Tungsten Dart News & Info

Tungsten Bar Surface State

Details: Category: Tungsten Information; Published on Monday, 29 September 2014 11:01

The appearance of tungsten bar, tungsten rod, turns to be metallically gray or dark gray. Hygroscopy is not allowed on the appearance of W1 ,W2, and W3 tungsten bar, tungsten rod.

Any oxidation, contamination, and severe excessive fusion, bubbling, delamination, or crack is not allowed for product W1. Camber should be no more than 10mm. Any excessive fusion, bubble, delamination, crack, surface bulky crystallization or severe oxidation &contamination are not allowed for products W2 and W3. The length of the spalls should not be more than 8mm, width no more than 3mm, depth no more than 1mm; The diameter of mechanical pitting should not be more than 1mm, depth no more than 0.5mm; Camber should be no more than 4mm. Any oxidation or contamination is not allowed for product w4.

Tungsten has about the same electrical conductivity and resistivity, coefficient of thermal expansion, and about the same resistance to corrosion by mineral acids as molybdenum. Tungsten is high strength at temperatures above 2,000Â°F, but because the melting point is higher, it retains significant strength at higher temperatures. The elastic modulus for tungsten is about 25% higher than that of molybdenum, and its density is almost twice that of molybdenum. All commercial unalloyed tungsten is produced by powder-metallurgy methods; it is available as rod, wire, plate, sheet, and some forged shapes. For some special applications, vacuum-arc-melted tungsten can be produced, but it is expensive and limited to relatively small sections.

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Tungsten Bar Physical Properties

Details: Category: Tungsten Information; Published on Monday, 29 September 2014 10:27

Tungsten bar has the highest melting point of any metal of approximately 3422 degrees Celsius, but with the lowest vapor pressure. Especially, tungsten bar has very high densitys, high temperature resistance, non-toxic, etc .

Density:≥19.20 g/cm³

Purity:≥99.95%

Surface condition:black-faced ,polished sruface

Appearance of tungsten bar: The appearance of tungsten bar turns to be metallically gray or dark gray. Hygroscopy is not allowed on the appearance of W1 ,W2, and W3 tungsten bars.

Tungsten bars stock are manufactured from high purity tungsten powder. Because of the special properties of tungsten, these rods and bars have many applications such as welding electrodes and electrical contacts.

PHYSICAL PROPERTIES OF TUNGSTEN BAR
Density	19.17 g/cm3
Melting Point	3410oC
Electrical Conductivity	31% IACS

tungsten bar physical properties

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Tungsten Bar Types

Details: Category: Tungsten Information; Published on Monday, 29 September 2014 10:15

Tungsten bar includes tungsten rod, tungsten steel bar, tungsten rod, tungsten sintered bars and more, which is mainly used to found ingredient of material, cutter and heads, tungsten wire for lights instruments, electric contact points and conductor of heat, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistant steel.

Tungsten bar with impurities is used to produce bulb filaments or electron tube filaments, which are guaranteed to have remarkable resistance to high temperature. Tungsten is a naturally occurring metal mined from the earth. In this raw form, tungsten can be very brittle. In general, tungsten bar can be divided into three types.

Type	Diameter1 (mm)	Length1 (mm)	Diameter2(mm)	Length2 (mm)
Sintering Bar	12×12	400	15×15	550
Forged Bar	12×12	400	15×15	550
Ground Bar	12×12	400	15×15	550

tungsten bar types

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Tungsten Bar Grades

Details: Category: Tungsten Information; Published on Monday, 29 September 2014 10:08

Tungsten bar grades can be dicided by the content the purity of tungsten.

GRADE		W1	W2	W3	W4
Purity (%) min.	W	99.95	99.95	99.70	99.00
IMPURITY (ppm) max.	Fe	50	50	100	500
	Ni	30	30	50	3000
	Al	20	20	50	50
	Si	30	30	100	100
	Ca	30	30	50	50
	Mg	20	20	50	100
	Mo	100	100	2000	2000
	P	10	10	20	50
	C	50	80	100	100
	O	30	30	50	80
	N	30	30	---	---
	Pb	1	1	1	10
	Bi	1	1	1	10
	Sn	3	3	3	10
	Sb	10	10	10	10
	As	20	20	20	20
Application		Tungsten-base alloy Material	Processing Material	Processing Material	Alloy Addition

tungsten bar grade

Grades		WB-1	WB-2	WB-3	WB-4	Typical-1	Typical-2
Impurities %,max	Pb	--	--	--	0.001	--	0.001
	Bi	--	--	--	0.001	--	0.001
	Sn	--	--	--	0.001	--	0.001
	As	--	--	--	0.002	--	0.001
	Fe	0.005	0.005	0.010	0.05	0.005	0.020
	Ni	0.003	0.003	0.005	0.30	0.002	0.005
	Al	0.002	0.002	0.005	0.005	0.001	0.003
	Si	0.003	0.003	0.010	0.010	0.0015	0.002
	Ca	0.003	0.003	0.005	0.005	0.002	0.005
	Mg	0.002	0.002	0.005	0.010	0.001	0.001
	Mo	0.010	0.010	0.20	0.20	0.003	0.050
	P	0.001	0.001	0.002	0.005	0.001	0.001
	C	0.005	0.008	0.010	0.010	0.003	0.003
	O	0.003	0.003	0.005	0.008	0.003	0.008
	N	0.003	0.003	--	--	0.003	--
	Sb	--	--	--	0.001	--	0.0005
Uses		Material for making tungsten alloy	For Processing material	For processing material	For processing material	For processing material	For alloy additive

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Tungsten Flipping Weight

Details: Category: Tungsten Information; Published on Monday, 29 September 2014 08:45

Tungsten flipping weight have smooth curved edges with shape of a cross between a bullet and a little ball, so that the line can't snap on high impact hook sets. Flipping weights feature for insert-free technology, so that you don't have to use toothpicks.

Tungsten flipping weight are very sensitive, you can feel even little tick of the bottom and you can even feel the bottom soft or hard .The weights come in sliding and screw in versions as well.

Tungsten flipping weight are perfect for any type of Texas or Carolina rig application. Tungsten flipping weight are great for punching through heavy cover and are available in both natural and black colors.

Tungsetn-flippin-weight

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99.98% Tungsten Bar

Details: Category: Tungsten Information; Published on Sunday, 28 September 2014 14:10

Purity: W≥99.98%

Dia. :17.5mm

Length :720-750mm

Application: Mainly used to found ingredient of material, cutter and heads, conductor of heat,as the material and additive, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistent steel and electrode, mainly used to guns, artillery,rockets, satellite,airplane and ship.

Chemical Composition (%)

Main Comp.W≥99.98
Other Content≤	Fe	0.0026	Al	0.0006	Si	0.001
	Ca	0.001	Ni	0.0009	O	0.0018
	Cu	0.0005	N	0.0015	Pb	0.0001
	Sn	0.0001	Sb	0.001	As	0.001
	Cd	0.0001	Mg	0.0006	C	0.002
	Bi	0.0001	Mo	0.003	-	-

99.98 tungsten-bar

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99.97% Tungsten Bar

Details: Category: Tungsten Information; Published on Sunday, 28 September 2014 14:05

Grade:W-1

Purity: W≥99.97%

Appearance: Shine with grey or dark grey metallic luster.

Application: Mainly used to found ingredient of material, cutter and heads, conductor of heat,as the material and additive, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistent steel and electrode, mainly used to guns, artillery,rockets, satellite,airplane and ship.

High purity tungsten bar specification (%)

Main Comp.W≥99.97
Al	0.001	Si	0.0017	Mg	0.0006
Ni	0.001	O	0.002	C	0.002
N	0.0015	Pb	0.0001	Bi	0.0001
Sb	0.001	As	0.001	Mo	0.08

99.97 tungsten-bar

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99.96% Tungsten Bar

Details: Category: Tungsten Information; Published on Sunday, 28 September 2014 13:59

Grade:W-1

Purity: W≥99.96%

Appearance: Shine with grey or dark grey metallic luster.

Application: Mainly used to found ingredient of material, cutter and heads, conductor of heat,as the material and additive, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistent steel and electrode, mainly used to guns, artillery,rockets, satellite,airplane and ship.

High purity tungsten bar specification (%)

Main Comp.W≥99.96
Other Content≤	Fe	0.0045	Al	0.0005	Si	0.0015	Mg	0.0006
	Ca	0.001	Ni	0.002	O	0.0025	C	0.002
	P	0.0008	N	0.002	Pb	0.0001	Bi	0.0001
	Sn	0.0001	Sb	0.001	As	0.001	Mo	0.01

99.96 tungsten-bar

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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99.95% Tungsten Bar

Details: Category: Tungsten Information; Published on Sunday, 28 September 2014 13:52

Grade:W-1

Purity: W≥99.95%

Appearance: Shine with grey or dark grey metallic luster.

Application: Mainly used to found ingredient of material, cutter and heads, conductor of heat,as the material and additive, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistent steel and electrode, mainly used to guns, artillery,rockets, satellite,airplane and ship.

High purity tungsten bar specification (%)

Main Comp.W≥99.95
Other Content≤	Fe	0.005	Al	0.002	Si	0.003	Mg	0.002
	Ca	0.003	Ni	0.003	O	0.003	C	0.005
	P	0.001	N	0.003	Pb	0.0001	Bi	0.0001
	Sn	0.0001	Sb	0.001	As	0.002	Mo	0.01

99.95 tungsten-bar

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Bulk Tungsten Bullet Weight

Details: Category: Tungsten Information; Published on Sunday, 28 September 2014 09:18

Bulk tungsten bullet weight feature for 95% tungsten compositions and premium polished finishes helping keep your line from fraying or breaking.

Far more compact and streamlined than their lead, brass or stainless steel counterparts, the bullet weights have a much higher density and hardness thanks to their 95% tungsten composition. The added hardness also translates into increased sensitivity, and allows you to distinguish between every rock, stick and pebble your weight comes in contact with. The bulk tungsten bullet weight are now available in multiple colors to create more realistic presentations.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
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