Steel 27KHGSNMDTL (27ХГСНМДТЛА)

Designation

Name The value
Designation GOST Cyrillic 27ХГСНМДТЛ
Designation GOST Latin 27XGCHMDTL
Transliteration 27HGSNMDTL
By chemical elements 27CrMnСНMoCuTi
Name The value
Designation GOST Cyrillic 27ХГСНМДТЛА
Designation GOST Latin 27XGCHMDTLA
Transliteration 27HGSNMDTLA
By chemical elements 27CrMnСНMoCuTiBe

Description

27KHGSNMDTL steel is used: for the manufacture of casting bits of rippers frozen soil rollers heavy bulldozers, the leading gear, sprocket track-type machines, and other details.

Note

Cold-resistant steel.

Standards

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 21357-87, TU 48-43-653-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Ti Mo
GOST 21357-87 0.22-0.31 ≤0.02 ≤0.02 0.9-1.5 0.7-1.3 0.7-1.3 0.7-1.2 Rest 0.3-0.5 0.03-0.07 0.1-0.3
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%.

Mechanical properties

sT|s0,2, MPa σU, MPa d y, % KCU, kJ/m2 HB, MPa
Casting. Quenching in water from 910-930 °C + vacation at 200-220 °C, air cooling (KCU-60). Steel is used as wear-resistant
≥1150 ≥1400 ≥8 ≥12 ≥4 ≥390
Casting. Quenching in water from 910-930 °C + vacation at 640-660 °C, air cooling (KCU-60)
≥700 ≥850 ≥12 ≥25 ≥5 -
Casting. Normalization at 910-930 °C + vacation at 590-610 °C, air cooling (KCU-60)
≥650 ≥800 ≥12 ≥20 ≥5 -

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