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JELUTONG (Dyera costulata)
Trade Name
Jelutong
Scientific Name
Dyera costulata Hook. f.
Family
APOCYNACEAE
Common Names
Swamp jelutung; Lebuai; Jelutong-bukit; Djelutung; Hill Jelutong (United Kingdom); Hill Jelutong (United States of America); Pantung gunung (Indonesia); Melabuai (Indonesia); Jelutung bukit (Indonesia); Teen pet daeng (Thailand); Jelutong (Sabah); Jelutong bukit (France); Jelutong paya (France); Jelutong paya (United States of America); Jelutong (Spain); Jelutong paya (United Kingdom); Jelutong bukit (United States of America); Jelutong (Germany); Jelutong bukit (Netherlands); Jelutong bukit (United Kingdom); Jelutong (Italy); Andjaroetoeng (Sabah); Letoeng (Sabah); Pantoeng jelutong bukit (Sabah); Jelutong paya (Sabah); Jelutung (Indonesia); Jelutong (Malaysia); Melabuwai (Indonesia); Red and white jelutong (Singapore); Jelutong paya (Netherlands)
Description Of The Tree
Botanical Description
It is a large to very large tree, up to 65 m tall. The bole is branchless for up to 30 m, up to 250 cm in diameter, without buttresses.
Natural Habitat
Dyera costulata occurs in primary lowland or hill forests, in well drained locations, up to 300 m of altitude.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vestured pits. Vessels per mm2 5 to 20. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits small, 7 micras or less. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with distinctly bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Odor
It has no taste, but slight odor present.
Color
The sapwood has no distinct color, the heartwood is pale yellow, tends to darken on exposure.
COLOR INDEX (1=Black, 7=Light yellow,white)
7
Grain
The grain is usually straight.
Texture
The texture of the wood is fine.
Luster
It shows a lustrous surface if planed.
Natural Durability
It is perishable, highly prone to blue stain.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Resistance To Impregnation
Impregnation with preservative substances is reported to be good.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.41
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.44
Total shrinkage Tangential (Saturated to 0%MC) (%)
7.3
Total shrinkage Radial (Saturated to 0%MC) (%)
3.4
Recommended Dry Kiln Schedule
UK-H; US-T10-D4S
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.2
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
476
Stiffness (MOE) 12%MC (kgf/cm²)
77026
Compression parallel to fiber 12%MC (kgf/cm²)
263
Shear strength radial 12%MC (kgf/cm²)
57
Janka hardness (side) 12%MC (kgf)
126
Janka hardness (end grain) 12%MC (kgf)
128
Workability
Sawing
Sawing of this species is reported to be rather easy, but the saw-teeth may get clogged with latex.
Rotary Veneer Cutting
This species is reported to have good characteristics for lamination.
Sliced Veneer
This species is reported to have good characteristics for lamination.
Machining
Machining of this species is reported to be easy.
Planing
Planing operations are rather easy.
Moulding
Molding of this species is good to fair.
Turning
30
Boring
Boring of this species is fair.
Mortising
Mortising of this species is reported to be easy.
Nailing
This wood is easy to nail.
Gluing
Gluing behavior is reportedly good.
Sanding
It is easy to sand.
Finishing
Resin pockets can affect paint.
Staining
It is easy to stain.
Coatings
It paints and varnishes well.
Polishing
It has a good polishing.
Response To Hand Tools
The wood responds well to hand tools.
REFERENCED USES
End Uses Summary
FURNITURE AND CABINETS, PLYWOOD AND VENEER, cores, TURNING, cutlery, TOOLS, tool handles, PACKING, OTHER AND MUSICAL INSTRUMENTS, handicrafts, pencil, shoes, matches, moldings
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Cores
- 27 - Embassy of Brazil in Japan
Turning
- 30 - Embassy of Honduras in Japan
Knife Handles
- 33 - Embassy of Gabon in Japan
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Other & Musical Instruments
- 63 - Madeiras do Brazil II
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Pencils
- 67 - Maderas latinoamericanas. VIII, Calophyllum brasilense, Couratari panamensis, Dendropanax arboreum y Bombacopsis sessilis
Shoes
- 70 - Proprietes physiques et mecaniques des bois tropicaux de l`union francaise
Matches
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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