30Ch13 (3Х13)

Cutting, measuring, surgical and measuring tools, springs, carburetor needles, household goods, valve plates of compressors, piston rods, screws. Temperatures up to 450 degrees, slightly aggressive environments. Steel does not weld.

cutting, measuring tools, springs, carburetor needle rods of reciprocating compressors, components inside the machine devices and other various parts working for wear in slightly aggressive environments up to 450 ° C .; 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, % Ti, % Cu, % Ni, % P, % C, % S, %
GOST 5632-72 82.895–87.74 < 0.8 < 0.8 12–14 < 0.2 < 0.3 < 0.6 < 0.03 0.26–0.35 < 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
20 223 7670 0.522
100 9.98 26.4 7650 0.473 0.595
200 214 10.65 27.2 7620 0.502 0.684
300 206 11.13 27.7 7600 0.54 0.769
400 197 11.7 27.7 7570 0.582 0.858
500 185 11.83 27.2 7540 0.653 0.935
600 174 12.3 26.7 7510 0.749 1.015
700 12.5 25.6 7480 0.879 1.099
800 12.6 25.1 7450 0.783
900 26.7 7460 0.657

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{P}, MPa \epsilon_L, % \psi, % KCU\cdot 10^{3}, \frac{J}{m^2} Treatment
Sheet GOST 5582-75 1–4 Transverse 540 17 Accommodation 740-800 ° C
Bar of specified strength GOST 18907-73 530–780 12
Wire GOST 18143-72 590–830 12–16
Forgings GOST 25054-81 < 600 Longitudinal 735 588 10–12 35–40 290–390 Hardening and tempering

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy GOST 25054-81 Hardening, average vacation 235–277
Rod GOST 5949-75 annealing 131–207

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
Not applicable for welded structures not sensitive loathsome

Critical point temperatures

Ac1, K Ac3(Acm), K Ar3(Arcm), K Ar1, K Mn, K
810 860 660 710 240

Analogues

USA Germany
S42020 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
Ti % Titan
Cu % Copper
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
\sigma_{P} MPa Proportionality limit
\epsilon_L % Elongation at break (longitudinal)
\psi % Reduction in cross section on fracture
KCU\cdot 10^{3} \frac{J}{m^2} 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
Ar3(Arcm) K
Ar1 K
Mn K