Structural steel alloy 35X23N7SL (25H23N7SL)

  • Chemical composition
C Carbon <0.35
Si Silicon 0.5 — 1.2
Mn Manganese 0.50 — 0.85
P Phosphorus <0.035
S Sulfur <0.035
Cr Chromium 21.0 — 25.0
Ni Nickel 6.0 — 8.0
Fe Iron Rest

With voystva after heat treatment:

Yield Strength:> 245 MPa

Temporary resistance:> 540 MPa

Elongation:> 12%

Density — 7720 kg / m3

Production in Russia is carried out in accordance with the standards GOST 4543−81 and GOST 977−87. Steel is intended for the production of details of tube furnaces of oil refineries and other parts that are corrosion-resistant in sulfuric environments and operating at temperatures up to 1000 ° C; austenitic — ferritic steel

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, % Ni, % P, % C, % S, %
GOST 977-88 64.53–72 0.5–1.2 0.5–0.85 21–25 6–8 < 0.035 < 0.35 < 0.035

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Castings GOST 977-88 540 245 12

Режимы термической обработки

Обработка
Без термической обработки

Standards

Standard Description
GOST 977-88

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur

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)