Steel 03Н18К8М3ТЮ (ЗИ25)

Designation

Name The value
Designation GOST Cyrillic 03Н18К8М3ТЮ
Designation GOST Latin 03H18K8M3TJu
Transliteration 03N18K8M3TYu
By chemical elements 03Н18Co8Mo3TiAl
Name The value
Designation GOST Cyrillic ЗИ25
Designation GOST Latin ZI25
Transliteration ZI25
By chemical elements ЗИ25

Description

03Н18К8М3ТЮ steel is used: for the production of ingots for the manufacture of parts of equipment of power plant engineering, shipbuilding and the chemical industry by a method of metal forming and machining.

Note

Partenitskaya steel.

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 TU 14-1-4090-86

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al Ti Mo Co
TU 14-1-4090-86 ≤0.03 ≤0.01 ≤0.01 ≤0.1 ≤0.25 ≤0.15 17.5-18.5 Rest 0.05-0.15 0.2-0.35 3.3-3.8 8-8.5
Fe is the basis.
According to TU 14-1-4090-86 the chemical composition is given for steel grade 03Н18К8М3ТЮ-ВД (ЗИ25-ВД). Deviations from the specified chemical composition are allowed: for nickel ± 0.30%, for molybdenum ± 0.30%, for cobalt ± 0.30%, for titanium +0.050%. The content of residual elements must comply with GOST 5632.

Technological properties

Name The value
Macrostructure and pollution In the macrostructure of the metal bars on the other 14-1-4090-86 on the etched transverse templeto with a side of a square 90-100 mm. should not be the remnants of a shrinkage pipe, podnasadochnogo looseness, bubbles, czernowin, foreign non-metallic and slag inclusions, visible without using the magnifying devices.