40X13 (4Х13)

Cutting, measuring, surgical tools, springs, carburetor needles, household items, valve plates of compressors. Steel does not weld.

spring for operation at temperatures up to 400−450 degrees. Springs, ball bearings, cutting and measuring tools; 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 83.705–87.65 < 0.6 < 0.6 12–14 < 0.6 < 0.03 0.35–0.44 < 0.025

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 218 25 7650 0.461 0.59
100 214 10.8 26 7630 0.482 0.65
200 206 11.9 27.2 7600 0.523 0.71
300 198 12.3 28.3 7570 0.565 0.79
400 188 13 29.1 7540 0.607 0.86
500 176 13.6 29.1 7510 0.674 0.94
600 163 13.5 29.1 7480 0.775 1
700 148 13.8 28.3 7450 0.988 1.12
800 140 14.6 27.9 7420 0.825 1.18
900 28.5 0.691 1.16

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Sheet GOST 5582-75 550 15 Annealing 740-800 ° C
Bar of specified strength GOST 18907-73 590–810 10
Wire GOST 18143-72 640–880 10–14

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy Hardening, average vacation 460–550
Rod GOST 5949-75 annealing 143–229

Technological Properties

Weldability
Not applicable for welded structures

Critical point temperatures

Ac1, K Ar1, K
800 780

Analogues

USA Germany
420 1.4031 (X39Cr13)

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
$$E\cdot 10^{9}$$ $$MPa$$ 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
$$\epsilon_L$$ % Elongation at break (longitudinal)

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
Ar1 K