Iron-cobalt-nickel alloy precision 24NK

No foreign analogues

It is intended for connection with ceramics like «22XC» and «polycor», leucosapphire, etc. high-temperature solders with a melting point of 800−1000 ° C

Classification

Country Section Category
CIS, Russia, Ukraine Heat resistant steels and alloys Heat resistant alloys

Chemical composition

Standard Fe, % Si, % Mn, % Co, % Ni, % C, %
GOST 10994-74 45.8–48.5 < 0.3 < 0.35 27.5–28.5 24–25 < 0.05

Information on suppliers

Physical characteristics

Temperature, °C E\cdot 10^{9}, MPa \alpha\cdot 10^{6}, K^{-1} \rho, \frac{kg}{m^3} R\cdot 10^{-6}, \Omega\cdot m
20 144 5.5–8 8400 500

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{Y}, MPa d5, % Treatment
Tape GOST 14086-68 <2.0 Transverse raw, cold rolling, thin, Transverse 480–500 270–290 23

Casting and technological parameters

melting point, °C
1450

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
no limits not sensitive loathsome

Limit operating modes

Standard Температура, °C
GOST 10994-74 < 420

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

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
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

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