4HV2S (4H5V2FS, 4Х8В2, 4H3V8M, 4H3V2M2)

For pneumatic tools, chisels crimp.

pneumatic tools: chisels, cutters, cutting and trimming dies of complex shape, working with high shock loads.

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, % W, %
GOST 5950-73 93.74–95.9 0.6–0.9 0.15–0.4 1–1.3 < 0.3 < 0.35 < 0.03 0.35–0.45 < 0.03 2–2.5

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
Metal rolling 1470 1300 8 35 290 Tempering 880 ° C, oil

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy annealing 229

Technological Properties

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

Critical point temperatures

Ac1, K Ac3(Acm), K Mn, K
780 840 315

Analogues

Germany
1.2541 (35WCrV7)
35WCrV7

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
W % Tungsten

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
Mn K