Steel 25ХГМНТБА (25ХГ2МНТБА)

Designation

Name The value
Designation GOST Cyrillic 25ХГМНТБА
Designation GOST Latin 25XGMHTBA
Transliteration 25HGMNTBA
By chemical elements 25CrMnMoНTiNb
Name The value
Designation GOST Cyrillic 25ХГ2МНТБА
Designation GOST Latin 25XG2MHTBA
Transliteration 25HG2MNTBA
By chemical elements 25CrMn2MoНTiNb

Description

25ХГМНТБА steel is used: for the production of hot-rolled steel 52−110 mm. in diameter, used in the manufacture of electro-welded anchor chains III and IIIA categories of strength.

Note

High quality structural steel.

Standards

Name Code Standards
Bars and shapes В22 GOST 2590-2006
Bars and shapes В32 TU 14-1-3050-80

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Ti Mo Nb
TU 14-1-3050-80 0.23-0.29 ≤0.025 ≤0.025 0.8-1.4 0.5-0.8 0.2-0.45 0.5-0.8 Rest 0.3 0.01-0.04 0.15-0.25 0.02-0.05
Fe is the basis.
According to TU 14-1-3050-80 the chemical stostav is given for steel 25HGMNTBA. At the request of the consumer, a rolling stock for chains of category IIIa made of steel grade 25ХГ2МНТБА is manufactured. In the steel grade 25HG2MNTBA content of Mn = 1.20-1.70%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Bars of g/K for circuits category III strength. Normalization of 950-980 °C, quenching in oil or water from 880-900 °C + vacation at 610-630 °C, air cooling
539 686 17 40 588
Bars of g/K for circuits as IIIA category of strength. Normalization 950-980 °C + quenching in oil or water from 880-900 °C + vacation at 600-640 °C, air cooling
588 735 17 40 588

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