Magnetically soft precision alloy 31NH3G2

No foreign analogues

Used in the electric vacuum industry

Classification

Country Section Category
CIS, Russia, Ukraine Precision alloys Soft Magnetic Precision Alloys

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % ET, %
GOST 10994-74 61.31–64.4 0.3–0.8 1.5–2 2.8–3.8 31–32 < 0.09

Information on suppliers

Physical characteristics

Temperature, °C $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ Cp, Дж/кг·К
20 15.6 8040 86 452

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
Tape GOST 10994-74 50 Transverse 200–210 130–140 15–20

Magnetic properties

Rolling $$\mu_{max}$$, $$MH/m$$
Tape < 11000

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Tape GOST 10994-74 80–90

Limit operating modes

Standard Температура, °C
GOST 10994-74 < 90

Analogues

Russia
Сплав ЭП544

Standards

Standard Description
GOST 10994-74

Description of chemical elements

Element Units of measurement Description
ET % Total other items
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ni % Nickel

Description of physical characteristics

Parameter Units of measurement Description
Cp Дж/кг·К Specific heat of material
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ 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 magnetic properties

Parameter Units of measurement Description
$$\mu_{max}$$ $$MH/m$$ Magnetic permeability (not more)