Steel 18Х15Н3М (ДИ1)

Designation

Name The value
Designation GOST Cyrillic 18Х15Н3М
Designation GOST Latin 18X15H3M
Transliteration 18H15N3M
By chemical elements 18Cr15Н3Mo
Name The value
Designation GOST Cyrillic ДИ1
Designation GOST Latin DI1
Transliteration DI1
By chemical elements CuИ1

Description

18Х15Н3М steel is used: for the production of highly loaded parts, long operating at temperatures up to +550 °C in high humidity conditions; bars and strips steel hot-rolled and forged, calibrated bars used for the manufacture of parts of structures in the aircraft industry.

Standards

Name Code Standards
Sheets and strips В23 GOST 103-2006
Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006
Sheets and strips В33 GOST 4405-75
Bars and shapes В32 GOST 7417-75, TU 14-1-3297-82
Blanks. Of the workpiece. Slabs В31 TU 14-1-4492-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Mo W
TU 14-1-3297-82 0.15-0.21 ≤0.015 ≤0.03 ≤0.6 14.5-16.5 ≤0.6 2.5-3 Rest ≤0.25 0.3-0.5 ≤0.5
Fe is the basis.
According to TU 14-1-3297-82, the chemical composition is given for 18Х15Н3М-Ш (DI1-Ш) steel. At the request of the consumer, steel grade 18Х15Н3М-Ш (DI1-Ш) "select" can be made with the content of elements С = 0,15-0,19%, Ni = 2,70-3,00%.

Mechanical properties

Section, mm σU, MPa d5, % KCU, kJ/m2 HB, MPa
Bars and strip hot rolled and forged, bars calibrated. Quenching from a temperature of 930-1000 °C, cooling in oil, leave at a temperature of 560-640 °C, cooling in water
980 10 490 302-363

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
KCU Toughness
HB Brinell hardness number