5HGM (5HNM, 5HNV, 6HBC, 5ХНС, 5ХНСВ, 5HGSVFYU)

Substitutes: 5ХНМ, 5ХНВ, 6ХВС, 5ХНС, 5ХНСВ, 5ХГСВФЮ Steel is not used for welded structures, prone to temper embrittlement. Flock sensitivity: sensitive. Hardness after annealing: HB 10 -1 = 241 MPa .

steam-hammer dies and pneumatic hammers with falling parts weighing up to 3 tons, forging dies for hot stamping, rolls of large, medium and small-section rolling mills for hard metal.

Classification

Country Section Category
CIS, Russia, Ukraine Tool steel Die tool steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, % Mo, %
GOST 5950-73 95.29–97.3 0.25–0.6 1.2–1.6 0.6–0.9 < 0.3 < 0.35 < 0.03 0.5–0.6 < 0.03 0.15–0.3

Information on suppliers

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
Alloy 1570 1450 9 26 360 Tempering 850 ° C, oil, leave 450 ° C, 2 h

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy annealing 241

Technological Properties

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

Critical point temperatures

Ac1, K Ac3(Acm), K Ar3(Arcm), K Mn, K
700 800 700 220

Analogues

Germany
1.2311 (40CrMnMo7)

Standards

Standard Description
GOST 5950-73

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
\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
Mn K