Steel 12KH7G3SL

Designation

Name The value
Designation GOST Cyrillic 12Х7Г3СЛ
Designation GOST Latin 12X7G3CL
Transliteration 12H7G3SL
By chemical elements 12Cr7Mn3С

Description

12KH7G3SL steel is used: for the manufacture of castings for critical heavily loaded parts with wall thickness up to 100 mm, operating in conditions of static and dynamic loads.

Standards

Name Code Standards
Steel castings В82 GOST 977-88

Chemical composition

Standard C S P Mn Cr Si Fe
GOST 977-88 0.1-0.15 ≤0.02 ≤0.02 3-3.5 7-7.5 0.8-1.2 Rest
Fe is the basis.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Normalization at 940-960 °C + vacation at 650-720 °C, air cooling + tempering with 880-900 °C + vacation at 200-250 °C air cooling
100 ≥1079 ≥1324 ≥9 ≥40 ≥589

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
d5 Elongation after rupture
y The relative narrowing
KCU Toughness