Steel 15ДНМЛ

Designation

Name The value
Designation GOST Cyrillic 15ДНМЛ
Designation GOST Latin 15DHML
Transliteration 15DNML
By chemical elements 15CuНMo

Description

15ДНМЛ steel is used: for the manufacture of castings for critical stressed parts high-strength for shipbuilding with wall thickness up to 130 mm; parts operating at low temperatures.

Standards

Name Code Standards
Steel castings В82 OST 5Р.9285-95

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Mo
OST 5Р.9285-95 0.1-0.2 ≤0.03 ≤0.03 0.6-0.8 ≤0.3 0.12-0.4 0.8-1.2 Rest 0.6-0.9 0.15-0.2
Fe is the basis.
According to OST 5R.9285-95, the content of chromium up to 0.50% and molybdenum up to 0.12% is not a defect sign provided that the requirements of the standard are observed and if there are no special instructions in the technical conditions of the order or drawing.

Mechanical properties

sT|s0,2, MPa σU, MPa d HB, MPa
Castings for shipbuilding. Normalization at 950-980 °C + quenching in water from 930-950 °C + vacation at 630-660 °C, cooling in water
≥310 ≥490 ≥18 170-200

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
d Elongation after rupture
HB Brinell hardness number

Technological properties

Name The value
Weldability welded without any restrictions. The welding process - SMAW. With a significant amount of welding it is recommended that subsequent vacation.