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Abahungon
Abahungon (Shorea polysperma)

Family: Dipterocarpaceae

Common names: Abahungon, Adamoi, Adamon, Adandron, Adanroi, Adumoi, Alangao, Ayohan, Ayuhan, Ayuthan, Bagitan, Bagobahong, Bagong-bahong, Balabaccan mahogany, Balagaian, Balakbak, Balakbakan, Balsian, Bataan mahogany, Beko, Bunga, Chapui, Diga hungan, Digahungan, Ganda, Gangauan, Hapnit, Hillagasi, Illagasi, Kaliaan, Kalikasan, Kuela, Lauan, Lauan colorado, Lauan gangauan, Lauan-chapui, Lauan-gangauan, Letis, Lotis, Mag-orang, Magorang, Majau, Malagamat, Malagangao, Malagangao na itim, Malagiso, Malagniat, Malai-a, Malakayang, Malang, Malatangan, Manapayung, Manapog, Manasol, Manggachapoi, Manggachapui, Manili, Manpayug, Manpog, Mansal, Maratinta, Matanged, Mayaas, Mayapis, Merampu, Meranti pipijat, Merantimajau, Naitim, Palai, Palali, Panunsungan, Panunsungin, Red lauan, Selangan pelandok, Tagaui, Takoban-tabigion, Takuban, Takuban nga gangauan, Takugan nga ganguan, Tamo, Tamok, Tangile, Tanguile, Tiaong, Tugaui, Tulo, Tulu, Tumutugaui, Tutmutugaui

Distributed in: Brunei, Philippines (Oceania and S.E. Asia)

Common uses: Boat building (general), Boat building: planking, Cabinetmaking, Furniture, Joinery, Paneling, Plywood, Veneer

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isRed, Reddish brownand the sapwoodWell defined, White to yellow.The grain isRippled figure, the textureUniformand the lusterSlightly lustrous

Natural durability: Non-resistant to termites, Perishable

Odor: Has an odor

LightInduced Color Change: Darker

Kiln Schedules: Drying (speed) is fast

Drying Defects: Moderate twist/warp, Slight surface checking

Ease of Drying: Reconditioning Treatement

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Blunting Effect: High to severe

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Easy to glue

Mortising: Fairly Difficult to Very Difficult

Moulding: Fairly Difficult to Very Difficult

Movement in Service: Fairly Difficult to Very Difficult

Nailing: Poor to Very Poor , Pre-Boring Recommended

Planing: Fairly Difficult to Very Difficult

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Fairly Difficult to Difficult to Work

Routing recessing: Fairly Difficult to Very Difficult

Sanding: Fairly Easy to Very Easy

Veneering qualities: Suitable for peeling, There is slight to moderate drying degrade and the potential for buckles and splits

Screwing: Pre-boring recommended ; Turning: Fairly Difficult to Very Difficult

Polishing: Surface Preparation; Staining: Finish is generally good ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 576 kg/m3
Bending Strength 609 954 kg/cm2
Crushing Strength 275 449 kg/cm2
Hardness 451 kg
Impact Strength 55 cm
Shearing Strength 85 kg/cm2
Stiffness 122 141 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 4 %
Weight 560 432 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 8670 13570 psi
Density 36 lbs/ft3
Hardness 995 lbs
Impact Strength 22 inches
Maximum Crushing Strength 3916 6397 psi
Shearing Strength 1221 psi
Stiffness 1748 2018 1000 psi
Weight 35 27 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 8 %

Density (dry weight) = 38-45 lbs/cu. ft.
Density (dry weight) = 31-37 lbs/cu. ft.
Modulus of Elasticity (stiffness) = medium
Max. crushing strength = medium
Hardness (side grain) = soft
Bending strength (MOR) = medium
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = low
Density (dry weight) = 46-52 lbs/cu. ft.
Density (dry weight) = 23-30 lbs/cu. ft.
Toughness-Hammer drop (Impact Strength) = very low
Toughness-Hammer drop (Impact Strength) = low
Shrinkage, Tangential = moderate
Shrinkage, Tangential = fairly large
Modulus of Elasticity (stiffness) = high
Bending strength (MOR) = low

Ashton, P.S.,1964,A manual of the Dipterocarp trees of Brunei State,O.U.P. LondonBrown, W.H.,1969,Properties and uses of Tropical hardwoods in the United Kingdom. Part 1,Nonstructural properties and uses.,Conference on Tropical hardwoods SC-5/TN-5, Syracuse UniversityCortes, R.T.,1940,Impact bending properties of twelve Philippine Dipterocarps,Philippine Journal of Forestry 3(3) pp325-43Dale, I.R., Greenway, P.J.,1961,Kenya Trees and Shrubs,Buchanans Kenya Estates Ltd. Nairobi Hatchards LondonFundter, J.M.,1982,Names for Dipterocarp timbers and trees from Asia,Pudoc, Wageningen, NetherlandsHarrar, E.S.,1942,Some Physical Properties of Modern Cabinet Woods 3. Directional and Volume,Shrinkage,Tropical Woods,9(71, pp26-32I.U.F.R.O.,1973,Veneer Species of the World,Assembled at F.P.L. Madison on behalf of I.U.F.R.O. Working Party on,Slicing and Veneer CuttingKynoch, W., Norton, N.A.,1938,Mechanical Properties of certain tropical woods chiefly from S. America,School of Forestry and Conservation, University of Michigan Bulletin,No.7Lomibao, B.A.,1973,Guide to the identification of the woods of Philippine Dipterocarpaceae,Foxpride Digest 2(2) pp26-34Reyes, L.J.,1938,Philippine Woods,Commonwealth of the Philippines Department of Agriculture and Commerce,Technical Bulletin,No.7Tamesis, F., Aguilar, L.,1953,The 'Philippine mahogany' and other Dipterocarp woods,Philippine Department of Agriculture and Natural Research Popular Bulletin,No.44U.S.D.A. Forest Service,1974,Wood Handbook,U.S.A. Department of Agriculture, Forest Service Handbook,72
*Come interpretare i dati (manleva su eventuali imprecisioni)