Alloy 32NKA (EP475 alloy)

No foreign analogues

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

melting point, °C
1440

Limit operating modes

Standard Температура, °C
GOST 10994-74 < 500

Analogues

Russia
Сплав 32НК

Standards

Standard Description
GOST 10994-74

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