Designation
| Name |
The value |
| Designation GOST Cyrillic |
9Х1 |
| Designation GOST Latin |
9X1 |
| Transliteration |
9H1 |
| By chemical elements |
9Cr1 |
Description
9KH1 steel is used: for the production work and backup rolls for cold rolling of metals; for the manufacture of work rolls for rail and structural steel, heavy section mill and wire cogging and section rolling mills for hot rolling of metals exposed to intense wear and tear and operating under conditions of minimal or moderate impact; supporting the composite of the rolls of sheet mills for hot rolling of metal; stamps, punches, cold heading dies, woodworking tools and other tools for various industries.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Sheets and strips |
В33 |
GOST 4405-75 |
| Bars and shapes |
В32 |
GOST 5950-2000, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88, TU 14-1-1271-75 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 24.952.01-89 |
| Processing of metals by pressure. Forgings |
В03 |
TU 14-1-1530-75 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5950-2000 |
0.8-0.95 |
≤0.03 |
≤0.03 |
0.15-0.45 |
1.4-1.7 |
0.25-0.45 |
≤0.4 |
Rest |
≤0.3 |
≤0.15 |
≤0.03 |
≤0.2 |
≤0.2 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Rolled steel. Hardening + Vacation at 500 °C |
|
≥830 |
≥880 |
≥12 |
≥37 |
≥700 |
| A sample with a diameter of 6 mm, length 30 mm, laminated and heat-treated. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s |
| - |
≥105 |
≥130 |
≥59 |
≥95 |
- |
| - |
≥87 |
≥120 |
≥60 |
≥95 |
- |
| - |
≥44 |
≥75 |
≥63 |
≥96 |
- |
| - |
≥33 |
≥51 |
≥67 |
≥98 |
- |
| - |
≥17 |
≥28 |
≥80 |
≥100 |
- |
| - |
≥11 |
≥19 |
≥73 |
≥100 |
- |
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 |
Technological properties
| Name |
The value |
| Weldability |
Steel is not used for welded structures. |
| Склонность к отпускной хрупкости |
Malosolone. |
| The temperature of forging |
Start - 1180 °C, the end - of 800 °C. the cooling of the workpiece cross-section up to 300 mm in the pit. |
| Flock-sensitive sensitivity |
Sensitive. |
| Machinability |
In the annealed condition with NV 187-196 and blower SB=680 MPa Kn TV.SPL.=0,95 Kn b.St.=0,60. |
