Steel 10Х17Н10Г4МБЛ (ЭИ402МЛ; 10Х17Н10Г4МБЛС)

Designation

Name The value
Designation GOST Cyrillic 10Х17Н10Г4МБЛ
Designation GOST Latin 10X17H10G4MBL
Transliteration 10H17N10G4MBL
By chemical elements 10Cr17Н10Mn4MoNb
Name The value
Designation GOST Cyrillic ЭИ402МЛ
Designation GOST Latin EI402ML
Transliteration EhI402ML
By chemical elements -
Name The value
Designation GOST Cyrillic 10Х17Н10Г4МБЛС
Designation GOST Latin 10X17H10G4MBLC
Transliteration 10H17N10G4MBLS
By chemical elements 10Cr17Н10Mn4MoNbBeС

Description

10Х17Н10Г4МБЛ steel is used: for the manufacture of castings in corrosion and heat resistant parts; cast parts of plants. casting parts for gas turbines and axial compressors operating at temperatures to +650 °C and manufactured by investment casting; segments of the diaphragms of gas turbine GT-100.

Note

Steel corrosion and heat resistant austenitic class.

Standards

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 2176-77
Steel castings В82 OST 108.961.04-80, TU 108.02.123-87

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Mo Nb
GOST 2176-77 ≤0.12 ≤0.025 ≤0.025 3.5-4.5 16-18 ≤0.6 9.5-11 Rest ≤0.3 0.9-1.2 0.7-1
Fe is the basis.
According to GOST 2176-77, the chemical composition is given for steel grade 10Х17Н10Г4МБЛ (ЭИ402МЛ). 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

sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
Casting parts of gas turbines. Normalization at 1160-1180 °C (exposure 8 h), air cooling + Vacation at 750 °C (16 h exposure), air cooling
≥196 ≥392 ≥15 ≥25 ≥390 145-150

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
HB Brinell hardness number