Designation
| Name |
The value |
| Designation GOST Cyrillic |
37ХН3А |
| Designation GOST Latin |
37XH3A |
| Transliteration |
37HN3A |
| By chemical elements |
37CrН3 |
Description
37ХН3А steel is used: for the production of gears, shafts, bushings, power studs, bolts, nuts, and other case parts, which are requirements of high strength, ductility and toughness of core and high surface hardness, working under shock loads and at low temperatures; for the manufacture of large heavy duty products heavy and power engineering.
Note
Structural steel high-quality stainless. Does not apply to welded structures. Not prone to temper embrittlement.
Standards
| Name |
Code |
Standards |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 1-92-156-90 |
| Bars and shapes |
В32 |
TU 14-1-950-74 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| TU 14-1-950-74 |
0.33-0.41 |
≤0.025 |
≤0.025 |
0.25-0.55 |
1.2-1.6 |
0.17-0.37 |
3-3.5 |
Rest |
≤0.25 |
≤0.05 |
≤0.03 |
≤0.15 |
≤0.2 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Bars and strip hot rolled and forged. Quenching in oil with 805-835 °C + Vacation at 525-575 °C, cooling in water or oil |
|
≥930 |
≥1080 |
≥10 |
≥50 |
≥690 |
321-388 |
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 |
