Steel 35KH23N7SL (25Х23Н7СЛ)

Designation

Name The value
Designation GOST Cyrillic 35Х23Н7СЛ
Designation GOST Latin 35X23H7CL
Transliteration 35H23N7SL
By chemical elements 35Cr23Н7С
Name The value
Designation GOST Cyrillic 25Х23Н7СЛ
Designation GOST Latin 25X23H7CL
Transliteration 25H23N7SL
By chemical elements 25Cr23Н7С

Description

35KH23N7SL steel is used: for the manufacture of casting parts of tube furnaces of oil refineries and other parts operating at temperatures up to +1000 °C; casting parts mining and metallurgical equipment; hinged cast chains for rotary kilns, consisting of high-temperature or heat-resistant parts applied in the middle area when the temperature of the gas stream +500−1000 °C.

Note

Heat-resistant steel austenite-ferritic class.
Steel corrosion-resistant in sulphurous environments and heat-resistant at temperatures up to +1000 °C.

Standards

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 2176-77, KSt 81-033:2009, TU 38-1121-79, TU 4112-07507311-010-02
Steel castings В82 GOST 977-88, OST 24.920.01-80
Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu
KSt 81-033:2009 ≤0.35 ≤0.035 ≤0.035 0.5-0.85 21-25 0.5-1.2 6-8 Rest -
GOST 2176-77 ≤0.35 ≤0.035 ≤0.035 0.5-0.85 21-25 0.5-1.2 6-8 Rest ≤0.3
Fe is the basis.
According to GOST 2176-77 the chemical composition is given for steel grade 35Х23Н7СЛ. 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, % KCU, kJ/m2
The castings are supplied according to GOST 2176-77
- ≥245 ≥539 ≥12 ≥40 ≥294
Casting for STP 26.260.484-2004. Without heat treatment
100 ≥250 ≥550 ≥12 ≥25 ≥294

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
KCU Toughness

Technological properties

Name The value
Features of heat treatment Steel castings 35KH23N7SL heat treatment not subjected to.