12H25N5TMFL (10H25N5TMFL)

for the reinforcement of the chemical industry, aircraft parts and other industries, heat resistant at temperatures up to 600 degrees C, and components operating under pressure up to 30 MPa; steel austenitic — ferritic class

Classification

Country Section Category
CIS, Russia, Ukraine Steels and alloys for castings Steel for casting with special properties

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ti, % Ni, % V, % P, % C, % S, % Mo, % N, %
GOST 977-88 64.85–70.71 0.2–1 0.3–0.8 23.5–26 0.08–0.2 5–6.5 0.07–0.15 < 0.03 < 0.12 < 0.03 0.06–0.12 0.08–0.2

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
Castings GOST 977-88 540 392 12 40 294 Hardening 1150 ° C, cooling of 980 ° C, the furnace

Heat Treatment Modes

Treatment
Hardening 1140 - 1160 ° C, cooling in the furnace 970 - 990 ° C, cooling in oil

Analogues

USA Germany
J92740 1.446 (X3CrNiMoN27-5-2)

Standards

Standard Description
GOST 977-88

Description of chemical elements

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

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