Cr20Ni80-H
for heaters with a maximum working temperature of 1200 degrees C industrial furnaces and various electrical heating devices
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Precision alloys |
With high electrical resistance |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ti, % |
Ni, % |
Zr, % |
Al, % |
P, % |
C, % |
S, % |
|---|
| GOST 10994-74 |
< 1 |
1–1.5 |
< 0.6 |
20–23 |
< 0.2 |
72.905–78.8 |
0.2–0.5 |
< 0.2 |
< 0.02 |
< 0.06 |
< 0.015 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
$$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 20 |
217 |
|
8400 |
|
1.11 |
| 100 |
|
18 |
|
0.44 |
|
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\epsilon_L$$, % |
Treatment |
|---|
| Tape |
|
|
|
|
834 |
20 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
|
|
|
140–150 |
Casting and technological parameters
Technological Properties
| Weldability |
|---|
| Difficult to weld |
Analogues
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ti |
% |
Titan |
| Ni |
% |
Nickel |
| Zr |
% |
Zirconium |
| Al |
% |
Aluminium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$E\cdot 10^{9}$$ |
$$MPa$$ |
Elastic modulus |
| $$\alpha\cdot 10^{6}$$ |
$$K^{-1}$$ |
Coefficient of thermal (linear) expansion (range 20°C–T) |
| $$\rho$$ |
$$\frac{kg}{m^3}$$ |
The density of the material |
| $$c\cdot 10^{-3}$$ |
$$\frac{J}{kg\cdot K}$$ |
The specific heat of the material (range 20°C–T) |
| $$R\cdot 10^{-6}$$ |
$$\Omega\cdot m$$ |
Electrical resistivity |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\epsilon_L$$ |
% |
Elongation at break (longitudinal) |
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 |
Designation of types of weldability
| Parameter |
Units of measurement |
Description |
| no limits |
|
Welding is performed without heating and without subsequent heat treatment |
| Boundedly welded |
|
Welding is possible with heating up to 100–120 °C and subsequent heat treatment |
| Difficult to weld |
|
For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing |
| Not applicable for welded structures |
|
|