High Chromium Steel Rolls Enhanced High Chromium Steel Rolls
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.
SCrH72C Tempered Martensite with Secondary Chromium Carbides (x400)SCrH72C Tempered Martensite
| Roll Grade | Barrels Hardness (ShC) | C (%) | Si (%) | Mn (%) | Cr (%) | Ni (%) | Mo (%) | V+Nb (%) | Core Material Info |
|---|---|---|---|---|---|---|---|---|---|
| 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 |