15kp

elements of pipe connections, fittings, plugs and other parts kotloturbostroeniya operating at temperatures from -40 to 425 ° C; after carburizing and cyanide — the details of which require high surface hardness and low core strength (fasteners, shafts, levers and other parts.).

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 98.235–99.63 < 0.07 0.25–0.5 < 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 7850
100 192 12.4 53 7827 0.465 0.233
200 185 13.2 53 7794 0.486 0.296
300 172 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
1000 13.3

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % Treatment
Sheet termoobrabotki. GOST 4041-71 4–14 320–440 30
Trumpet GOST 10705-80 314 196 25
The steel is calibrated. GOST 10702-78 392 8 50
Band GOST 1577-93 6–60 350 205 29 55 Normalization

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Sheet termoobrabotki. GOST 4041-71 1210
The bar is hot rolled. GOST 10702-78 1250
Sheet annealed. GOST 1577-93 fat 1430

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
735 863 840 685

Analogues

USA Germany
M1017 1.1132 (Cq15)
1.0332 (DD11)

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