Thongbueng (Koompassia malaccensis)
Family: Leguminosae
Common names: Ampas, Bengaris, Berniung, Empas, Enggaris, Enggeris, Garis, Gemaris, Gembris, Gemeris, Goraci, Hampas, Impas, Inggeris, Kampas, Kayu batu, Kempas, Kempas angin, Kempas rawang, Kompas, Kumpas, Madang koran, Mengerih, Mengeris, Menggaris, Menggeris, Menggeris rawang, Menggeris talang, Menggris, Mengris, Ngeris, Ngeris abang, Njari, Nyari, Oempas, Pa, Pah, Paniasi, Sabanting, Tanggaris, Thongbeng, Thongbueng, Toealang ajam, Toemaling, Tumaling, Turturan batu, Umpas
Distributed in: Brunei, Indonesia, Malaysia, Thailand (Oceania and S.E. Asia)
Distribution overview: Thailand, Indonesia (Sumatra), the Riau Archipelago, Bangka, Belitung, Borneo Peninsular Malaysia, Sarawak and Sabah. Found in lowland forest, peat and freshwater swamp, occurring from sea-level up to 600 m.
Common uses: Agricultural implements, Bedroom suites, Boat building (general), Boxes and crates, Bridge construction, Building construction, Building materials, Cabin construction, Cabinetmaking, Chairs, Charcoal, Chests, Concealed parts (Furniture), Construction, Core Stock, Crossties, Desks, Dining-room furniture, Domestic flooring, Door, Dowell pins, Dowells, Drawer sides, Exterior trim & siding, Exterior uses, Factory construction, Factory flooring, Fine furniture, Floor lamps, Flooring, Flooring: commercial heavy traffic, Flooring: industrial heavy traffic, Fuelwood, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Heavy construction, Joinery (external): ground contact, Joinery, Kitchen cabinets, Light construction, Living-room suites, Marine construction, Mine timbers, Office furniture, Pallets, Paneling, Parquet flooring, Piling, Plywood corestock, Plywood, Poles, Posts, Radio - stereo - TV cabinets, Railroad ties, Roofing, Rustic furniture, Shingles, Sporting Goods, Stools, Structural work, Sub-flooring, Tables, Tool handles, Vats, Vehicle parts, Veneer: decorative, Wharf construction
Environment profile: Safe in its natural habitat
Tree size: Trunk diameter is 100-150 cm
Colors: the heart isReddish brown, Yellow to golden-yellow to orangeand the sapwoodWhite, White to yellow.The grain isWavy, the textureMedium coarse to coarseand the lusterModerately lustrous
Natural durability: Susceptible to attack from termites (Isoptera), Susceptible to insect attack
Odor: No specific smell or taste
LightInduced Color Change: Darker
Kiln Schedules: Kiln Drying Rate (in days) is rather slow
Kiln Drying Rate: Very slow
Drying Defects: Slight surface checking, Slight twist/warp
Ease of Drying: Variable results.
Tree Identification: Bole/stem form is straight
Comments: Abrasive Material Content - The wood contains abnormal veins of rock-hard tissue which may interfere with machining operationsCorrosive Properties - The wood is slightly acidic and may promote corrosion in some metals under moist conditions.
Blunting Effect: Blunting effect on machining is severe
Boring: Moderately easy
Carving: Fairly Difficult to Very Difficult
Cutting Resistance: Fairly Difficult to Very Difficult to saw
Mortising: Finishes well
Moulding: Fairly Difficult to Very Difficult
Movement in Service: Fairly Difficult to Very Difficult
Nailing: Nails hold poorly, Possible if prebored
Planing: Planes well, to a good finish
Resistance to Impregnation: Resistant sapwood
Resistance to Splitting: Poor
Response to hand tools: Fairly Difficult to Difficult to Work
Routing recessing: Fairly Difficult to Very Difficult
Sanding: Sanding properties are good after grain filling
Veneering qualities: Diifficult to veneer
Turning: Turns with moderate ease
Polishing: Satisfactory; Staining: Reacts with Iron to discolour wood;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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|
|
|
Item |
Green |
Dry |
Metric |
Specific Gravity |
0,64 |
0,76 |
|
Density |
|
881 |
kg/m3 |
Bending Strength |
868 |
1179 |
kg/cm2 |
Crushing Strength |
62 |
75 |
kg/cm2 |
Hardness |
|
815 |
kg |
Impact Strength |
116 |
142 |
cm |
Shearing Strength |
|
112 |
kg/cm2 |
Stiffness |
164 |
186 |
1000 kg/cm2 |
Tangential Shrinkage |
6 |
|
% |
Radial Shrinkage |
45 |
|
% |
Weight |
849 |
817 |
kg/m3 |
Maximum Load |
0,84 |
1,05 |
cm-kg/cm3 |
Toughness |
|
|
cm-kg |
Static Bending |
584 |
687 |
kg/cm2 |
|
| | | | Item | Green | Dry | English | Bending Strength | 12350 | 16773 | psi | Crushing Strength | 892 | 1068 | psi | Density | | 55 | lbs/ft3 | Hardness | | 1797 | lbs | Impact Strength | 46 | 56 | inches | Maximum Crushing Strength | 7485 | 9834 | psi | Shearing Strength | | 1598 | psi | Static Bending | 8310 | 9780 | psi | Stiffness | 2340 | 2655 | 1000 psi | Work to Maximum Load | 12 | 15 | inch-lbs/in3 | Specific Gravity | 0.64 | 0.76 | | Weight | 53 | 51 | lbs/ft3 | Radial Shrinkage | 4.5 | | % | Tangential Shrinkage | 6 | | % | Volumetric Shrinkage | 14 | | % | |
Density (dry weight) = 53 - 60 lbs/cu. ft. 0 Max. crushing strength = high 0 Modulus of Elasticity (stiffness) = high 0 Bending strength (MOR) = medium 0 Density (dry weight) = 61 - 67 lbs/cu. ft. 1 Density (dry weight) = 46-52 lbs/cu. ft. 1 Shrinkage, Tangential = very small Toughness- hammer drop (Impact Strength) = high Shearing strength (parallel to grain) = very low Hardness (side grain) = medium Shrinkage, Radial = very small Shrinkage, Tangential = moderate Shrinkage, Radial = small Shrinkage, Radial = fairly large Shearing strength (parallel to grain) = medium Toughness - hammer drop (Impact strength) = very high Modulus of Elasticity (stiffness) = very high Hardness (side grain) = hard Density (dry weight) = 67-75 lbs/cu. ft Bending strength (MOR) = high Shrinkage, Tangential = small
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