Wengue
Scientific name:
Scientific name: Millettia laurentii De Wild.; M. stuhlmannii Taub.
Geographic origin:
Africa
- Sapwood: yellowish white.
- Heartwood: Dark grey to chocolate grey.
- Fiber: Straight.
- Grain: medium size to rough
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Capacity of being impregnated
- Sapwood: Medium capacity of being impregnated
- Heartwood: No capable of being impregnated
Mechanical properties
- Resistance to static flexion 1,800 kg/cm3
- Elasticity module 180,000 kg/cm3
- Resistance to compression 800 kg/cm3
Mechanization
- Sawing process: ordinary difficulties arise from hardness and abrasability
- Drying process: Slow. Low risk of deformation and high risk of crack formation.
- Planing process: Difficulties arise from hardness, abrasability.
- Gluing process: Tannins hamper proper adherence.
- Nailing and screwing process: pre-drilling is recommended due to hardness.
- Finish: No particular difficulties arise.
Physical properties
- Apparent density at 12% humidity 0.85 kg/m3 very heavy wood
- Density 450kg/m3
- Dimensional stability
- Volumetric contraction coefficient 0.54 % very nervous wood
- Relation between contractions 1.6% no tendency to deformity
- Hardness (Chaláis-Meudon) 8.1 very hard wood
Observations
- En serrar-la pot tenir un color groguenc, que s'enfosqueix l'endemà, obtenint el color marró fosc típic del wengué.
- És de les fustes més fosques que es comercialitzen i el preu és força elevat a causa de la seva escassetat.
