WENGé (Millettia laurentii)
Nombre comercial
Wengé
Nombre científico (con autor)
Millettia laurentii De Wild.
Familia
LEGUMINOSAE
Nombres Comunes
Wengè (France); Wengè (United Kingdom); Wengè (Germany); Wengè (Zaire); Wengè (Congo); Awoung (Cameroon); Tshikalakala; Otogo; Nsou-so; Nson-so; N`toka; N`gondou; Mukonde mutshi; Monkonge; Kiboto; Bwengu; Awong; Anong; Panga-panga (United Kingdom); Panga-panga (Germany); Panga-panga (France); Wenge (United Kingdom); Wenge (Germany); Wenge (France); Mpande (Tanzania); Jambire (Mozambique); Wenge (Zaire); Wenge (Congo)
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree reaches a height of 16 to 32 m. The bole is usually straight, unbuttressed. The trunk diameter attains 100 cm.
Hábitat natural
Millettia laurentii is found in semi-deciduous, sometimes in periodically inundated swampy forests. It is known or inferred that the harvesting of specimens from the wild for international trade has, or may have, a detrimental impact on the species by EI
Distribución natural
Central Africa and southern regions of Tanzania, Mozambique, also in the Republic of Congo.
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). White deposits in heartwood vessels. Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel- Axial parenchyma in thick bands. Axial parenchyma storied. Two cells per parenchyma strand. Axial parenchyma bands more than 3 cells wide. 4 to 10 rays per mm (medium). Rays storied. Rays 1 to 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Non-septate fibers. 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 sapwood is whitish, it has a thickness of 2 to 3 cm. The heartwood is yellowish brown toning down to purplish brown, with pink-brown thin stripes, it is clearly demarcated.
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
2
Grano
Straight; grain has no particular influence on drying, machining and finishing qualities.
Veta
The texture of the wood is frequently coarse.
Durabilidad Natural
Very durable to decay; without preservative treatment. This species is especially suited for all the uses with risks of permanent or long-lasting humidification. Resistant to termites attack. Heartwood is resistant to Lyctus attacks.
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
1
Internal growth stresses
No residual growth stresses are found.
Contenido de sílice
Silica Content: This timber is reported to have a negligible silica content. Silica contents over 0.05% may affect wood processing. Silica Value: 0.01
Dificultad para impregnar
Nearly impossible to treat with a too much low penetration of the preservative substances.
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.77
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.87
Contracción Tangencial Total (Saturado hasta anhidro) (%)
9.1
Contracción Radial Total (Saturado hasta anhidro) (%)
5.9
Defectos por secado
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of checks. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Calendario de Secado
FR-13
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
1.5
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
1464
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
214523
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
865
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
129
Cizallamiento radial CH12% (kgf/cm²)
118
Dureza Janka (lados) CH12% (kgf)
949
Dureza Janka (extremos) CH12% (kgf)
1003
TRABAJABILIDAD
Aserrado
Sawing of this species requires powerful equipment.
Corte de chapa rotativa
Suitable for slicing.
Chapa tranchada
Suitable for slicing.
Pérdida de filo_romado
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Maquinado general
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Cepillado
Rather difficult; special tools are needed.
Moldurado
Moderately easy; tools must be cautiously sharpened.
Torneado
30
Taladrado
Moderately easy; tools must be cautiously sharpened.
Escopleado, caja y espiga
Moderately easy; tools must be cautiously sharpened.
Clavado
Pre-boring is necessary.
Encolado
Difficult to glue because of high density.
Lijado
Easy to perform; it gives good results.
Sacar lustre
Needs pre-coating.
Facilidad para herramientas manuales
Working with hand tools is difficult.
Usos Reportados
USOS FINALES (RESUMEN)
HOUSING GENERAL, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, OTHER AND MUSICAL INSTRUMENTS, handicrafts
VIVIENDA GENERAL
- 10 - Silica in Timbers
Tablas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Pisos
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
Marcos
- 16 - Woods of the World
Peldaños
- 17 - Tree Conservation Database
Paneles
- 18 - W3TROPICOS Missouri Botanical Garden
Accesorios de madera
- 19 - Silica in Timbers
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Muebles finos
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Gabinetes
- 24 - Empire Timbers
TABLEROS Y CHAPAS
- 25 - Directory of Timber Trade Malaysia
chapa decorativa
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Torneado
- 30 - Embassy of Honduras in Japan
artículos torneados
- 31 - Embassy of Colombia in Japan
Artículos torneados
- 32 - Embassy of Cote d`Ivoire in Japan
mangos de cuchillos
- 33 - Embassy of Gabon in Japan
Hormas zapato
- 34 - Embassy of Indonesia in Japan
artesanía
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
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