https://www.tinvogroup.com/cast-iron-roll/alloy-ductile-cast-iron-roll.html
Designation of rolls
C
Si
Mn
P
S
Ni
Cr
Mo
Crmo indefinite chilled cast iron rolls
3.20~3.60
0.80~1.20
0.60~1.00
<0.20
<0.10
0.60~1.20
0.20~0.60
Nicrmo indefinite chilled cast iron rolls(II)
3.20~3.60
0.80~1.20
0.60~1.00
<0.20
<0.10
0.50~1.00
0.70~1.20
0.20~0.60
Nicrmo indefinite chilled cast iron rolls(II)
3.20~3.60
0.60~1.00
0.60~1.00
<0.20
<0.10
1.01~2.00
0.70~1.20
0.20~0.60
Nicrmo indefinite chilled iron rolls (III)
3.20~3.60
0.60~1.00
0.60~1.00
<0.20
<0.10
2.01~3.00
0.70~1.30
0.20~0.60
Less ...