SENTANG (Azadirachta excelsa)
Nom commercial
Sentang
Nom scientifique (avec auteur)
Azadirachta excelsa (Jack) Jacobs
Famille
MELIACEAE
Noms communs (pays)
Bird`s-eye-kalantas (Philippines); Sentang; Maranggo (Philippines); Kayu bawang (Indonesia); Urian bawang (Indonesia); Limpaga (Sabah); Rang-gu (Sarawak)
Synonymes du nom scientifique (avec auteurs)
Melia excelsa Jack; Azadirachta integrifolia Merr.
DESCRIPTION DE L'ARBRE
Description botanique
It is a large deciduous tree up to 50 m tall. The bole is up to 125 cm in diameter, with no buttresses.
Habitat naturel
Sentang usually grows scattered in secondary forests. It is reported from the lowlands up to 350 m of altitude.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally wood semi-ring porous and/or ring porous. Vessels of two distinct diameter classes, wood not ring-porous. Colored deposits in heartwood vessels. Vessels per mm2 5 to 20. Simple perforation plates. Vessel-ray pits similar to int Prismatic crystals in non-chambered axial parenchyma cells. Over 9 cells per parenchyma strand. Axial parenchyma bands more than 3 cells wide. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with simple to minutely bordered pits.
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Vue macroscopique du bois (plan radiale)
-
Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood varies from pale reddish-brown to dark reddish-brown and distinctly demarcated from the yellowish-white, grayish-white or sometimes gray-pink sapwood.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
The grain is mostly interlocked.
Texture
The texture varies from medium to coarse.
Durabilité naturelle
The heartwood is rated as non-durable to moderately durable. The sapwood is susceptible to dry-wood termites, powder-post beetles and fungal attack.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
6
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.53
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.58
Retrait tangentiel total (saturé à 0%TH) (%)
7.5
Retrait radial total (saturé à 0%TH) (%)
4.5
Défauts dus au séchage
Drying Defects: Care is needed during seasoning, especially with the heavier timber, as backsawn boards tend to check. Kiln Schedules: Kiln drying of heavier grades of eucalyptus timber is only practicable in boards up to 25 mm in thickness. It is strongly recommended to air dry the wood to 30% moisture content prior to kiln drying.
Calendrier de séchage en séchoir recommandé
UK-A; US-T2-D4
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.7
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
958
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
99556
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
540
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
163
Dureté Janka (latérale) 12%TH (kgf)
409
OUVRABILITÉ
Coupe de placage de déroulage
This species can be used for lamination.
Placage tranche
This species can be used for lamination.
Usinage
Machining of this species is reported to be easy.
Rabotage
Planing operations are rather easy.
Moulurage
It is easy to mold.
Tournage
30
Perçage
Boring operations are rather easy.
Finissage
It has a good finishing.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, flooring, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, TURNING, PACKING, OTHER AND MUSICAL INSTRUMENTS, cigar boxes, matches
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Planchers
- 14 - Handbook of Hardwoods
Panneaux
- 18 - W3TROPICOS Missouri Botanical Garden
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Tournage
- 30 - Embassy of Honduras in Japan
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
AUTRES ET INSTRUMENTS DE MUSIQUE
- 63 - Madeiras do Brazil II
Cigares
- 68 - Contribucion al conocimiento de la resistencia mecanica de la madera de peumo
Allumette
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
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