High Specific Gravity Tungsten Alloys

High Specific Gravity Tungsten Alloys

 

 

Besides the traditional high specific gravity alloy. Such as: W-Ni-Fe, W-Ni-Cu series, W-Ni-Cu-Fe-Co series high gravity alloy was created by our newly research.. It’s elongation, tenacity, and processing properties much better than the traditional ones; density 16.5~18.8g/ cm³, hardness HRC25~30 and Elongation/Break≥10%.

Silver Tungsten Alloy Parts

Silver Tungsten Alloy Parts

Silver Tungsten Alloy Parts, such as Plates, sheets and strips,rods can be welded with copper and chrome-copper alloys，and machined as required.
  
 

Tungsten Gold Plates, Bars and Rods

Tungsten Gold Plates, Bars and Rods

 

 

Specification of Gold Tungsten Produc

Brand and NO.	Chemical components  %			Physical properties
	Ag	Total Impurities ≤	W	Density (g/cm³) ≥	Hardness HB ≥	Resistivity (µΩ·cm) ≤	Conductivity IACS%≥	Bending Strength Mpa≥
AgW（30）	70±1.5	0.5	balance	11.75	75	2.3	75
AgW（40）	60±1.5	0.5	balance	12.40	85	2.6	66
AgW（50）	50±2.0	0.5	balance	13.15	105	3.0	57
AgW（55）	45±2.0	0.5	balance	13.55	115	3.2	54
AgW（60）	40±2.0	0.5	balance	14.00	125	3.4	51
AgW（65）	35±2.0	0.5	balance	14.50	135	3.6	48
AgW（70）	30±2.0	0.5	balance	14.90	150	3.8	45	657
AgW（75）	25±2.0	0.5	balance	15.40	165	4.2	41	686
AgW（80）	20±2.0	0.5	balance	16.10	180	4.6	37	726

Gold Bar Discovered Filled With Tungsten

 

Australian bullion dealer ABC Bullion is reporting that one of its suppliers has provided them photographic evidence of a tungsten filled 1 kilo gold bar,. The bar passed a hand-held xrf scan which showed 99.98% pure AU. The tungsten was only discovered when the bar was physically cut in half.
After numerous reports of 400oz tungsten filled bars being discovered in Hong Kong, this is the first documented and verified report with photographic evidence that has been made public, states Silver Doctors. ABC Bullion is a major player in the gold bar business and thus this report should be taken seriously.
Here's the reports from ABC:

Attached are photographs of a legitimate Metalor 1000gm Au bar that has been drilled out and filled with Tungsten (W).
This bar was purchased by staff of a scrap dealer in xxxxx, UK yesterday. The bar appeared to be perfect other than the fact that it was 2gms underweight. It was checked by hand-held xrf and showed 99.98% Au. Being Tungsten, it would not be ferro-magnetic. The bar was supplied with the original certificate.
The owner of the business that purchased the bar only became suspicious when he realized the weight discrepancy and had the bar cropped. He estimates between 30-40% of the weight of the bar to be Tungsten.
This is very worrying and reinforces the lengths that people are willing to go to profit from the current high metal prices. Please be careful.

The two halves of the bar.



 

Note, ABC is not insinuating that this tungsten discovery is part of some grand scheme. They are noting that it is very profitable to try and get away with slipping tungsten in the core of gold bars. At the same time, though, there have been rumors for a long-time that Fort Knox gold may be salted. Here's Silver Doctor on a Rob Kirby 2009 report on the manufacture of tungsten blanks and Fort Knox:

Now that we have confirmed documentation that 1 kilo gold bars have been drilled out and filled with tungsten, look for a rapid scramble to verify the AU contents of 400oz bars which reportedly have also been tainted with tungsten (the market is 'stuffed full' of gold plated tungsten 400oz bars according to Rob Kirby).
For those unfamiliar with the original reports that 60 metric tonnes of 400oz 'good delivery' bars were gutted and filled with tungsten, and swapped with US Treasury gold at Fort Knox in a highly sophisticated plan, an excerpt of his 2009 piece is included below:

The amount of "salted tungsten" gold bars in question was allegedly between 5,600 and 5,700 – 400 oz – good delivery bars [roughly 60 metric tonnes]. 

This was apparently all highly orchestrated by an extremely well financed criminal operation.
Within mere hours of this scam being identified – Chinese officials had many of the perpetrators in custody. 

And here's what the Chinese allegedly uncovered: 

Roughly 15 years ago – during the Clinton Administration [think Robert Rubin, Sir Alan Greenspan and Lawrence Summers] – between 1.3 and 1.5 million 400 oz tungsten blanks were allegedly manufactured by a very high-end, sophisticated refiner in the USA [more than 16 Thousand metric tonnes].  Subsequently, 640,000 of these tungsten blanks received their gold plating and WERE shipped to Ft. Knox and remain there to this day.  I know folks who have copies of the original shipping docs with dates and exact weights of "tungsten" bars shipped to Ft. Knox.
             
The balance of this 1.3 million – 1.5 million 400 oz tungsten cache was also plated and then allegedly "sold" into the international market. 

Apparently, the global market is literally "stuffed full of 400 oz salted bars".
Makes one wonder if the Indians were smart enough to assay their 200 tonne haul from the IMF?

Bottom line: Ron Paul has a very good reason to want an audit of Fort Knox gold. Let's see if there is any validity to these rumors.

by Robert Wenzel
Economic Policy Journal

Recently by Robert Wenzel: The Ford Foundation and the CIA

Reprinted with permission from Economic Policy Journal.

March 26, 2012

©2012 Economic Policy Journal

Tungsten Bars

                                  Tungsten Bar

Description

Grade: W-1 W-2 W-3 W-4  W-1
Purity: W>99.95%

Density：≥17.0g /cm3
Appearance: Shine with grey or dark grey metallic luster.
Application:

1. Tungsten bar is mainly used to found ingredient of material, cutter and heads, tungsten wire for lights instruments and conductor of heat, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistant steel.

2. Tungsten bar is also used to make guns, artillery rockets, satellite airplane and ship.

3. Purified tungsten bar is used as a material for making special steels and tungsten wire, or used in electric contact points. Tungsten bar with impurities is used to procedure bulb filaments or electron tube filaments, which are guaranteed to have remarkable resistance to high temperature.

The impurity content accords with GB3459-82 

 

Description	Code	W	Density	Size	Applications
		(%)	g/cm3
Tungsten bars	TW-2	99.95	17.5	12 x 12 x 400	W rods and contacts
Tungsten bars 4r drawing wire	TW-2.1	99		14 x 14 x 450	Doped W bars suitable for drawing wire and for stirring rods in the smelting of rare earth metals
	TWA1			16 x 16 x 600
Tungsten bars 4 steel smelting	TW-1	99.95			High purity W bars suitable for steel smelting W bars of an industrial grade suitable for steel smelting
	TW-4	99.9
Tungsten blanks	BPW	99.95	18	(20-50) x (20-300) x (20-600)	Suitable for rolling tungsten plates

Pure Tungsten Boat, Tungsten Metal Boat

Pure Tungsten Boat, Tungsten Metal Boat

Chinatungsten offers different kinds of specifications and shapes of tungstenspecial part can be produced according to the demand of customers: tungsten sheet , tungsten rod, tungsten crucible, tungsten targets, tungsten plate and tungsten boat

Tungsten Boat
1.Applications:
Metallizing,Electron-beam Spraying as well as sinteting annealing in 
reducing atmosphere in electronics, military and light industries

2. Specifications：

Type	Thk	Long	Wide	L1	Deep
M-310	0.3	100	10	60	1.5-2.0
M-215	0.2	100	15	60	1.5-2.0
M-315	0.3	100	15	60	1.5-2.0
M-515	0.5	100	15	60	1.5-2.0
M-218	0.2	100	8	60	1.5-2.0
M-312	0.3	100	12	60	1.5-2.0
M-251	0.2	50	10	25	1.5-2.0
M-353	0.3	50	13	25	1.5-2.0
M-220	0.2	102	15	40	5.0
M-223	0.2	100	23	Dia15	1.5-2.0

Applications of tungsten metal boat:
Tubes / Boats for Sintering of Capacitors, Furnace parts, Semiconductor Base Plates,, Emission Cathodes for Electron Beam Evaporation, Cathodes and Anodes for Ion Implantation,  Crucibles,  Components for Electron Tubes, Heating Elements, X-ray Radiation Shielding, Sputtering Targets, Electrodes,Targets for X-ray Diagnostics,

Tungsten Cooper Heat Sink

Tungsten Cooper Heat Sink

Tungsten copper alloy is consisting of tungsten and copper, copper content of 10% to 50%. made of powder metallurgy alloy. It has good electrical and thermal conductivity, good high temperature strength and a certain plasticity. At high temperatures, such as above 3000 ℃. The copper alloy is liquid evaporates,absorbs heat, reducing the surface temperature. Therefore, these materials are also known as metallic sweat material. Tungsten copper alloy have a wide purpose, mainly used to manufacture anti-arc ablation of high-voltage electrical switch contacts and the rocket nozzle throat insert, rudder and other high temperature components, and also used for EDM electrode, high temperature moldsand other thermal conductivity and high temperature performance required to usethe occasion. Fine selection of tungsten copper tungsten, copper powder, refine dart soak sintering process, can withstand the high stress of nearly 2,000 high moderate, high melting point, high hardness, anti-burning and good anti-adhesion, electrical erosion product surface finish high, high precision, low loss. Tungsten copper is widely used as high-pressure, super-hydraulicswitch and circuit breaker contact, protection ring for electric upsetting anvil block of material, conductive Tsui automatic submerged arc welding, plasma cutting nozzles, welding machines, welding head for welding , roll welding wheels,electrode and the point of sealing gas Mao spark electrodes, spot welding, butt welding materials.

 

 Characteristics of tungsten copper

1. Resistance welding electrode: the advantages combinating tungsten and copper, high temperature resistance, arc erosion, high strength, heavy, electrical conductivity, thermal conductivity, and easily machining, and has features such astranspiration cooling,with the high hardness of tungsten, high melting point,anti-adhesion characteristics, often applied for resistance projection welding, butt welding electrodes which has a certain resistance to abrasion,high temperature

2. EDM Electrode: tungsten steel and high temperature super-hard alloy made for moulds by electrolysis, the common electrode wear, slow, and the high powertungsten and copper corrosion rate, low attrition rate.  The precise shape of the electrode and excellent processing performance, could ensure the accuracy of the workpiece increased greatly.

3. High-voltage discharge electrodes: Vacuum discharge tube working, contacts material will rise to thousand degrees Celsius temperature in a second time. The W-Cu high ablation resistance, high toughness, good electrical conductivity, thermal conductivity and stability provide the necessary conditions for the discharge tube.

4 Electronic packaging materials: low-expansion characteristics of both the tungsten, but also has high thermal conductivity properties of copper, its thermal expansion coefficient and electrical and thermal conductivity by adjusting the material composition and to change.

 

Application of tungsten copper

Tungsten copper alloy combines the advantages of tungsten and copper, which the high melting point of tungsten (tungsten melting point of 3410 ℃, coppermelting point 1080 ℃), Highdensity (density of tungsten 19.34g/cm, copper density 8.89/cm3); excellent thermal conductivity properties of copper, tungsten copper alloy (composition generally ranges WCu7 ~ WCu50) uniform micro structure,high temperature, high strength, resistance to arc erosion, density; conductivity,moderate thermal conductivity, high temperature materials are widely used in military, high-voltage switch with electrical alloy, EDM electrodes,microelectronics materials, parts and components are widely used as aerospace, aviation, electronic, electric power, metallurgy, machinery, sports equipment and other industries.

Main Grades and Properties

	RWM Group B	Nominal composition % Weight	Rockwell Hardness	Electrical Conductivity %ACS	Ultimate Tensile Strength PSI	Cross Breaking Strength PSI	Density GMS/CC	Thermal Exp in/in cx10(6) at 20°c	Thermal Conductivity W/CM 20°c -400°c
CuW55	-	45 copper	79B	55	63000	110000	12.6	11.8	2.4
		55 tungsten
CuW68	-	32 copper	88B	52	75000	130000	13.93	10.9	2.1
		68 tungsten
CuW70	Class 10	30 copper	90B	50	85000	140000	14.18	10.77	2.01
		70 tungsten
CuW75	Class 11	25 copper	94B	48	90000	150000	14.7	10.22	1.89
		75 tungsten
CuW78		22 copper	96B	46	94000	160000	15.12	9.3	1.84
		78 tungsten
CuW80	Class 12	20 copper	98B	44	96000	170000	15.58	9.2	1.82
		80 tungsten
CuW85	-	15 copper	102B	36	75000	170000	16.19	7.97	1.75
		85 tungsten
CuW90	-	10 copper	106B	28	70000	150000	17.05	6.49	1.47
		90 tungsten

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