4HMFS (40HSMF)

The temperature of critical points Ac 1 = 760, Ac 3 (Ac m) = 805, Ar 3 (Arc m) = 710, Ar 1 = 630, Mn = 280. Hardness after heat treatment (GOST 5950−2000): HB 10 -1 = 241 MPa.

steam-hammer dies and pneumatic hammers with falling parts weighing up to 3 tons with deformation of structural alloyed and stainless steels, pressing tools for the machining of aluminum alloys, inserts and punches landing on horizontal forging machines.

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % V, % P, % C, % S, % Mo, %
GOST 5950-2000 93.69–95.93 0.5–0.8 0.5–0.8 1.5–1.8 < 0.3 < 0.4 0.3–0.5 < 0.03 0.37–0.45 < 0.03 0.9–1.2

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
Stamping < 500 1450 1280 7 20 200 Tempering 950 ° C, oil, leave 550 ° C

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy GOST 5950-73 heat-treated 241

Critical point temperatures

Ac1, K Ac3(Acm), K Ar3(Arcm), K Ar1, K Mn, K
760 805 710 630 280

Analogues

Germany France Austria
1.2323 (48CrMoV6-7) 45CrMoV6 BOHLERW326

Standards

Standard Description
GOST 5950-2000 GOST

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Cu % Copper
Ni % Nickel
V % Vanadium
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

Description of temperatures of critical points

Parameter Units of measurement Description
Ac1 K
Ac3(Acm) K
Ar3(Arcm) K
Ar1 K
Mn K