Designation
| Name |
The value |
| Designation GOST Cyrillic |
15ХР |
| Designation GOST Latin |
15XP |
| Transliteration |
15HR |
| By chemical elements |
15CrB |
Description
15ХР steel is used: for the manufacture of gears, piston pins.
Note
Low alloy steel with slaborazvitoj core.
Steel structural quality. Stainless steel is marked 15ХРА.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
TU 14-1-3238-81, TU 14-1-2422-78, TU 14-1-3238-2006 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Fe |
B |
| TU 14-1-3238-81 |
0.12-0.17 |
≤0.025 |
≤0.025 |
0.4-0.7 |
0.7-1 |
0.17-0.37 |
Rest |
0.002-0.005 |
Fe is the basis.
According to TU 14-1-3238-81, the chemical composition is given for steel grade 15ХРА.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Bars and strip, hot-rolled, forged, kalibrovochnye with special surface finish on the other 14-1-3238-81. Quenching in oil or air at 880 °C Quenching in oil or air with 770-820 °C + Vacation at 180 °C, air cooling |
| 15 |
≥539 |
≥735 |
≥15 |
≥50 |
≥880 |
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 |
