AISI 420

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, %
ASTM A 240 < 84 < 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 2.18 25 7650 461 590
100 2.14 10.8 26 7630 482 650
200 2.06 11.9 27.2 7600 523 710
300 1.98 12.3 28.3 7570 565 790
400 1.88 13 29.1 7540 607 860
500 1.76 13.6 29.1 7510 674 940
600 1.63 13.5 29.1 7480 775 1000
700 1.48 13.8 28.3 7450 988 1120
800 1.4 14.6 27.9 7420 825 1180
900 28.5 691 1160

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ Treatment
Alloy 1700 1145 5.5 33.5 113 Variety
Alloy 1165 960 13 47.5 210 Variety

Standards

Standard Description
ASTM A 240

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
$$\sigma_{Y}$$ $$MPa$$ Yield strength
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$\psi$$ % Reduction in cross section on fracture
$$KCU\cdot 10^{3}$$ $$\frac{J}{m^2}$$ Impact toughness