Indefinite Chill Cast Iron Rolls (AS)

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)
ASCNM	350 ∻ 460	50 ∻ 65	2.90 ∻ 3.30	0.70 ∻ 1.50	0.70 ∻ 1.00	0.60 ∻ 1.30	1.00 ∻ 2.60	0.20 ∻ 0.50	~ 300	~ 500	~ 180
AS-4	460 ∻ 640	65 ∻ 82	3.20 ∻ 3.60	0.50 ∻ 1.10	0.40 ∻ 1.00	0.70 ∻ 1.50	1.80 ∻ 4.20	0.20 ∻ 0.50	~ 350	~ 600	~ 180

Specifications

The prensence of free graphite flakes in the working layer distinguishes indefinite chill cast iron rolls from clear chill cast iron rolls. Free graphite improves the elastic properties of the material, reduces the effect of specific rolling loads and favours heat exchange by increasing the resistance to thermal fatigue. The structure is also made up of cementite which icreases wear resistance, in a pearlitic or baintic/martensitic matrix. Rolls may be supplied as monobloc or as compound. When high hardness in the working layer and highly resistant core metal material to high rolling pressure is required the use of compound (double pored) rolls is recommended.

Applications

Indefinite chill cast iron rolls are used above all as pre-finishing and finishing for rods, flats, light and medium sections.