Steel 20KH25N19S2L (15Х25Н19С2Л)

Designation

Name The value
Designation GOST Cyrillic 20Х25Н19С2Л
Designation GOST Latin 20X25H19C2L
Transliteration 20H25N19S2L
By chemical elements 20Cr25Н19С2
Name The value
Designation GOST Cyrillic 15Х25Н19С2Л
Designation GOST Latin 15X25H19C2L
Transliteration 15H25N19S2L
By chemical elements 15Cr25Н19С2

Description

20KH25N19S2L steel is used: for the manufacture of castings of parts operating at high temperatures in a highly stressed condition (retorts for annealing, heat treatment furnaces and parts boxes for carburizing); tsentrobezhnolityh pipes used as components in equipment for metallurgical, engineering, glass, ceramic, mining and processing petrochemical industry and is intended for the manufacture of blanks and parts used in the composition of the products of aviation and the nuclear industry.

Note

Steel corrosion resistant austenitic, heat resistant up to +1100 °C.

Standards

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 2176-77, TU 14-1-959-74
Steel castings В82 GOST 977-88, OST 24.920.01-80, OST 3-4365-79
Steel pipes and fittings to them В62 TU 1333-003-76886532-2014

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu
TU 1333-003-76886532-2014 ≤0.2 ≤0.03 ≤0.035 0.5-1.5 23-27 2-3 18-20 Rest -
GOST 2176-77 ≤0.2 ≤0.03 ≤0.035 0.5-1.5 23-27 2-3 18-20 Rest ≤0.3
Fe is the basis.
According to GOST 2176-77, the chemical composition is given for steel grade 20Х25Н19С2Л. 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
Casting. Normalization at 1100-1150 °C, air cooling
- ≥245 ≥490 ≥20 ≥25

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