4H3VMF (EI2, 40H3VMF)

Another designation 3I2. Temperature of critical points: Ac 1 = 800, Ac 3 (Ac m) = 850, Ar 3 (Arc m) = 760, Ar 1 = 730, Mn = 230. Hardness after annealing (GOST 5950−2000): HB 10 -1 = 241 MPa .

for small hammer punches, hammer and pressing inserts (thickness or diameter of 300 to 400 mm), the tool gorizontalnokovochnyh cars during hot deformation and heat-resistant structural steels; tools for high-speed punching machine structural steels

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, % W, %
GOST 5950-2000 91.26–94.3 0.6–0.9 0.3–0.6 2.8–3.5 < 0.3 < 0.4 0.6–0.9 < 0.03 0.4–0.48 < 0.03 0.4–0.6 0.6–1

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 1720 1520 560 Hardening of 1040-1060 ° C, the oil, leave 560-580 ° C, 530-570 ° 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
800 850 760 730 230

Analogues

USA
H10
T20810

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
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