50L

gears, sliders, wheels, gears industrial machines, rolls large-, medium- and small-section rolling mills for soft metal. Steel is used in the normalized or improved state, and after the surface hardening with heating HDTV.

Classification

Country Section Category
CIS, Russia, Ukraine Steels and alloys for castings Ordinary steel for castings

Chemical composition

Standard Fe, % Si, % Mn, % P, % C, % S, %
GOST 977-88 97.91–98.88 0.2–0.52 0.45–0.9 < 0.06 0.47–0.55 < 0.06

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 219 48 7820 0.191
100 214 12 48 0.479 0.24
200 208 12.4 46 0.5 0.321
300 196 12.8 44 0.517 0.407
400 178 13.3 41 0.542 0.509
500 170 13.7 38 0.559 0.631
600 155 14.1 34 0.584 0.779
700 136 14.5 30 0.617 0.941
800 122 12.4 25 0.727 1.139
900 13.3 26 0.71 1.17

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ Treatment
Castings GOST 977-88 < 100 569 334 11 20 245 Normalization of 860-880 ° C, 600-630 ° C and Holidays
Castings GOST 977-88 736 392 14 20 294 Tempering 860-880 ° C, 600-630 ° C and Holidays

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy 159–240

Technological Properties

Weldability
Boundedly welded

Heat Treatment Modes

Treatment
Normalization 860 - 880 ° C, Release 600 - 630 ° C
Tempering 860 - 880 ° C, Release 600 - 630 ° C

Analogues

Germany USA
GS-60 A732(4A)

Standards

Standard Description
GOST 977-88

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
P % Phosphorus
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)
$$\rho$$ $$\frac{kg}{m^3}$$ The density of the material
$$c\cdot 10^{-3}$$ $$\frac{J}{kg\cdot K}$$ The specific heat of the material (range 20°C–T)
$$R\cdot 10^{-6}$$ $$\Omega\cdot m$$ Electrical resistivity

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\sigma_{P}$$ $$MPa$$ Proportionality limit
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$\psi$$ % Reduction in cross section on fracture
$$KCU\cdot 10^{3}$$ $$\frac{J}{m^2}$$ Impact toughness

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