20X13 (2Х13)

Structural elements of higher strength, such as axles, shafts, pump parts, piston rods, wedge valves, nozzle needles. Heat resistance 550grad, heat resistance 700 degrees. Weldability satisfactory by all types of welding, filler wire Sv-10H13 Sv-06H14

power engineering and pechestroenie; turbine blades, bolts, nuts, fittings cracking plants with long life at temperatures up to 500 degrees; martensitic steel grade

Classification

Country Section Category
CIS, Russia, Ukraine Corrosion-resistant alloys and steels Corrosion-resistant heat-resistant steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % P, % C, % S, %
GOST 5632-72 83.895–87.84 < 0.6 < 0.6 12–14 < 0.6 < 0.03 0.16–0.25 < 0.025

Information on suppliers

Physical characteristics

Temperature, °C E⋅109, MPa α⋅106, K−1 ϰ, Wm⋅K ρ, kgm3 c⋅10−3, Jkg⋅K R⋅10−6, Ω⋅m
20 218 23 7670 0.588
100 214 10.1 26 7660 0.461 0.653
200 208 11.2 26 7630 0.523 0.73
300 200 11.5 26 7600 0.565 0.8
400 189 11.9 26 7570 0.628 0.884
500 181 12.2 27 7540 0.691 0.952
600 169 12.8 26 7510 0.775 1.022
700 12.8 26 7480 0.963 1.102
800 13 27 7450
900 28

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers σU, MPa σP, MPa ϵL, % ψ, % KCU⋅103, Jm2 Treatment
Sheet GOST 5582-75 1–4 Transverse 490 20 Accommodation 740-800 ° C
Rod GOST 5949-75 650–830 440–635 10–16 50–55 590–780 Hardening and tempering
Bar of specified strength GOST 18907-73 510–780 14
Rod GOST 18968-73 670 490–655 18 50 690 Normalized and tempered
Forgings GOST 25054-81 < 600 Longitudinal 647 441 14–16 40–50 390–640 Hardening and tempering
The plates GOST 7350-77 510 375 20 Normalization

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Rod GOST 5949-75 annealing 126–197
Rod GOST 18968-73 normalization, average vacation 207–241
Forgings GOST 25054-81 197–248

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
Boundedly welded not sensitive inclined

Critical point temperatures

Ac1, K Ac3(Acm), K Ar1, K
820 950 780

Analogues

USA Germany
S42000 1.4021 (X20Cr13)

Standards

Standard Description
GOST 5632-72
GOST 5949-75

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur

Description of physical characteristics

Parameter Units of measurement Description
E⋅109 MPa Elastic modulus
α⋅106 K−1 Coefficient of thermal (linear) expansion (range 20°C–T)
ϰ Wm⋅K Coefficient of thermal conductivity (the heat capacity of the material)
ρ kgm3 The density of the material
c⋅10−3 Jkg⋅K The specific heat of the material (range 20°C–T)
R\cdot 10^{-6}R⋅10−6 \Omega\cdot mΩ⋅m Electrical resistivity

Description of mechanical properties

Parameter Units of measurement Description
\sigma _{U}σU MPaMPa Ultimate tensile strength
\sigma_{P}σP MPaMPa Proportionality limit
\epsilon_LϵL % Elongation at break (longitudinal)
\psiψ % Reduction in cross section on fracture
KCU\cdot 10^{3}KCU⋅103 \frac{J}{m^2}Jm2 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

Description of temperatures of critical points

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