Steel 25KHGM

Designation

Name The value
Designation GOST Cyrillic 25ХГМ
Designation GOST Latin 25XGM
Transliteration 25HGM
By chemical elements 25CrMnMo

Description

25KHGM steel is used: for the manufacture of gear wheels gear boxes.

Note

Structural steel quality chromatorgraphy.

Standards

Name Code Standards
Bars and shapes В32 GOST 4543-71, GOST 14955-77, TU 14-1-5414-2001, TU 14-1-2118-77, TU 14-1-3463-82, TU 14-11-245-88, TU 14-1-5228-93, TU 14-136-367-2008
Bars and shapes В22 GOST 8319.0-75
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
GOST 4543-71 0.23-0.29 ≤0.035 ≤0.035 0.9-1.2 0.9-1.2 0.17-0.37 ≤0.3 Rest ≤0.3 ≤0.05 ≤0.03 0.2-0.3 ≤0.2
Fe is the basis.
According to GOST 4543-71 the content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade steel: P≤0,025%; S≤0.015%; Сu≤0.25%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
Rolled steel. Quenching in oil from 860 °C to + Vacation at 200 °C, air cooling (longitudinal samples)
≤50 ≥1100 ≥1200 ≥10 ≥45

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

Technological properties

Name The value
Склонность к отпускной хрупкости Tend not.
Flock-sensitive sensitivity not sensitive.