Iron Rolls
Nodular Iron: Nodular Iron materials have a toughness advantage over grain or chill iron grades. The Spheroidal shape of the graphite phase makes these rolls less sensitive to impact. Consequently, softer nodular iron is applied in heavy breakdown services while the harder grades are specified for intermediate and finishing stands.
| Nodular Iron Applications |
Grade / Hardness |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
Mg |
PNI 175-200 |
3.000 |
0.400 |
0.060 |
0.025 |
1.500 |
1.600 |
0.250 |
0.200 |
0.040 |
48-60 Sc / 600-678 Ld |
3.300 |
0.600 |
0.090 |
Max |
2.000 |
2.250 |
0.500 |
0.300 |
0.060 |
|
Application: |
Soft Nodular - Heavy section rolling and roughers; Some intermediate
|
Grade / Hardness |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
Mg |
PNI 225-250 |
3.000 |
0.400 |
0.060 |
0.025 |
1.500 |
2.000 |
0.400 |
0.200 |
0.040 |
60-66 Sc / 678-709 Ld |
3.300 |
0.600 |
0.090 |
Max |
1.700 |
2.500 |
0.600 |
0.300 |
0.060 |
|
Application: |
Intermediate Rolling - Wide range of medium and heavy sections
|
Grade / Hardness |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
Mg |
PNI 275 |
3.200 |
0.400 |
0.060 |
0.025 |
1.400 |
2.500 |
0.500 |
0.200 |
0.040 |
64-72 Sc / 699-738 Ld |
3.300 |
0.600 |
0.090 |
Max |
1.600 |
3.000 |
0.700 |
0.300 |
0.060 |
|
Application: |
Bar Mill Medium and Small Section Finishers, and Leader Stands. Good resistance to impact and thermal fatigue. Very good general purpose material from later Intermediate to Finisher Stands.
|
Grade / Hardness |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
Mg |
ANI 300 |
3.200 |
0.400 |
0.060 |
0.025 |
1.500 |
2.750 |
0.400 |
0.500 |
0.040 |
64-72 Sc / 699-738 Ld |
3.300 |
0.600 |
0.090 |
Max |
1.850 |
3.250 |
0.600 |
0.800 |
0.060 |
|
Application: |
Small to Medium Section Rolling, Bar Mill Finishers, Leaders, and Preleaders where higher wear resistance is required.
|
Grade / Hardness |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
Mg |
ANI 350 |
3.200 |
0.400 |
0.060 |
0.025 |
1.400 |
3.250 |
0.650 |
0.650 |
0.040 |
68-74 Sc / 719-747 Ld |
3.300 |
0.600 |
0.090 |
Max |
1.600 |
3.750 |
0.850 |
0.850 |
0.060 |
|
Application: |
Acicular Nodular - Extensively used in finishers where uniform hardness and wear qualities are expected
|
Grade / Hardness |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
Mg |
SDI 400 |
3.200 |
0.400 |
0.060 |
0.025 |
1.200 |
3.750 |
0.900 |
0.400 |
0.040 |
70-75 Sc / 729-752 Ld |
3.300 |
0.600 |
0.090 |
Max |
1.300 |
4.250 |
1.100 |
0.600 |
0.060 |
|
Application: |
Nodular Chill Iron - Exceptional wear qualities for light section finishing
|
Grade / Hardness |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
Mg |
HDI |
3.200 |
0.700 |
0.040 |
0.025 |
1.650 |
2.50 |
0.250 |
0.950 |
0.040 |
| |
3.300 |
0.800 |
0.060 |
Max |
1.850 |
3.500 |
Max |
1.050 |
0.060 |
|
Application: |
Heat Treated Ductile Iron – Tough cadbide free that responds well to heat treating. The result is a very good resistance to thermal fatique. HDI can be hardened to produce a deep bainitic structure. it may be softened to a spherodite or used in as-cast state. Good for roughed in passes then heat theated for deep uniform hardness. |
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