How to Select an L & N Furnace

Locate your process in the following table, an X indicates that that furnace will do the job for you. Materials recommended for heat treating in these furnaces are shown in the material codes column (click on the Material Codes heading for a full listing of codes).

Maximum Furnace Temperature	Process	Steam	Carburizing	Nitriding	Tempering	<Click to view
1000C	Hardening		X			2, 3, 9
950C	Case Carburising		X			9, 12
	Carbon Restoration		X			3, 11
	Homogenous Carburising		X			9, 10
	Normalising		X			9, 10, 13
	Carbonitriding		X			9, 10
	Hardening		X			2, 3, 4, 12
	Annealing		X			2, 3, 4, 9, 10, 13
760C	Age Hardening		X		X	6, 7
	Tempering		X		X	1, 2, 3, 4, 9, 11, 12, 13
	Annealing		X		X	1, 2, 3, 4
650C	Steam Oxidizing	X				1, 2, 3, 10, 11, 12, 13
	Nitriding			X		1, 2, 3, 10, 21
	Stress Relieving		X			2, 4, 10, 13, 14, 17
	Solution Treating		X			17, 22
	Annealing	X	X		X	14, 15, 17, 20, 22, 23
	Tempering	X	X		X	1, 2, 3, 4, 9
	Age Hardening		X		X	16, 17

The L & N Family of Furnaces

L & N Steam Treatment Furnace
Forced-circulation heating with controlled temperature, and steam atmosphere. For heat treating wrought ferrous and non-ferrous metal parts and powdered iron parts.

L & N Carburizing Pit Furnace
Forced-circulation heating with controlled temperature and atmosphere carbon potential. For a wide variety of heat treating processes (such as carburizing, hardening, carbon restoration, and hoogenous carburizing) at high production rates.

L & N Nitriding Furnace
Forced-circulation heating with controlled temperature, time and flow of ammonia gas. For production nitriding to critical specifications. Also available in models which automate operation, and program control of temperature and atmosphere for conventional and Floe process cycles.

L & N Tempering Furnace
Forced-circulation heating with controlled temperature. For maximum temperatures to 650C (for tools), 760C (for production parts), and a special model for dense-load production parts to 760C. Also available in models for precision annealing of optical glass.