Steel 15KH6SJU (ЭИ428)

Designation

Name The value
Designation GOST Cyrillic 15Х6СЮ
Designation GOST Latin 15X6CJu
Transliteration 15H6SYu
By chemical elements 15Cr6СAl
Name The value
Designation GOST Cyrillic ЭИ428
Designation GOST Latin EI428
Transliteration EhI428
By chemical elements -

Description

15KH6SJU steel is used: for the manufacture of parts of boilers and pipes.

Note

Temperature intense scaling in air +800 °C.
Stable in sulfur-containing environments.

Standards

Name Code Standards
Classification, nomenclature and General rules В30 GOST 5632-72
Bars and shapes В32 GOST 5949-75, TU 14-11-245-88
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al V Ti Mo W
GOST 5632-72 ≤0.15 ≤0.025 ≤0.03 ≤0.5 5.5-7 1.2-1.8 ≤0.6 Rest 0.3 0.7-1.1 ≤0.2 ≤0.2 ≤0.3 ≤0.2
Fe is the basis.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
Bars hot rolled and forged according to GOST 5949-75. Annealing at 750-780 °C, cooling in air or in oil
≥245 ≥440 ≥20 ≥40

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