JATOBA Family: Scientific name(s):
Commercial restriction:
Fabaceae-caesalpinioideae (angiosperm) Hymenaea courbail Hymenaea intermedia Hymenaea oblongifolia Hymenaea parvifolia no commercial restriction
WOOD DESCRIPTION
LOG DESCRIPTION
Color: red brown Sapwood: clearly demarcated Texture: medium Grain: straight or interlocked Interlocked Grain: slight Note: Slight internal stresses. The color can vary from purple brown to or orangey brown to red brown slightly veined.
Diameter: Thickness of Sapwood: Floats: Log Durability:
PHYSICAL PROPERTIES
MECHANICAL/ACOUSTIC
19 – 31 inches 1 – 4 inches no moderate (treatment recommended)
Physical and mechanical properties are based on mature heartwood specimens. These properties can vary greatly depending on origin and growth conditions. Mean Std. Dev. Mean Std. Dev. Specific Gravity*: Crushing Strength*: 0.94 0.13 14,068 psi 2,175 psi Janka Hardness (lbs): Static Bending Strength*: 2,690 23,206 psi 4,496 psi Volumetric Shrinkage: Modulus of Elasticity*: 0.59% 0.11% 3,402,585 psi 870,516 psi Total Tangential Shrinkage (TS): 7.5% 1.2% Total Radial Shrinkage (RS): Musical Quality Factor: 148.5 measured at 2888 Hz 3.9% 1.4% TS/RS Ratio: 1.9 Fiber Saturation Point: 23% *At 12% moisture content. Stability: moderately stable to stable
NATURAL DURABILITY AND TREATABILITY Fungi and termite resistance refers to end-uses under temperate climate. Except for special comments on sapwood, natural durability is based on mature heartwood. Sapwood must always be considered as non-durable against wood degrading agents. E.N. = Euro Norm Funghi (According to E.N. standards): class 2-3 – durable to moderately durable Dry Wood Borers: class D – durable (sapwood demarcated, risk limited to sapwood) Termites (According to E.N. standards): class M – moderately durable Treatability (according to E.N. standards): class 4 – not permeable Use class ensured by natural durability: class 3 – not in ground contact, outside Species covering the use class 5: no Note: This species is listed in the European standard NF EN 350-2.
REQUIREMENT OF A PRESERVATIVE TREATMENT Against dry wood borer attacks: In case of risk of temporary humidification: In case of risk of permanent humidification:
Overseas Hardwoods Company
does not require any preservative treatment does not require any preservative treatment use not recommended
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JATOBA
DRYING Drying Rate: normal Risk of Distortion: slight risk Risk of Casehardening: no Risk of Checking: slight risk Risk of Collapse: no Possible Drying Schedule: 4 Note: Initial air drying under cover prior to kiln drying is recommended. Risks of cracks more or less important according to specific gravity.
M.C. (%) Green 122 104 86 59
Temperature (ยบF) Dry-Bulb Wet-Bulb 107.6 102.2 118.4 109.4 118.4 109.4 118.4 109.4 129.2 114.8
Air Humidity (%) 179.6 165.2 165.2 165.2 145.4
This schedule is given for information only and is applicable to thickness lower or equal to 1.5 in. It must be used in compliance with the code of practice. For thickness from 1.5 to 3 in, the air relative humidity should be increased by 5% at each step. For thickness over 3 in, a 10% increase should be considered.
SAWING AND MACHINING
ASSEMBLING
Blunting Effect: fairly high Sawteeth Recommended: stellite tipped Cutting Tools: tungsten carbide Peeling: not recommended or without interest Slicing: good Note: due to hardness, the use of stellite is recommended for industrial production.
Nailing / screwing: good but pre boring necessary Gluing: correct (for interior only) Note: gluing must be done with care (very dense wood)
END-USES
MAIN LOCAL NAMES
Sculpture Interior paneling Cabinetwork (high class furniture) Flooring Musical instruments Exterior Joinery Heavy Carpentry Wood frame house Industrial or heavy flooring Arched goods Interior Joinery Cooperage Sliced veneer Stairs (inside) Turned goods Tool handles Hydraulic works Vehicle or container flooring Sleepers
Country Peru Colombia Brazil Venezuela
Overseas Hardwoods Company
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Local Name Azucar-huayo Algarrobo Jatai, Jutai, Jutai roxo, Jatoba, Jutai acu Algarrobo
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