Alloy cast steel rolls are made from premium molten steel, employing a frequency conversion furnace and utilizing advanced casting and heat treatment technologies. Possessing elevated strength, exceptional resistance to thermal crack, toughness, and notable wear resistance, these rolls are well-suited for application in roughing and intermediate stands of section steel mills. Additionally, they are ideal for roughing stands of HSM and serving as back up rolls of hot strip mills. The metallographic structure of the roller body manifests as either pearlite or tempered sorbite.

Chemical Composition

Code	C	Si	Mn	Cr	Ni	Mo	M
AS50Ⅰ	0.45-0.55	0.20-0.70	0.50-1.00	0.80-1.50	0.30-0.80	0.20-0.70	-
AS65Ⅰ	0.60-0.70	0.20-0.70	0.50-1.00	0.80-1.50	0.20-0.70	0.20-0.70	-
AS75Ⅰ	0.70-0.80	0.20-0.70	0.70-1.20	0.80-1.50	≥0.50	0.20-0.70	-
AS80Ⅰ	0.75-0.85	0.20-0.70	0.70-1.20	0.80-1.50	0.80-1.50	0.30-0.80	≥0.20
AS90Ⅰ	0.85-0.95	0.20-0.70	0.70-1.20	0.80-1.50	0.50-1.00	0.20-0.70	-
Cr4	0.40-0.70	0.20-0.70	0.70-1.20	3.00-5.00	≥0.50	0.40-1.00	≥0.10

Technical Properties

Code	Hardness      HS	Tensile Strength Mpa	Dimension mm	Weight         kg	Alloy Phase Diagram
AS50Ⅰ	35-45	≥650	600~1600	1000~50000
AS65Ⅰ	35-45	≥650
AS75Ⅰ	35-50	≥700
AS80Ⅰ	40-50	≥700
AS90Ⅰ	40-55	≥700
Cr4	50-65	≥700