated circuit substrates , embedded blocks , essential key material connections and cooling components , etc. its high thermal conductivity , high thermal stability and good formability near net sizes , can improve the use of power microelectronic devices , is conducive to miniaturization of devices and sophisticated development. Low thermal expansion coefficient and the thermal expansion coefficient of tungsten-copper composite material adjustability , enabling connection to match its semiconductor materials and microelectronic devices with silicon , gallium arsenide and other useful ceramic materials , to avoid thermal fatigue damage caused by thermal stress broaden the tungsten -copper composite material in the field of microelectronics applications.

Tungsten -copper composite material due to its high electrical conductivity, thermal conductivity, excellent arc resistance , anti-friction and thermal stability , have already obtained important applications in rail guns , rockets and missile nozzle throat rudder and other high-temperature gas fields . In recent years , tungsten -copper composite material is gradually being used as cover material HEAT drug , its high density , high sound speed and good mechanical properties , help to improve HEAT Sunder power. Europe and other developed countries, studies show that, compared with the pure copper HEAT drug cover , tungsten -copper composite material cover the drug in the triple bombing high caliber of conditions, the armor depth can be increased by 30 %. With the continuous development of high-performance tungsten-copper composite materials preparation technology and applied research , and applications in the military industry will be more broad.

Tungsten-copper composite powder metallurgy materials is an important one of the widely used method for preparing a " Infiltration law ." The method is a mixture of tungsten powder, tungsten powder and a small amount of copper powder or pressed into the blank , by the pre- firing temperature for preparing a porous tungsten skeleton, and then the molten metallic copper and a capillary force to flow along the gap gradually tungsten particles fill skeleton obtained tungsten -copper composite material. Preparation of material dissolved infiltration with high density, good sintering properties , electrical conductivity, thermal conductivity , etc. ideal .

Due to the large gap between the melting point of tungsten and copper and immiscible , were prepared by powder metallurgy method of tungsten-copper composite material is often not high density , usually resulting in a conductive material , inadequate thermal and mechanical properties. In order to continue to meet the new requirements proposed industrial development , preparation techniques tungsten-copper composite task facing major reforms . In recent years , highly dispersed , the rapid development of nano- powder preparation techniques , new pressing and sintering technology , the performance of tungsten-copper composite gained further improved, effective broaden its application in high-tech fields.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Tungsten scrap market price difference is widening, cheap goods will go low

Today, the mainstream price of tungsten scrap market stabilize, ample supply , distribution of funds is tight . Because of funding constraints, the cash redemption price is down, the market price difference is widening, however, reluctant to hold stocks cheap goods to go , spot market transactions are not very active, expected short-term risk of tungsten steel scrap prices are still slightly downward .

It is understood by the price of cobalt and tungsten mine while lower impact materials , scrap tungsten drill mainstream has dropped 190 yuan / kg, and even some of the cash transaction price pressure as low as 185,186 yuan / kg, sold more than a lower price , but less volume .


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Ample supply of tungsten market turnover continued to light

Tungsten market : the market with ample supply of raw materials and scrap tungsten inquiry there , but the turnover has continued to light , tungsten, iron market demand is low, the downstream business procurement initiative is low, less market inquiry , coupled with the raw material of tungsten concentrate market downward , tungsten iron spot transactions also showed a stalemate , and the market is slightly weaker . Mainly because of the buyer to take advantage of weaker market outlook and weighed on prices ; seller tungsten market is still holding on long-term expectations and will ship is not strong. Both sides continued stalemate on the issue price , in the absence of external force , expected short-term dilemma is difficult to break the stalemate .

Molybdenum market : External molybdenum prices fell slightly , but the business mentality better, post-market is still strong side . Molybdenum domestic goods market continued to maintain silence, less early trading atmosphere . Foreign businesses not cheap , price stability, hold stocks wait and see. Admission is about to move steel , molybdenum market or expected short-term maintenance of stability persist run .

Read more: Ample supply of tungsten market turnover continued to light

Ferrotungsten demand is low, the market traded difficulties

Ferrotungsten sluggish market demand , the downstream business procurement initiative is low, less market inquiry , coupled with the raw material of tungsten concentrate market down, tungsten, iron spot transactions also showed a stalemate , and the market is slightly weaker . However, due to cost and other support , most businesses offer steady, only a small part of the business cash turnover slightly lower.

It is understood that at present , 70 ferrotungsten denominated promissory offer more concentrated in the 180,000 yuan / ton, cash transactions at 178,000 yuan / ton in the vicinity , but the market is not very abundant funds , cash transactions can be as low as 176,000 yuan part / ton .

Currently the market because of the tungsten market trend is not clear , tungsten, iron merchants more worried about the market outlook , some manufacturers even prudent to temporarily offer , watching the market , analyze expected shortly ferrotungsten market transactions or continuing weak market or steady weakening .


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

 

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