9H2
Steel is not used for welded structures, prone to temper embrittlement. Flock sensitivity: sensitive. Temperature of critical points: Ac 1 = 756, Ac 3 (Ac m) = 783 .
operating and back-up rolls and two four-high stand sheet mills, cold rolling metal. Workers and forged supporting rolls of sheet mills for hot rolling of metals.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Tool steel |
Roll tool steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ni, % |
P, % |
C, % |
S, % |
|---|
| OST 24.013.20 - 0 |
95.19–97 |
0.25–0.5 |
0.2–0.7 |
1.7–2.1 |
< 0.5 |
< 0.03 |
0.85–0.95 |
< 0.03 |
Information on suppliers
Technological Properties
| Weldability |
Flake Susceptibility |
Propensity to temper brittleness |
|---|
| Not applicable for welded structures |
sensitive |
inclined |
Critical point temperatures
| Ac1, K |
Ac3(Acm), K |
|---|
| 756 |
783 |
Analogues
| Germany |
USA |
France |
United Kingdom |
|---|
| 1.2067 |
L3 |
Y100C6 |
BL3 |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ni |
% |
Nickel |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
Designation of types of weldability
| Parameter |
Units of measurement |
Description |
| no limits |
|
Welding is performed without heating and without subsequent heat treatment |
| Boundedly welded |
|
Welding is possible with heating up to 100–120 °C and subsequent heat treatment |
| Difficult to weld |
|
For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing |
| Not applicable for welded structures |
|
|
Description of temperatures of critical points
| Parameter |
Units of measurement |
Description |
| Ac1 |
K |
|
| Ac3(Acm) |
K |
|