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Assumed, Wood Working Properties & Specifications
Rauli (N. procera)
Coigue (N. dombeyi)
Other Common Names: Anis, Coihue, Coyan, Hualo, Rauli, Roble Ruili (Chile), Coihue, Lengue, Nire, Robe (Argentina).
From 38 S. latitude northward along the Chilean coast and up the river valleys into the high cordilleras in northern Llanquihue on poor soils. Rauli: From the Province of Valparaiso to the Province of Valdivia, mostly on good soils.
May reach heights of 130 ft with trunk diameters usually 2 to 3 ft, occasionally 6 to 8 ft. Boles often clear to 60 ft.
General Characteristics: Heartwood varies from pale pinkish brown to reddish brown bright cherry red; sapwood often wide, light brown. Texture mostly fine and uniform Rauli has a tendency to ring porosity; without distinctive odor or taste; grain is straight; luster low to medium.
Weight: Basic specific gravity (ovendry weight/green volume) ranges from 0.45 to 0.53; air-dry density 34 to 40 pcf.
Moisture content Bending strength Modulus of elasticity Maximum crushing strength
(%) (Psi) (1,000 psi) (Psi)
Green (23) 7,500 1,220 3,550
12% 11,500 1,490 6,650
Green (16) 10,700 1,380 4,000
12% 17,400 1,830 8,800
Green (23) 8,100 1,170 3,980
12% 11,200 1,420 6,480
Janka side hardness 840 lb for green material, 990 lb at 12% moisture content.
Drying and Shrinkage:
Generally very difficult to dry with a pronounced tendency to distort and collapse. Kiln schedule T2-C2 is suggested for 4/4 stock and T2-C1 for 8/4 (Coigue). Dries rather slowly but well with little degrade (Rauli). Kiln schedule T6-D2 is suggested for 4/4 stock and T3-D1 for 8/4. Movement probably small (Rauli). Shrinkage green to ovendry: radial 3.5%; tangential 7.0% (Rauli).
Both species are easy to work and dress cleanly; fair to good steam-bending qualities; easy to glue and finish.
Heartwood durability variable. Soil-block tests of Coigue indicate low resistance to attack by decay fungi, but some references give a provisional durable to moderately durable rating.
Sapwood is reported to be permeable and heartwood rated as moderately resistant. Pressure-vacuum treatment of Coigue gave preservative salt penetrations of about 3 to 24 mm.
Uses: Furniture components, cabinet work, flooring, millwork,
cooperage, an all-purpose timber in Chile. Rauli is the preferred species.
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