Steel 03Х20Н45М5Б (ЧС32; 03ХН45МБ)

Designation

Name The value
Designation GOST Cyrillic 03Х20Н45М5Б
Designation GOST Latin 03X20H45M5B
Transliteration 03H20N45M5B
By chemical elements 03Cr20Н45Mo5Nb
Name The value
Designation GOST Cyrillic ЧС32
Designation GOST Latin ChC32
Transliteration ChS32
By chemical elements ZrС32
Name The value
Designation GOST Cyrillic 03ХН45МБ
Designation GOST Latin 03XH45MB
Transliteration 03HN45MB
By chemical elements 03CrН45MoNb

Description

03Х20Н45М5Б steel is used: for the manufacture of products, operating at high temperatures in special environments; steam generators for operation at temperatures up to +750 °C.

Standards

Name Code Standards
Bars and shapes В32 TU 14-1-769-73

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N Mo Nb
TU 14-1-769-73 ≤0.03 ≤0.015 ≤0.015 1 19-21 ≤0.8 44-46 Rest ≤0.2 ≤0.025 4-6 0.9-1.3
Fe is the basis.
According to TU 14-1-769-73 the chemical composition is given for steel grade 03Х20Н45МБ-ВИ (ЧС32-ВИ). The chemical composition of the steel allowed deviations from the chemical composition within the limits of table 2 of GOST 5632, with the exception of nitrogen. Deviations are allowed for carbon, chromium, nickel and elements not listed in Table 2 of GOST 5632 - as agreed by the parties.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
Bars of steel 03Х20Н45М5Б-VI on the other 14-1-769-73. Austenization at 1050-1100 °C
≥245 ≥540 ≥35 ≥65
≥167 ≥440 ≥35 ≥55
≥147 ≥440 ≥35 ≥55

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