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Bilinga is a hard, durable African wood, valued worldwide for its structure and longevity. Its scientific name is Nauclea diderrichii, and it is found across West and Central Africa.
Bilinga wood ranges from bright golden yellow to orange brown, darkening with age. Its grain is straight or slightly wavy, with a medium to coarse texture. It is naturally resistant to termites and fungus, which makes it widely used in outdoor structures, bridges, decking, and waterside installations.
| Property | Details |
|---|---|
| Local Name | Bilinga |
| Scientific Name | Nauclea diderrichii |
| Origin | West and Central Africa — Ghana, Nigeria, Congo, Cameroon, etc. |
| Cultivation / Use in Bangladesh | Does not grow naturally in Bangladesh; imported. Used for heavy timber structures, decking, large furniture, and industry |
| Color | Light yellow to golden brown; parts darken to deep brown with age |
| Texture | Fine to medium grain, straight or slightly wavy; oily and smooth |
| Density | About 800–950 kg/m³ (air dry); very dense and heavy wood |
| Janka Hardness | ~ 1,800 – 2,000 lbf (~ 8,000 – 8,900 N) |
| Radial Shrinkage | ~ 3.0 – 3.5 % |
| Tangential Shrinkage | ~ 6.0 – 6.5 % |
| Crushing Strength | ~ 75 – 90 MPa (parallel to grain) |
| Weight | Extremely heavy and dense wood |
| Strength | Very strong, durable, and stable |
| Elasticity | Moderate; being very hard, it is somewhat less flexible |
| Moisture Tolerance | Good; resistant to moisture and water |
| Insect Resistance | Naturally resistant to termites and other insects |
| Uses | Heavy furniture, decking, large structures, industrial use |
| Harvesting Age | 40–60 years (natural forest) |
| Price Range | Approx. Tk 2,700 – 4,500 per CFT (depending on grade and import source) |
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