Steel 9KHS
Designation
| Name |
The value |
| Designation GOST Cyrillic |
9ХС |
| Designation GOST Latin |
9XC |
| Transliteration |
9HS |
| The chemical elements |
9CrС |
Description
9KHS steel is used: for the manufacture of drills, reamers, taps, dies, chasers, milling cutters, machine stampley, stamps for cold work; critical parts whose material must have high wear resistance, fatigue strength under bending, torsion, contact loading, and elastic properties.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Sheets and stripes |
В33 |
GOST 4405-75, TU 14-131-971-2001 |
| Sectional and shaped rolling |
В32 |
GOST 5950-2000, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-2307-78, TU 14-11-245-88, TU 14-1-1271-75 |
| Bulls. Blanks. Slabs |
В31 |
OST 24.952.01-89 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5950-2000 |
0.85-0.95 |
≤0.03 |
≤0.03 |
0.3-0.6 |
0.95-1.25 |
1.2-1.6 |
≤0.4 |
The rest |
≤0.3 |
≤0.15 |
≤0.03 |
≤0.2 |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
| Rolled steel in the delivery state |
|
≥445 |
≥790 |
≥26 |
≥54 |
≥390 |
- |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 20 mm/min strain Rate 0,007 1/C |
| - |
≥110 |
≥130 |
≥26 |
≥68 |
- |
- |
| Rolled steel. Isothermal annealing of 790-810 °C. the Temperature of isothermal aging 710 °C. |
|
295-390 |
590-690 |
- |
50-60 |
- |
197-241 |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 20 mm/min strain Rate 0,007 1/C |
| - |
≥65 |
≥74 |
≥41 |
≥95 |
- |
- |
| - |
≥42 |
≥46 |
≥52 |
- |
- |
- |
| - |
≥20 |
≥31 |
≥54 |
- |
- |
- |
| - |
≥15 |
≥20 |
≥83 |
≥100 |
- |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
Physical characteristics
| Temperature |
Е, ГПа |
G, ГПа |
r, кг/м3 |
R, НОм · м |
| 0 |
190 |
79 |
7830 |
400 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Weldability |
does not apply to welded structures. A valid CCC. |
| Propensity to temper brittleness |
inclined |
| Forging temperature |
Start - 1180 °C, the end - of 800 °C. the cooling of the workpiece cross-section up to 200 mm in the well. |
| Flock-sensitive sensitivity |
not sensitive |
| Workability by cutting |
In hot-rolled condition with HB 221 Kn TV.SPL.=0.90 Kn b.St.=0.50 |
