20KHGNTR Alloy structural steel

Steelun Designation of 20KHGNTR Alloy structural steel:

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

Description Steelun of 20KHGNTR Alloy structural steel:

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.

Steelun Standards of 20KHGNTR Alloy structural steel:

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 Steelun of 20KHGNTR Alloy structural steel:

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
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%.
According to TU 3-460-87, the chemical composition is given for steel grade 20ХГНТР “Select”. In the production of steel grade 20ХГНТР “Select”, an additive of easily oxidizing elements (titanium and calcium) is produced in the center gate (AS No. 981386). The permissible deviations from the requirements of the chemical composition in the finished rolled products, subject to the standards of mechanical properties and other requirements, TU 3-460-87 should not exceed the following values ​​(% mass): carbon ± 0.010%, manganese ± 0.050%, silicon ± 0.020% , chromium ± 0.020%, titanium ± 0.020%, sulfur +0.005%, and phosphorus +0.005%. At the request of the consumer, the steel is supplied with a mass fraction of sulfur up to 0.060%. In the steel, tungsten is allowed up to 0.10%, molybdenum to 0.10% and vanadium to 0.050%.

Steelun Mechanical properties of 20KHGNTR Alloy structural steel:

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 steelun of 20KHGNTR Alloy structural steel:

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

Steelun Technological properties of 20KHGNTR Alloy structural steel:

Name The value
The tendency to temper brittleness 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.

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