38HGNM

for the production of special fasteners, shafts, axles and other critical parts of mining and smelting and oil drilling equipment, which are requirements of high strength.

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, % Mo, %
GOST 10702-78 96.48–98.01 0.17–0.37 0.5–0.8 0.4–0.6 < 0.3 0.4–0.7 < 0.035 0.37–0.43 < 0.035 0.15–0.25

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\psi$$, % Treatment
The steel is calibrated. GOST 10702-78 686 60 Annealing

Analogues

USA Germany
8740 1.6546 (40NiCrMo2-2)

Standards

Standard Description
GOST 10702-78

Description of chemical elements

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

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\psi$$ % Reduction in cross section on fracture