Precision Alloy 31NK
Used for soldering with soft glass C72−4, for bonding with ceramics and mica; TKLR * 1,000,000 in the temperature range from -70 to +450 ºC no more than 6 — 9 [1 / ºC]
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Precision alloys |
With given TCLE |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Co, % |
Ni, % |
ET, % |
|---|
| GOST 10994-74 |
47.21–49.8 |
0.1–0.3 |
0.1–0.4 |
19.5–20.5 |
30.5–31.5 |
< 0.09 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 20 |
142 |
8200 |
430 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
d5, % |
Treatment |
|---|
| Tape |
GOST 10994-74 |
60 |
Transverse |
|
850–920 |
380–440 |
15–20 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Tape |
GOST 10994-74 |
|
200–220 |
Casting and technological parameters
Limit operating modes
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| ET |
% |
Total other items |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Co |
% |
Cobalt |
| Ni |
% |
Nickel |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$E\cdot 10^{9}$$ |
$$MPa$$ |
Elastic modulus |
| $$\rho$$ |
$$\frac{kg}{m^3}$$ |
The density of the material |
| $$R\cdot 10^{-6}$$ |
$$\Omega\cdot m$$ |
Electrical resistivity |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| d5 |
% |
Elongation at break |
| $$\sigma_{Y}$$ |
$$MPa$$ |
Yield strength |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
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 |