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Bainitic Spheroidal Graphite Rolls

Alloy elements of Ni?Mn?Cr?Mo etc.are added to bainitic spheroidal graphite rolls for obtaining acicular(bainite-martensite)matrix in its microstructure of these rolls.Its strength and toughnes is higher than Perlitic Nodular Cast Iron Rolls,wearability is also better than latter.These rolls can be produced by static casting or centrifugal casting.

Chemical Composition %

Symbol	C	Si	Mn	Cr	Ni	Mo
SGA?	2.90-3.60	1.20-2.20	0.20-0.80	0.20-1.00	3.01-3.50	0.50-1.00
SGA?	2.90-3.60	1.00-2.00	0.20-0.80	0.30-1.50	3.51-4.50	0.50-1.00

Prosperities&Application

Symbol	Hardness HS	Tensile Strength MPa	Bending Strength MPa	Application
SGA?	55-78	=350	600-800	Finishing stands of small section mills, bar,rod and hot narrow strip mills,finishing stands of high speed wire mills
SGA?	60-80	=350	600-800