Steel 20KHGNTR

Designation

Name The value
Designation GOST Cyrillic 20ХГНТР
Designation GOST Latin 20XGHTP
Transliteration 20HGNTR
By chemical elements 20CrMnНTiB

Description

20KHGNTR steel is used: for the production of frogs driveshafts vehicles; parts of the tractor «Kirovets» of steel grade 20KHGNTR select.

Note

Structural steel quality homomorphically with titanium and boron.

Standards

Name Code Standards
Bars and shapes В32 GOST 4543-71, GOST 14955-77, TU 3-460-87, TU 14-1-2118-77, TU 14-1-704-72, 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 B Ti Mo W
GOST 4543-71 0.18-0.24 ≤0.035 ≤0.035 0.8-1.1 0.4-0.7 0.17-0.37 0.4-0.7 Rest ≤0.3 ≤0.05 0.001-0.005 0.03-0.09 ≤0.15 ≤0.2
TU 3-460-87 0.2-0.25 ≤0.035 ≤0.035 0.85-1.1 0.5-0.7 0.17-0.37 0.4-0.7 Rest ≤0.3 - 0.001-0.004 0.03-0.08 - -

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % d y, % KCU, kJ/m2
Long products hot-rolled steel on the other 3-460-87. Quenching in oil from 850±15 °C + Vacation at 200±30 °C, cooling in oil
15 ≥1150 ≥1350 - ≥10 ≥50 ≥900
Rolled steel. Quenching in oil from 850 °C + Vacation at 200 °C, cooling in oil
15 ≥980 ≥1180 ≥9 - ≥50 ≥765

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
d Elongation after rupture
y The relative narrowing
KCU Toughness

Technological properties

Name The value
Склонность к отпускной хрупкости Inclined.
Flock-sensitive sensitivity not sensitive.
Macrostructure and pollution The macrostructure of the steel on the other 3-460-87 must comply with GOST 4543 for high-quality steel.
Particularities of production of goods Rolled round with a diameter 45-110 mm on THAT 3-460-87 comes in vysokoopasnye condition. Hardness vysokoopasnye rental shall not exceed 197 HB. Rolled round with a diameter of 30-45 mm and hire of square section are supplied without a specified hardness.