4H5V2FS (EI958, 40H5V2FS)

Another designation EI958. Temperature of critical points: Ac1 = 800, Ac3 (Acm) = 875, Ar3 (Arcm) = 840, Ar1 = 730, Mn = 275. Hardness after annealing (GOST 5950−2000): HB 10 -1 = 241 MPa .

mold die casting of zinc, aluminum and magnesium alloys, Molotov and pressing the insert (section 200−250 mm) at the hot deformation of structural steels, tool for landing pieces of alloy structural and heat-resistant materials 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, % W, %
GOST 5950-2000 88.54–92 0.8–1.2 0.15–0.45 4.5–5.5 < 0.3 < 0.4 0.6–0.9 < 0.03 0.35–0.45 < 0.03 1.6–2.2

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ Treatment
Metal rolling 10 1760 1690 300 Hardening of 1030-1050 ° C, the oil, leave 560-580 ° C, 530-540 ° C and Holidays

Brinell hardness number

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

Critical point temperatures

Ac1, K Ac3(Acm), K Ar3(Arcm), K Ar1, K Mn, K
800 875 840 730 275

Analogues

Germany
GS-55 NiCrMoV 6

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
W % Tungsten

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\sigma_{P}$$ $$MPa$$ Proportionality limit
$$KCU\cdot 10^{3}$$ $$\frac{J}{m^2}$$ 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