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Bainitic Nodular Cast Iron Rolls (SGA)
Alloy elements of Ni、Mn、Cr、Mo etc., are added to bainitic nodular cast iron rolls for obtaining acicular (bainite-martensite) matrix in its microstructure of these rolls. Its strength and toughnes are higher than Perlitic Nodular Cast Iron Rolls, wearability is also better than latter. These rolls can be produced by static casting and centrifugal casting.
Table.1 Chemical Composition %
| Symbol | C | Si | Mn | Cr | Ni | Mo |
| SGAⅠ | 2.90-3.60 | 1.20-2.20 | 0.20-0.80 | 0.20-1.00 | 3.01-3.50 | 0.50-1.00 |
| SGAⅡ | 2.90-3.60 | 1.00-2.00 | 0.20-0.80 | 0.30-1.50 | 3.51-4.50 | 0.50-1.00 |
Table.2 Prosperities&Application
| Symbol | Hardness HS |
Tensile Strength MPa |
Bending Strength MPa |
Dimension MM |
Unit N.W KGS |
Application |
| SGAⅠ | 55-78 | ≥350 | 600-800 | ￠300-1000 | 500-12000 | Finishing stands of small section mills, bar,rod and hot narrow strip mills,finishing stands of high speed wire mills |
| SGAⅡ | 60-80 | ≥350 | 600-800 |
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