12x1 (EP430, 120X)

Another designation 120X, EP430. T temperature of critical points of steel 12Х1: Ac1 = 750, Ac3 (Acm) = 890, Mn = 245. Hardness after annealing (GOST 5950−2000): HB 10 -1 = 241 MPa.

for measuring instrument (tiles, gauges, templates)

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ti, % Cu, % Ni, % V, % P, % C, % S, % Mo, % W, %
GOST 5950-2000 94.76–97.15 0.1–0.4 0.3–0.6 1.3–1.65 < 0.03 < 0.3 < 0.4 < 0.15 < 0.03 1.15–1.25 < 0.03 < 0.2 < 0.2

Information on suppliers

Critical point temperatures

Ac1, K Ac3(Acm), K Mn, K
750 890 245

Analogues

Germany Poland Czech Republic
140 Cr 2 NC6 19422

Standards

Standard Description
GOST 5950-2000 GOST

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ti % Titan
Cu % Copper
Ni % Nickel
V % Vanadium
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum
W % Tungsten

Description of temperatures of critical points

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