Steel 25KHGNMT (25ХГНМТА)

Designation

Name The value
Designation GOST Cyrillic 25ХГНМТ
Designation GOST Latin 25XGHMT
Transliteration 25HGNMT
By chemical elements 25CrMnНMoTi
Name The value
Designation GOST Cyrillic 25ХГНМТА
Designation GOST Latin 25XGHMTA
Transliteration 25HGNMTA
By chemical elements 25CrMnНMoTi

Description

25KHGNMT steel is used: for the manufacture of parts of devices operating on friction; details of auxiliary units of machines and devices.

Note

Structural steel quality homomorphically with molybdenum and titanium.

Standards

Name Code Standards
Bars and shapes В32 GOST 4543-71, GOST 14955-77, TU 14-1-2118-77, TU 14-1-926-74, TU 14-11-245-88, 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 0.5-0.8 0.4-0.6 0.17-0.37 0.8-1.1 Rest ≤0.3 ≤0.05 0.04-0.09 0.4-0.5 ≤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, % KCU, kJ/m2
Rolled steel. Quenching in oil from 860 °C to + vacation at 190 °C, air cooling
25 ≥1080 ≥1180 ≥10 ≥40 ≥481

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