Steel 10KH18N11BL (5Х18Н11БЛ)

Designation

Name The value
Designation GOST Cyrillic 10Х18Н11БЛ
Designation GOST Latin 10X18H11BL
Transliteration 10H18N11BL
By chemical elements 10Cr18Н11Nb
Name The value
Designation GOST Cyrillic 5Х18Н11БЛ
Designation GOST Latin 5X18H11BL
Transliteration 5H18N11BL
By chemical elements 5Cr18Н11Nb

Description

10KH18N11BL steel is used: for the manufacture of castings of valves for the chemical industry, collectors, exhaust systems, parts, furnace fittings, boxes and lids for pickling baskets; parts of gas turbines for different purposes, parts of turbochargers operating at low loads; parts of vehicles of cellulose, nitrogen, food and soap industries; for manufacture of pipes tsentrobezhnolityh for the manufacture of the coils of the tubular furnace installations production of ammonia, hydrogen, ethylene, carbon disulphide, etc., operating in the temperature range 760−1060 °C and a pressure of 3.92 MPa (40 kgf/cm2).

Note

Stabilized chromium-Nickel austenitic steel, corrosion resistant, heat resistant up to +800 °C.
Steel 10KH18N11BL insensitive to intergranular corrosion.

Standards

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 2176-77, TU 4112-78269737-009-05
Steel castings В82 GOST 977-88
Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004
Steel pipes and fittings to them В62 TU 1333-047-00220302-02

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Nb
GOST 977-88 ≤0.1 ≤0.03 ≤0.035 1-2 17-20 0.2-1 8-12 Rest - 0.45-0.9
GOST 2176-77 ≤0.1 ≤0.03 ≤0.035 1-2 17-20 0.2-1 8-12 Rest ≤0.3 0.45-0.9
Fe is the basis.
According to GOST 2176-77 the chemical composition is given for steel grade 10Х18Н11БЛ. 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
- ≥196 ≥441 ≥25 ≥35 ≥588
Casting for STP 26.260.484-2004. Quenching in water from 1100-1150 °C or Stabilizing annealing at 870-900 °C, air cooling
100 ≥200 ≥450 ≥25 ≥35 ≥590

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 Casting of stabilized steel foundry quenched in order to: a) prevent the tendency to intergranular corrosion (products can operate in temperatures up to 350 °C); b) to increase resistance against General corrosion; C) to eliminate the revealed tendency to intergranular corrosion; g) to prevent the tendency to stab corrosion; d) to eliminate residual stress (products simple configuration); e) to increase the plasticity of the material. The quenching products should be carried out on mode: heating to 1050-1100 °C, items material thickness up to 10 mm cooling on air, more than 10 mm in water. The holding time at the heating for hardening to products with a wall thickness up to 10 mm - 30 min, over 10 mm - 20 min + 1 min per 1 mm maximum thickness. For more austenization steel 10KH18N11BL hardening must be 1150 °C. When working in environments that cause stress corrosion cracking, castings should be subjected to stabilizing annealing regime: heating up to 870-900 °C, exposure time of 2-3 h, cooling in air.