Alloy 32NKA (EP475 alloy)
It is used for vacuum junctions with glasses C38−1, C40−1; TKLR * 1,000,000 in the temperature range from -60 to +400 ºC no more than 3.5−4.5 [1 / ºC]
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Precision alloys |
With given TCLE |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Co, % |
Ni, % |
C, % |
S, % |
|---|
| GOST 10994-74 |
63.13–64.7 |
< 0.2 |
< 0.2 |
3.8–4.2 |
31.5–32.2 |
< 0.05 |
< 0.02 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 20 |
145 |
4–4.5 |
48 |
480 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
d5, % |
Treatment |
|---|
| Tape |
GOST 2170-16 |
50 |
Transverse |
|
850–900 |
350–380 |
15–20 |
|
Magnetic properties
| Rolling |
$$H_c$$, $$A/m$$ |
$$\mu_{max}$$, $$MH/m$$ |
$$B_{500}$$, $$T$$ |
|---|
| Tape |
< 0.91 |
800–5500 |
10400–12500 |
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Tape |
GOST 2170-16 |
|
160–200 |
Casting and technological parameters
Limit operating modes
Analogues
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Co |
% |
Cobalt |
| Ni |
% |
Nickel |
| 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) |
| $$\varkappa$$ |
$$\frac{W}{m\cdot K}$$ |
Coefficient of thermal conductivity (the heat capacity 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 magnetic properties
| Parameter |
Units of measurement |
Description |
| $$H_c$$ |
$$A/m$$ |
Magnetic coercivity (not more) |
| $$\mu_{max}$$ |
$$MH/m$$ |
Magnetic permeability (not more) |
| $$B_{500}$$ |
$$T$$ |
Magnetic induction (not less) in a magnetic field while magnetic field strength is 500 A/m |
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 |