Steel 08G2DNFL

Designation

Name The value
Designation GOST Cyrillic 08Г2ДНФЛ
Designation GOST Latin 08G2DHFL
Transliteration 08G2DNFL
By chemical elements 08Mn2CuНV

Description

08G2DNFL steel is used: for the manufacture of castings of large body parts; the upper parts of the frames of the crankcases, and beds of bearings, castings excavators heavy-duty and other sariaydin details high tensile strength; a variety of large parts for shipbuilding section up to 850 mm.

Note

Cold-resistant, dispersion-hardening steel of pearlitic class.

Standards

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 21357-87
Steel castings В82 OST 5Р.9285-95, TU 108-11.973-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V
GOST 21357-87 0.05-0.1 ≤0.02 ≤0.02 1.3-1.7 ≤0.3 0.15-0.4 1.15-1.55 Rest 0.8-1.1 0.02-0.08
OST 5Р.9285-95 0.05-0.1 ≤0.03 ≤0.03 1.3-1.7 ≤0.3 0.15-0.4 1.15-1.55 Rest 0.8-1.1 0.1
Fe is the basis.
According to GOST 21357-87, the mass fraction of rare-earth metals (REM-yttrium, cerium, etc.) in steel should be in the range of 0.02-0.05%.
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. Vanadium is introduced by calculation.
In steel smelted in an open-hearth furnace, the carbon content is allowed not more than 0.12%, the content of sulfur and phosphorus is not more than 0.035% of each.

Mechanical properties

sT|s0,2, MPa σU, MPa d y, % KCU, kJ/m2 HB, MPa
Castings for shipbuilding. 1-I Normalization at 930-970 °C + 2-I Normalization at 910-940 °C + vacation at 590-650 °C, air cooling
≥380 ≥480 ≥20 ≥45 ≥800 159-192
Castings for shipbuilding. Normalization at 930-970 °C + quenching in water from 910-940 °C + vacation at 590-650 °C, air cooling
≥400 ≥500 ≥20 ≥45 ≥500 159-192
Casting. Normalization at 930-970 °C, air cooling + normalization at 920-950 °C, air cooling + vacation at 590-630 °C, air cooling (KCU-60)
≥400 ≥500 ≥20 ≥45 ≥4 -

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
y The relative narrowing
KCU Toughness
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.