Steel 09KH17N7JU (ЭИ973)

Designation

Name The value
Designation GOST Cyrillic 09Х17Н7Ю
Designation GOST Latin 09X17H7Ju
Transliteration 09H17N7Yu
By chemical elements 09Cr17Н7Al
Name The value
Designation GOST Cyrillic ЭИ973
Designation GOST Latin EI973
Transliteration EhI973
By chemical elements -

Description

09KH17N7JU steel is used: for the manufacture of wing devices, rudders and brackets, working in sea water.

Note

Stainless steel austenitic-martensitic class. The best corrosion resistance the steel has, after two-time first holiday 740−760 °C.

Standards

Name Code Standards
Classification, nomenclature and General rules В30 GOST 5632-72
Sheets and strips В33 GOST 7350-77, TU 14-1-394-72
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90
Processing of metals by pressure. Forgings В03 TU 14-1-3589-83
Bars and shapes В32 TU 14-11-245-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al V Ti Mo W
GOST 5632-72 ≤0.09 ≤0.02 ≤0.03 ≤0.08 16-17.5 ≤0.8 7-8 Rest ≤0.3 0.5-0.8 ≤0.2 ≤0.2 ≤0.3 ≤0.2
Fe is the basis.

Mechanical properties

sT|s0,2, MPa σU, MPa d5, % KCU, kJ/m2
Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Hardening in air, 1030-1070 °C to + First vacation at 740-760 °C, air cooling or water + Second vacation at 580-680 °C, air cooling
≤735 ≥830 ≥12 ≥490

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
KCU Toughness