21H2NVFA (EI712K)

for the manufacture of rolled products used in the heat-treated

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Alloyed structural steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ti, % Cu, % Ni, % V, % P, % C, % S, % Mo, % W, %
GOST 11268 - 76 92.94–95.46 0.17–0.37 0.3–0.7 1.9–2.4 < 0.03 < 0.25 0.8–1.2 0.18–0.28 < 0.025 0.19–0.23 < 0.025 < 0.15 1–1.4

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ d5, % Treatment
The plates GOST 11269-76 490–740 15 Normalization
The plates GOST 11269-76 1130 390 9 Hardening and tempering
Sheet GOST 11268 - 76 490–740 15 Normalization
Sheet GOST 11268 - 76 1130 9 Hardening and tempering

Brinell hardness number

Rolling Standard Classifiers Value, HBW
The plates GOST 11269-76 normalization 156–217

Standards

Standard Description
GOST 11268 - 76

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ti % Titan
Cu % Copper
Ni % Nickel
V % Vanadium
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum
W % Tungsten

Description of mechanical properties

Parameter Units of measurement Description
d5 % Elongation at break
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$KCU\cdot 10^{3}$$ $$\frac{J}{m^2}$$ Impact toughness