15

bolts, screws, hooks and other parts, which are requirements of high ductility and operates at temperatures from -40 to 450 ° C; after HTO-levers, cams, nuts and other parts, which are requirements of high surface hardness and low strength of the core.

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Carbonaceous quality structural steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % As, % P, % C, % S, %
GOST 1050-88 97.785–99.36 0.17–0.37 0.35–0.65 < 0.25 < 0.3 < 0.3 < 0.08 < 0.035 0.12–0.19 < 0.04

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 201 53 7850
100 192 12.4 53 7827 0.465 0.233
200 185 13.2 53 7794 0.486 0.296
300 176 13.9 49 7759 0.515 0.387
400 156 14.4 46 7724 0.532 0.487
500 14.8 43 7687 0.565 0.607
600 15.1 39 7648 0.586 0.753
700 15.3 36 7611 0.62 0.904
800 14.1 32 7599 0.691 1.092
900 13.2 30 7584 0.708 1.14

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % Treatment
Sheet 4–14 heat-treated 320–440 30
Trumpet 510 430 8
Metal rolling GOST 1050-88 < 80 370 225 27 55 Normalization
Metal rolling GOST 1050-88 cold-work 440 8 45
Metal rolling GOST 1050-88 annealing 340 23 55
Tape annealing 310–490 20
Tape cold-work 440–780

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Sheet heat-treated 0–0
Round GOST 10702-78 hot rolling 0–0
Metal rolling GOST 1050-88 calibrated, cold-work 197
Metal rolling GOST 1050-88 hot rolling 0–0
Metal rolling GOST 1050-88 annealing, calibrated 0–0
Sheet annealing, fat 0–0

Technological Properties

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

Critical point temperatures

Ac1, K Ac3(Acm), K Ar3(Arcm), K Ar1, K
735 860 840 685

Analogues

USA Germany
M1017 1.1132 (Cq15)

Standards

Standard Description
GOST 1050-88

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Cu % Copper
Ni % Nickel
As % Arsenic
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

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

Description of temperatures of critical points

Parameter Units of measurement Description
Ac1 K
Ac3(Acm) K
Ar3(Arcm) K
Ar1 K