2H6V8M2K8 (EP745)

The temperature of critical points Ac1 = 827, Ac3 (Acm) = 890, Mn = 180. Hardness after high tempering HB 1 0 -1 = 250 MPa.

needle punches for pressing heat-resistant and corrosion-resistant steels and alloys, and titanium alloys at temperatures up to 650−675 degrees C performed without intensive cooling

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Co, % Cr, % V, % P, % C, % S, % Mo, % W, %
72.59–76.43 0.3–0.6 0.15–0.4 7.5–8.5 6.5–7 0.1–0.25 < 0.03 0.22–0.3 < 0.03 1.8–2.3 7–8

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{P}, MPa \epsilon_L, % \psi, % Treatment
Metal rolling 15 1750 1450 2 6 Hardening 1180 ° C, oil, and Holidays

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy high leave 250

Critical point temperatures

Ac1, K Ac3(Acm), K Mn, K
827 890 180

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Co % Cobalt
Cr % Chrome
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
\epsilon_L % Elongation at break (longitudinal)
\psi % Reduction in cross section on fracture

Description of temperatures of critical points

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