Designation
| Name |
The value |
| Designation GOST Cyrillic |
40ГР |
| Designation GOST Latin |
40GP |
| Transliteration |
40GR |
| By chemical elements |
40MnB |
| Name |
The value |
| Designation GOST Cyrillic |
40Г1Р |
| Designation GOST Latin |
40G1P |
| Transliteration |
40G1R |
| By chemical elements |
40Mn1B |
Description
40GR steel is used: for the manufacture after the improvement rivets for critical applications; after cementation, or cyanidation — piston pins, friction discs, finger springs, Cam rollers, bolts, nuts, screws, gears, worms, and other parts with high hardness and wear resistance of the surface; without the heat treatment as welded sub frames, shoes, scarves, fittings, bushings; track links of tractors.
Note
Structural steel high-quality manganese.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
GOST 4543-71, GOST 14955-77, TU 14-1-2118-77, TU 14-1-4949-91, TU 14-11-245-88, TU 14-136-367-2008 |
| Bars and shapes |
В22 |
GOST 5422-73, GOST 8319.0-75 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 3-1686-90, TU 14-1-4944-90 |
| Sheets and strips |
В23 |
TU 14-1-3389-82 |
| Sheets and strips |
В33 |
TU 14-105-539-90 |
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Rolled steel. Annealing in air from 860 °C to + Vacation at 600 °C, air cooling |
| 25 |
≥355 |
≥590 |
≥17 |
≥45 |
≥590 |
≥207 |
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 |
| HB |
Brinell hardness number |
