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. |