Steel 12KH18N12BL (10Х18Н12БЛ)

Designation

Name The value
Designation GOST Cyrillic 12Х18Н12БЛ
Designation GOST Latin 12X18H12BL
Transliteration 12H18N12BL
By chemical elements 12Cr18Н12Nb
Name The value
Designation GOST Cyrillic 10Х18Н12БЛ
Designation GOST Latin 10X18H12BL
Transliteration 10H18N12BL
By chemical elements 10Cr18Н12Nb

Description

12KH18N12BL steel is used: for the manufacture of cast parts of power plant with long term operation at temperatures up to +600−650 °C and short term operation at temperatures up to 700 °C.

Note

Corrosion resistant, heat resistant up to 650 °C austenitic steel.

Standards

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 2176-77
Steel castings В82 GOST 977-88
Welding and cutting metals. Soldering, riveting В05 RTM 108.020.122-78

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Nb
GOST 977-88 ≤0.12 ≤0.025 ≤0.02 0.5-1 17-19 ≤0.55 11-13 Rest - 0.7-1.1
GOST 2176-77 ≤0.12 ≤0.025 ≤0.02 0.5-1 17-19 ≤0.55 11-13 Rest ≤0.3 0.7-1.1
Fe is the basis.
According to GOST 977-88, the total mass fraction of sulfur and phosphorus should not be more than 0.040%.
According to GOST 2176-77 the chemical composition is given for steel grade 12Х18Н12БЛ. The total content of sulfur and phosphorus should not be more than 0.040%. 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
Casting. Hardening in air, 1170-1190 °C + Aging at 790-810 °C (10h exposure.) + Aging at 740-760 °C (16 h exposure)
100 ≥196 ≥392 ≥13 ≥18 ≥196

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
Welding defects Welding defects of manual welding is performed without preheating electrodes type e-08Х19Н10Г2Б (GOST 10052) brand DH-15.