Properties
The shell is a high carbon alloy steel containing Cr,Mo,W,V and Nb.The Microstructure consists of complex carbides embedded in a tempered martensitic matrix.Control of the carbon and a complex heat treatment allows the optimization of wear resistance,thermal fatigue resistance and oxide film formation,whilst maintaining low residual stress values.
 
Chemical Analysis
|
Code |
HSC |
C |
Si |
Mn |
Ni |
Cr |
Mo |
V |
W |
|
HSS |
75~95 |
1.5/2.0 |
0.3/1.0 |
0.4/1.2 |
0.0/1.5 |
3.0/8.0 |
2.0/8.0 |
2.0/9.0 |
0.0/8.0 |
|
S-HSS |
75~95 |
0.6/1.2 |
0.8/1.5 |
0.5/1.0 |
0.2/1.2 |
3.0/9.0 |
2.0/5.0 |
0.4/3.0 |
0.0/3.0 |
Mechanical properties
|
properties |
Barrel |
Nick/corel – SG cast iron |
|
Tensile strength (N/mm2) |
≥760 |
≥760 |
|
Bending strength (N/mm2) |
770~1020 |
425~500 |
Microstructure
Tempered martensite + small percentage bainite + carbide
Application
Work rolls for roughing stands and front finishing stands of strip mill, work rolls for cold strip mill
|
