SENTANG (Azadirachta excelsa)
Nombre comercial
Sentang
Nombre científico (con autor)
Azadirachta excelsa (Jack) Jacobs
Familia
MELIACEAE
Nombres Comunes
Bird`s-eye-kalantas (Philippines); Sentang; Maranggo (Philippines); Kayu bawang (Indonesia); Urian bawang (Indonesia); Limpaga (Sabah); Rang-gu (Sarawak)
Nombres científicos sinónimos (con autores)
Melia excelsa Jack; Azadirachta integrifolia Merr.
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
It is a large deciduous tree up to 50 m tall. The bole is up to 125 cm in diameter, with no buttresses.
Hábitat natural
Sentang usually grows scattered in secondary forests. It is reported from the lowlands up to 350 m of altitude.
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
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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Foto macroscópica de la madera, plano radial
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Foto microscópica sección transversal de la madera
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Color
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.
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
5
Grano
The grain is mostly interlocked.
Veta
The texture varies from medium to coarse.
Durabilidad Natural
The heartwood is rated as non-durable to moderately durable. The sapwood is susceptible to dry-wood termites, powder-post beetles and fungal attack.
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
6
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.53
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.58
Contracción Tangencial Total (Saturado hasta anhidro) (%)
7.5
Contracción Radial Total (Saturado hasta anhidro) (%)
4.5
Defectos por secado
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.
Calendario de Secado
UK-A; US-T2-D4
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
1.7
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
958
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
99556
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
540
Cizallamiento radial CH12% (kgf/cm²)
163
Dureza Janka (lados) CH12% (kgf)
409
TRABAJABILIDAD
Corte de chapa rotativa
This species can be used for lamination.
Chapa tranchada
This species can be used for lamination.
Maquinado general
Machining of this species is reported to be easy.
Cepillado
Planing operations are rather easy.
Moldurado
It is easy to mold.
Torneado
30
Taladrado
Boring operations are rather easy.
Acabado
It has a good finishing.
Usos Reportados
USOS FINALES (RESUMEN)
HOUSING GENERAL, flooring, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, TURNING, PACKING, OTHER AND MUSICAL INSTRUMENTS, cigar boxes, matches
VIVIENDA GENERAL
- 10 - Silica in Timbers
Pisos
- 14 - Handbook of Hardwoods
Paneles
- 18 - W3TROPICOS Missouri Botanical Garden
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
TABLEROS Y CHAPAS
- 25 - Directory of Timber Trade Malaysia
Torneado
- 30 - Embassy of Honduras in Japan
PALLETS_EMBALAJES
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
OTROS E INSTRUMENTOS MUSICALES
- 63 - Madeiras do Brazil II
Caja para puros
- 68 - Contribucion al conocimiento de la resistencia mecanica de la madera de peumo
Cerillas
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
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