Steel 9KH1

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.