High chromium steel is similar to high Cr cast iron with lower carbon content of 1.0-1.8%.The lower carbon grades are true steel with no eutectic carbides and higher carbon
grades have some eutectic carbides.
Hi Chromium steel rolls are used in roughing stands of HSMs, Steckle Mills and some early finishing stands of Hot Strip Mills.
Enhanced High Chromium Steel Rolls are alloyed with Nb, V and W to improve the wear resistance.
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SCrH72C Tempered Martensite with Secondary Chromium Carbides (x400) |
SCrH72C Tempered Martensite with Secondary Chromium Carbides (x100) |
|
Roll Grade |
Barrels Hardness (ShC) |
C (%) |
Si (%) |
Mn (%) |
Cr (%) |
Ni (%) |
Mo (%) |
V+Nb (%) |
Composition Hardness and Mechanical Properties of CoreMaterial |
|
SCr H 68 C |
68 |
1.0-1.8 |
0.6-1.3 |
0.5-1.5 |
10-13 |
0.5-1.5 |
0.7-1.5 |
0.2-0.5 |
See core Material Info in link1 |
|
SCr H 72 C |
72 |
1.0-1.8 |
0.6-1.3 |
0.5-1.5 |
10-13 |
0.5-1.5 |
0.7-1.5 |
0.2-0.5 |
See core Material Info in link1 |
|
SCr H 76 C |
76 |
1.0-1.8 |
0.6-1.3 |
0.5-1.5 |
10-13 |
0.8-1.8 |
0.7-1.5 |
0.2-0.5 |
See core Material Info in link1 |
|
SCr AH 68 C |
68 |
1.0-1.8 |
0.6-1.3 |
0.5-1.5 |
10-13 |
0.8-1.8 |
0.7-1.5 |
0.5-1.5 |
See core Material Info in link1 |
|
SCr AH 72 C |
72 |
1.0-1.8 |
0.6-1.3 |
0.5-1.5 |
10-13 |
0.8-1.8 |
0.7-1.5 |
0.5-1.5 |
See core Material Info in link1 |
|
SCr AH 76 C |
76 |
1.0-1.8 |
0.6-1.3 |
0.5-1.5 |
10-13 |
0.8-1.8 |
1.0-1.7 |
0.5-1.5 |
See core Material Info in link1 |
Note: On request, other roll grades not specified in the table can be produced. Cores for compound rolls can be produced on request with Grey, Compact or Nodular cast iron.
