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Rolls from SIMPLEX

SPHEROIDAL GRAPHITE (DUCTILE) IRON ROLLS

Spheroidal graphite rolls are structurally characterised by nodular graphites as against flake graphites in normal cast iron rolls.The presence of Nodular/Spheroidal form of graphite eliminates the notch sensivity of Cast Iron. S.G.Iron rolls are far superior to conventional Steel/Cast Iron Rolls due to the unique combination of superior strength, good resistance to wear, spalling and fire cracking.

PROPERTIES	BRAND NO.	HARDNESS SHORE	APPLICATION
Speroidal / nodular graphite in pearlite matrix. Moderate drop of Hardness within working zone Roll Cooling - Moderate	S.N.	H_S 40-50 H_S 50-60 H_S 60-70 H_S 70-75	40-50 50-60	Roughing stands of light and medium duty mills. Roughing stands of Wire Rod, section and structural mills Intermediate and finishing stands of heavy section mill, sheet bar and alloy steel flat mills.
Very little drop of Hardness within working Zone Bainitic matrix. Roll Cooling - Intensive			60-70	Finishing stands of medium section mills
U.T.S. - 40-60 Kgf/mm² Impact Strength - 0.20 - 0.50 Kg/cm²			70-75	Finishing stands of small sections. (rounds, wire rod etc.) Skelps and flats Rolling mills

INDEFINITE CHILL ROLLS

The matrix structure varies from fine Pearlite to bainite depending on the alloy addition. The graphite in structure is highly resistance to spalling and fire Cracking.

PROPERTIES	BRAND NO.	HARDNESS SHORE	APPLICATION
Evenly distributed carbides and finely divided graphites in a pearlitic to bainitic matrix. Moderate hardness drop within working zone.	S.I.C.	H_S 55-60 H_S 60-70 H_S 70-75	55-60	Finishing stands of medium and heavy section mills.
U.T.S. - 22-28 Kgf/mm² Impact Strength - 0.18 Kg/cm²max.			60-70	Finishing stands of medium section mills
Roll Cooling - Normal			70-75	Finishing stands of small sections mills

DOUBLE POURED ROLLS

Need to get optimum wear resistance on the working zone and toughness as a whole, led to the development of composite Rolls. Highly alloyed extremely hard shell alongwith soft tough grey or S.G. Iron core depending on the end use.

PROPERTIES	BRAND NO.	HARDNESS SHORE	APPLICATION
Shell Layer-finely divided graphites in matrix of Bainite.	SDP	H_S 75-85	Finishing and Internediate Stands of narrow & wide strip mills.
Core-Gry Iron /S.G. Iron, ensures good mechnaical properties and resistance to thermal & mechanical shocks. SHELL DEPTH - upto 60 mm (depending on Roll diameter) SHELL U.T.S. - 35-40 Kgf/mm² Impact Stregth - 0.18 Kgm/cm²max. CORE U.T.S. - 20-40 Kgf/mm²Impact Strength - 0.35 Kgm/ cm²max. Roll Cooling - Intensive			Finishing stands of Wire Rod, Small Section and Flat Rolling.
Shell Layer of white Iron and Core Grey Iron. Hardness drop in working zone - Negligible U.T.S. 20-25 Kgf/mm²Impact Strength - 0.18 Kgm/ cm²max. Roll Cooling - Moderate	SDP	H_S 65-75	Intermediate and Finishing Stands of Wire Rod, Small Sections, Flats, Skelps and Ribbed Bars Rolling.

CLEAR CHILL/ALLOY CHILL IRON ROLL

The structure consists of Cementite uniformly distributed in a matrix of Pearlite/Bainite depending on the alloy content. The chilled layer is backed by a Mottled Zone and Grey Iron Core.

PROPERTIES	BRAND NO.	HARDNESS SHORE	APPLICATION
White Iron working zone backed with small Mottled zone and graphite rich core.	S.C.C.	H_S 60-65	Intermediate stands of Wire Rod and Small section mills.
U.T.S. - 20-22 Kgf/mm² Impact Strength - 0.18 Kg/cm²max. Roll cooling - Normal			Hot sheet rolling mills
The Matrix Structure is Pearlitic or Bainitic depending on the Alloy content U.T.S. - 20-22 Kgf/mm² Impact Strength - 0.18 Kg/cm²max. Roll cooling - Normal	S.N.C	H_S 65-75	Finishing stands of Wire Rod and Small section mills. Narrow strip, skeip, Ribbed Bar and Flat mills.

NON-METALLURGICAL INDUSTRIES

Rolls for Rubber, Paper, Dyes & Pigments, Plastic and Food Processing Units are made of Clear Chill/Alloy Clear Chill Iron. The Chilled Layer Consists of Fine Pearlite / Bainite Matrix with uniform distribution of Cementite backed by a condensed mottle zone with soft graphite rice inner layer, imparts good thermal conductivity.

PROPERTIES	BRAND NO.	HARDNESS SHORE	APPLICATION
White Iron working zone backed with small mottled zone and graphite rich core. Hardness drop - Nil within chill zone of 10-20 mm U.T.S. - 20-22 Kgf/mm² Impact Strength - 0.18 Kg/cm²max.	S.R.M.	H_S 60-70	Rubber Mixing , Soap Flaking, Paint Mixing etc.
Chill depth upto - 30 mm Properties are similar to clear chill Iron Rolls	SCM		Rubber, Calender, Rubber reclaim, (Refiner, Flutted carcket & grinder) Food processing & Paper Mills etc.

FACILITIES

CASTINGS		QUALITY CONTROL
	20 tonne continuous sandmixer		Chemical Testing Lab with Spectrometer
	Casting Pit.		Mechanical Testing Lab
	17 tonne Arc Furnace		Microscope with Camera.
	2/3 tonne Induction Furnace		Ultrasonic Testing Facility
	Heat treatment Furnace		Hardness Tester.
	Shot Blasting machine		Dynamic Balancing Machine

DESCRIPTION	DISTANCE BETWEEN CENTER (m.m)	SWING OVER BED (m.m.)	SWING OVER CROSS (m.m)	Qnty.
Heavy duty Lathe with grinding attachment, Special key way cutting, BECO, Indian make	7000	1000	1000	3 Nos.
Roll turning lathe - British Make	5000	5000	4000	1 No.
Roll turning lathe - British Make	3000	2000	850	1 No.
Roll turning lathe - Indian Make	1200	1800	1000	4 Nos.
Lathe - German make	1000	5000	1400	1 No.
Lathe - American Tool	800	1100	6000	1 No.

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