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Tungsten powder

Equivalent

Grade analogue W. Nr. Aisi Uns En Order
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Technical characteristics

Tungsten is the 74th element of Mendeleev’s system. It is a hard refractory metal of grey color that is designated as W. It is mined from ore concentrate. It possesses a density f 19.25g/cm3, melting point is 3422 °C, boiling temperature is 5500 °C.

Physical characteristics of W

Description Identification
Atomic (molal) weight mole/h 183.84
Oxidation rate 6, 5, 4, 3, 2, 0
Density [g/cm3]

19.25
Melting point 3422°С
Melting heat kJ/mole 191
Heat conductivity K [V/m*K] 162.8
Evaporation heat kJ/mole 4482

Tungsten powder is a hard highly-dispersed mass with a high refractory quality and hardness. It is widely used for manufacture of compacted metal as a basis for baling of heat-resistant alloys by method of powder metallurgy. At first, there are obtained billets that are the blankets for electrodes, sheets, wire, and bars.

Grades

The main grades are WP and PWW (highly-active tungsten powder), PWN (low-active tungsten powder), PWT (commercial powder). Manufacture of these grades is specified by technical conditions 48−19−72−92. Standard diameter of PWN grains constitutes 3.5−6 µm, PWT — 3.5−6 µm, PWW — 0.8−1.7 µm. But in some cases (not higher than 40%), size of PWN grains can be more than 4 µm.

Application

Refractory quality and hardness of tungsten allow suing it in manufacture of high-speed engineering steels, heat-resistant, wear-resistant, super-hard alloys, electric lightning equipment, welding electrodes. Tungsten powder is the main component of non-consumable electrodes for welding, high-speed engineering steels, wear and heat resistant alloys (stellite). Carbide WC is a basis of tungsten-cobalt hard alloy of grade WK.

Name Grade Feed stock
Highly-active tungsten powder PWW Ammonia paratungstate of high frequency or tungsten anhydrite of ammonia paratungstate, A-grade
Low-active tungsten powder PWN Low-molybdenum ammonia paratungstate or anhydrite of ammonia paratungstate, A-grade
Commercial tungsten powder PWT Ammonia paratungstate or anhydrite of ammonia paratungstate, A-grade
Component PWW PWT PWN
Sulfur 0.004 0.004 0.004
Molybdenum 0.02 0.2 0.04
Carbon 0.003 0.003 0.003
Arsenic 0.003 0.03 0.005
Iron 0.006 0.02 0.008
Aluminium 0.001 0.002 0.001
Silicon 0.002 0.005 0.003
Calcium 0.002 0.005 0.005
Nickel

0.005

0.004

0.008

0.005

0.005

0.005

Phosphorus

0.005

0.004

0.008

0.005

0.005

0.005

Weight percent      
Tungsten the rest the rest the rest

Weight percent of tungsten is accompanying undefinable additives and metal-basis.

Tungsten powder, dispersion of which is characterized by Fisher sub sieve size, complies with the standards given below:

Grade Fisher diameter of grains, µm
PWN 3.5 — 6.0
PWW 0.8 — 1.7
PWT 3.5 — 6.0

Note

— content of grains of grade PWN with a size more than 4 µm cannot exceed 40%.

— apparent density of grades PWT, PWN must be in the range of 3.0−5.5 g/cm3.

— apparent density of PWW is not considered as a rejection sign.

Tungsten powder supplier

«Auremo» tungsten powder supplier offers to buy products by wholesale. A wide range of grades is presented in stock. They comply with GOST and International Standards of quality. Tungsten powder is always in stock. You can buy it for affordable tungsten powder price from supplier. Buy tungsten powder right now! Tungsten powder price is privileged for wholesale buyers.

Buy tungsten powder at a bargain price

A huge range of semi-fabricates can be delivered by wholesale for reasonable price from «Auremo» tungsten powder supplier. Tungsten powder price is formed according to technological details of production without including additional expenses. All products are certificated. When there is a need, products can pass through an additional checking. We have the shortest terms of supply. We are working with experienced managers who are always ready to answer all your questions. If you buy tungsten powder by wholesale, you will be given special discounts.

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