Cast Iron Castings

• Alloy Cast Iron Casting
These are cast iron based alloyed with Nickel, Chromium and Molybdenum having a matrix of pearlite and carbide with flake graphite. These rolls are used primarily for section Rolling. The material has very good thermal properties coupled with property of imparting good surface finish to the product. These rolls show rich and deep layer of chill with minimal fall in hardness. These rolls are also available in higher hardness range where the matrix is Bainitic instead of Pearlitic and are used in finishing stands of rod mill.

Hardness Shore C	C	Mn	Si	P	S	Ni	Cr	Mo	Uts kgmf/mm2
50-60	3.00 - 3.20	0.60-0.90	1.00-1.50	0.15 Max.	0.06 Max.	1.50-2.00	0.80-1.20	0.25-0.40	35-45
60-70	3.00 - 3.30	0.60-0.90	1.00-1.50	0.15 Max.	0.06 Max.	1.50-2.50	0.80-1.20	0.25-0.40	35-45
50-60	3.10 - 3.50	0.60-0.90	1.00-1.50	0.15 Max.	0.06 Max.	2.00-3.00	0.80-1.20	0.25-0.40	35-45

• Centrifugal Casting (Spun Cast)
These double poured rolls are cast by centrifugally casting the shell in a horizontal machine to develop a better quality. The centrifugally cast shell metal develops a finer & denser structure with very little drop in hardness and are more resistant to fire cracking & spelling compared to static-cast rolls. These rolls are also available in various hardness ranges and with both gray, ductile iron, Steel and Copper Alloys.

Hardness Shore C	C	Mn	Si	P	S	Ni	Cr	Mo	Uts kgmf/mm2
70-75	3.10 - 3.40	0.70-0.100	0.80-1.10	0.06 Max.	0.30 Max.	3.50-4.50	1.60-1.90	0.25-0.40	40-45
75-80	3.10 - 3.40	0.70-0.100	0.80-1.10	0.06 Max.	0.30 Max.	4.00-4.50	1.60-1.90	0.25-0.40	40-45
80-85	3.10 - 3.40	0.70-0.100	0.80-1.10	0.06 Max.	0.30 Max.	4.00-5.00	1.60-1.90	0.25-0.40	40-45
Grey Iron	3.00 - 3.40	0.50-0.80	1.40-1.80	0.10 Max.	0.15 Max.	0.5/1.00	0.40 Max.	-----	20-22
Ductile / Nodular Iron	3.00 - 3.40	0.50-0.80	1.40-1.80	0.15 Max.	0.05 Max.	0.5/1.00	0.40 Max.	-----	30-40

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