Tungsten Powder

01

Description

TUNGSTEN POWDER is used for making

--sintered and deformed semi-finished products and other articles (bars, sheets, rods, electrodes, wire, crucibles, sputtering targets, molybdenum alloy products);

--electrical contacts (mixed with copper);

--composites with copper, nickel and other metals (pseudo-alloys, heavy alloys);

--directed action pyrotechnics;

--filler of compounds for piezoelectric transducers, etc.

02

specifications

Typical content of tungsten in tungsten powders is 99.986-99.987%.

Mass fraction of W is calculated by deducting the sum of all metal impurities controlled by inductively coupled plasma mass spectrometry (ICP-MS) from 100%. Gas-forming impurities such as C, O, N, H, S, F, and Cl are not included in the calculation of the tungsten fraction.

The average particle size of the powder or Fischer sub sieve size (F.s.s.s) is as below:

Powder PW1 – 0.8 - 1.7 microns;

Powder PW2 – 3.8 - 6.0 microns.

The content of particles over 4 microns in PW2 is 40% (by volume) max.

The bulk density of PW2 powder is 3.0 - 5.5 g/ccm.

03

advantages

—

high chemical purity of products in terms of metal impurities and harmful intersitial impurities, which ensures better characteristics of rolled and other products;

—

high compressibility, allowing to produce durable small and large-sized semi-finished products by pressing in rigid dies or by cold isostatic pressing without a plasticizer;

—

possibility to select powders with different particle sizes and specific crystal morphologies to meet individual customer's requirements.

04

Product names

Examples of product names are PW1 and PW2.

You can contact our sales managers for more details at:

export_polema@metholding.com,

tel.: +7(4872)25-06-76.

05

chemical composition

Name	W	*Impurities,* *ppm, max*
Name	W	Na	Al	Si	K	Ca	V	Fe	Ni	As	Mo	Cd	Sb	C	S	*Ti, Sn, Pb, Bi each*
PW1	base	100	10	20	40	20	7	60	50	30	200	2	4	30	40	1
PW2	base	150	10	30	50	50	7	80	50	50	400	2	4	30	40	1

06

miscellaneous

*Parameter*	*Numbers for powders and their mixes*
*Parameter*	*PW1*	*PW2*	*Mix of 30% PW1 and 70% PW2*
Green strength at Р=300 MPa, g/ccm, min	10	11.5	11.5
Green strength at Р=700 MPa, g/ccm, min	11.5	13.5	13.2
Green bending strength, MPa, min	5	6	5

07

Application areas