VM
This brand of tungsten with thorium and silica-additives to impart additional characteristics such as strength after annealing, increase the temperature range of primary recrystallization.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Refractory metals, carbide |
Tungsten |
Chemical composition
| Standard |
Oxide Th, % |
W, % |
Примеси, % |
|---|
| GOST 19671-91 |
0.17–0.25 |
> 99.7 |
0.05 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$\rho$$, $$\frac{kg}{m^3}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 20 |
19300 |
55 |
Brinell hardness number
Casting and technological parameters
| melting point, °C |
Boiling temperature, °C |
|---|
| 3380 |
5555 |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Oxide Th |
% |
Thorium Oxide |
| Примеси |
% |
Impurities |
| W |
% |
Tungsten |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$\rho$$ |
$$\frac{kg}{m^3}$$ |
The density of the material |
| $$R\cdot 10^{-6}$$ |
$$\Omega\cdot m$$ |
Electrical resistivity |
Description of the casting and technological parameters
| Parameter |
Units of measurement |
Description |
| melting point |
°C |
The temperature at which solid crystalline body makes the transition to the liquid state and Vice versa |
| Boiling temperature |
°C |
The boiling point, boiling point is the temperature at which the liquid under constant pressure boils. |