08kp

for gaskets, washers, plugs, pipes, as well as parts subject to chemical and thermal treatment — sleeves, lugs, links.

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 98.495–99.7 < 0.03 0.25–0.5 < 0.1 < 0.3 < 0.3 < 0.08 < 0.035 0.05–0.12 < 0.04

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 203 63 7871 0.147
100 207 12.5 60 7846 0.482 0.178
200 182 13.4 56 7814 0.498 0.252
300 153 14 51 7781 0.514 0.341
400 141 14.5 47 7745 0.533 0.448
500 14.9 41 7708 0.555 0.575
600 15.1 37 7668 0.584 0.725
700 15.3 34 7628 0.626 0.898
800 14.7 30 7598 0.695 1.073
900 12.7 27 7602 0.703 1.124
1000 13.8 0.695

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 4–8 270–370 34
Trumpet GOST 5005-82 390 350 10
Trumpet GOST 10705-80 294 174 27
Rental calibrated. Hardened. GOST 10702-78 370 8 60
The steel is calibrated. GOST 10702-78 314–412 60 Annealing
Band 6–60 290 175 35 60 Normalization

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Sheet termoobrabotki. 1000
Rental hot rolled. GOST 10702-78 1150
Rental calibrated. GOST 10702-78 1310

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
732 874 854 680

Analogues

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