Jatoba
Scientific name:
Hymenaea spp
Geographic origin:
South America, the Caribbean and the West Indies
Sapwood: Pink white.
Heartwood: Pink grey to reddish grey.
Fiber: Straight, occasionally slightly intertwined.
Grain: Thin to medium size
Characteristic defects: Growth tensions and petrean inlays
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Capacity of being impregnated
- Sapwood: Medium capacity of being impregnated
- Heartwood: Low capacity of being impregnated
Mechanical properties
- Resistance to static flexion 1,338 kg/cm2 &;8226; Elasticity module 180,000 kg/cm2
- Resistance to compression 750 kg/cm2
Mechanization
- Sawing process: ordinary difficulties arise from hardness and low abrasability
- Drying process: Medium to high speed. Low risk of deformation and crack formation.
- Planing process: Difficulties due to hardness, abrasability and risk of repelling on pieces of intertwined fibers. Slow mechanisation is recommended
- Gluing process: Tannins hamper proper adherence
- Nailing and screwing process: pre-drilling is recommended due to hardness
- Finish: no particular problems arise
Physical properties
- Apparent density at 12% humidity
- 950 kg/m3 very heavy wood
- Dimensional stability
- - Volumetric contraction coefficient
- 0.43 % variation from stable wood to nervous wood
- - Relation between contractions
- 1.9% tendency to deformity
- Hardness (Chaláis-Meudon) 8.5 very hard wood
Observations
