Steel 18KH25N19SL (15Х25Н19СЛ)

Designation

Name The value
Designation GOST Cyrillic 18Х25Н19СЛ
Designation GOST Latin 18X25H19CL
Transliteration 18H25N19SL
By chemical elements 18Cr25Н19С
Name The value
Designation GOST Cyrillic 15Х25Н19СЛ
Designation GOST Latin 15X25H19CL
Transliteration 15H25N19SL
By chemical elements 15Cr25Н19С

Description

18KH25N19SL steel is used: for the manufacture of castings in corrosion resistant, acid-resistant and heat-resistant parts; parts of steam and gas turbines, boilers, blades and shrouds of the nozzle compressors and turbines and other components operating at high temperatures.

Note

Steel corrosion resistant, acid resistant, heat resistant austenitic class.

Standards

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 2176-77
Steel castings В82 GOST 977-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
GOST 977-88 ≤0.18 ≤0.03 ≤0.035 0.7-1.5 22-26 0.8-2 17-21 Rest - - - - -
GOST 2176-77 ≤0.18 ≤0.03 ≤0.035 0.7-1.5 22-26 0.8-2 17-21 Rest ≤0.3 ≤0.2 ≤0.2 ≤0.2 ≤0.4
Fe is the basis.
According to GOST 2176-77, the chemical composition is given for steel grade 18Х25Н19СЛ. Deviations from the norms of chemical composition are allowed: for carbon ± 0.020%; for silicon ± 0.10%; on manganese, copper, chromium and nickel ± 0.10% each; by titanium and tungsten ± 0.050% each; by vanadium, molybdenum and niobium ± 0.020% each.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
Casting. Quenching in water, oil or air with 1090-1110 °C
100 ≥245 ≥491 ≥25 ≥28

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing