Hypereutectoid Steel Rolls (IPE), Graphitic Steel Rolls (GSB), High Crhome (HCr)

TYPE ArMo	HARDNESS		CHEMICAL ANALYSIS						MECHANICAL PROPERTIES
TYPE ArMo	HB	ShC	C	Si	Mn	Cr	Ni	Mo	TENSILE STRENGHT (N/mm²)	BENDING STRENGHT (N/mm²)	MODULUS OF ELASTICITY (KN/mm²)
IPE	250 ∻ 400	33 ∻ 52	1.80 ∻ 2.10	0.20 ∻ 0.60	0.50 ∻ 1.10	0.50 ∻ 1.20	0.70 ∻ 1.50	0.20 ∻ 0.40	~ 750	~ 1600	~ 210
GSB	310 ∻ 400	40 ∻ 52	1.80 ∻ 2.10	0.80 ∻ 1.70	0.50 ∻ 1.10	0.50 ∻ 1.50	0.80 ∻ 1.70	0.20 ∻ 0.50	~ 750	~ 1400	~ 200
HCr	450 ∻ 550	64 ∻ 73	2.20 ∻ 2.60	0.30 ∻ 0.60	0.50 ∻ 0.80	13.00 ∻ 15.00	0.30 ∻ 0.60	0.40 ∻ 0.80	~ 550	~ 900	~ 230

Specifications

Steel base rolls have a carbon ratio ranging between 1,50 and 2,10% and are Cr-Ni-Mo alloyed. Chemical analysis and specific heat treatments give the material the high mechanical properties typical of steel and the wear resistance distinctive of cast iron. Hardness is constant in the whole working layer. The structure is made up of pearlic matrix and of small carbides. Graphitic steel rolls have a better thermal conductivity thanks to the presence of graphite nodules.

Applications

Steel base rolls are used for roughings, preparings, pre-finishing and finishings, for light, medium and heavy sections where high mechanical properties are required, in severe rolling conditions. Graphitic steel rolls are suitable above all for high thermal stresses.