Kaudamu (Myristica hypargyraea)
Family: Juglandaceae
Common names: Darah darah, Duguan, Kaudamu, Kumpang, Mutwinda, Penarahan, Tambolau
Distributed in: Fiji (Oceania and S.E. Asia)
Distribution overview: Various species in the Myristica genus are distributed in the Indo-Malayan region, Indonesia, the Philippines, and Western Pacific Islands.
Common uses: Balusters, Bedroom suites, Boxes and crates, Building construction, Building materials, Cabinetmaking, Casks, Chairs, Chests, Concealed parts (Furniture), Construction, Core Stock, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Factory flooring, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Hardboards, Hatracks, Interior construction, Joinery, Kitchen cabinets, Light construction, Living-room suites, Moldings, Office furniture, Packing cases, Plywood, Turnery, Veneer
Product sources: Kaudamu is the trade name of timber produced by four Myristica species that grow in Fiji. The species are difficult to separate and are often mixed and marketed together under one name.
Environment profile: Status has not been officially assessed
Tree size: Trunk diameter is 150-200 cm
Colors: the heart isPurple, Redand the sapwoodPink, Red.The grain isStraight, the textureUniformand the lusterMedium
Natural durability: Susceptible to insect attack, Very durable
Odor: No specific smell or taste
Kiln Schedules: T10 - D4S (4/4) U
Kiln Drying Rate: Naturally dries slowly
Drying Defects: Splitting, Surface checking and slight collapse are common
Ease of Drying: Special care required to prevent defects
Blunting Effect: Moderate
Boring: Fairly easy to very easy
Carving: Responds well to carving if tools are kept very sharp
Cutting Resistance: Low cutting resistance
Gluing: Fairly Easy to Very Easy
Mortising: Very Good to Excellent
Moulding: Yields clean surfaces
Movement in Service: Yields clean surfaces
Nailing: Tends to split during nailing, Very Good to Excellent
Planing: Yields smooth surfaces
Resistance to Impregnation: Resistant sapwood
Response to hand tools: Responds Readily
Routing recessing: Routs easily with ordinary hand tools
Sanding: Very Good to Excellent Results
Veneering qualities: Veneers easily, Veneers moderately easy
Steam bending: Fairly Easy to Very Easy
Screwing: Pre-boring recommended, Very Good to Excellent Results; Turning: Yields clean surfaces
Painting: Fairly Easy to Very Easy; Polishing: Very Good to Excellent; Staining: Very Good to Excellent; Varnishing: Fairly Easy to Very Easy;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
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Density |
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416 |
kg/m3 |
Bending Strength |
405 |
731 |
kg/cm2 |
Crushing Strength |
34 |
43 |
kg/cm2 |
Hardness |
|
329 |
kg |
Impact Strength |
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cm |
Shearing Strength |
|
100 |
kg/cm2 |
Stiffness |
92 |
97 |
1000 kg/cm2 |
Tangential Shrinkage |
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% |
Radial Shrinkage |
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% |
Weight |
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kg/m3 |
Maximum Load |
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cm-kg/cm3 |
Toughness |
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77 |
cm-kg |
Static Bending |
289 |
454 |
kg/cm2 |
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| | | | Item | Green | Dry | English | Bending Strength | 5767 | 10403 | psi | Crushing Strength | 485 | 617 | psi | Density | | 26 | lbs/ft3 | Hardness | | 727 | lbs | Maximum Crushing Strength | 2979 | 6625 | psi | Shearing Strength | | 1426 | psi | Static Bending | 4116 | 6468 | psi | Stiffness | 1313 | 1382 | 1000 psi | Toughness | | 67 | inch-lbs | Specific Gravity | 0.38 | 0.44 | | |
Compression strength (parallel to grain) = high Bending strength in the air-dried condition (about 12% moisture content) is medium, but lower than Mahogany, and much lower than White oak. Some familiar species with high crushing strength parallel to grain include Hard maple, Teak, and White oak. It is moderately hard and resistant to wearing and marring. The density is average, or medium.
Bolza, E., Kloot, N.H.,1972,The Mechanical Properties of 56 Fijian Timbers,Australia C.S.I.R.O. Division of Forest Products Technological Paper,No.,62Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Keating, W.G., Bolza, E.,1982,Characteristics properties and uses of timbers. South East Asia, Northern,Australia and the Pacific,C.S.I.R.O. Div. Chemical Technology,Inkata Press,1
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