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Dungku
Dungku (Elateriospermum tapos)

Family: Euphorbiaceae

Common names: Dungku, Perah

Distributed in: Malaysia (Oceania and S.E. Asia)

Common uses: Flooring, Fuelwood, Handles: general, Heavy construction, Plywood, Posts, Railroad ties, Tool handles

Colors: the heart isReddish brown, Yellowand the sapwoodWhite to yellow, Yellow.The grain isWeak figure, the textureFine to mediumand the lusterLow

Natural durability: Susceptible to attack from termites (Isoptera), Susceptible to marine borer attack

Kiln Schedules: Drying (speed) is fast

Drying Defects: Slight surface checking, Slight twist/warp

Tree Identification: Bole/stem form is misshapen

Comments: General finishing qualities are rated as good

Blunting Effect: Blunting effect on machining is moderate

Boring: Difficult

Cutting Resistance: Cutting Resistance with dry wood is moderate

Planing: Planes well, to a good finish

Resistance to Impregnation: Heartwood is permeable

Response to hand tools: Easy to Work



  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 881 kg/m3
Bending Strength kg/cm2
Crushing Strength 705 955 kg/cm2
Hardness 1051 kg
Impact Strength 71 cm
Shearing Strength 177 kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 2 %
Weight 865 737 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Density 55 lbs/ft3
Hardness 2318 lbs
Impact Strength 28 inches
Maximum Crushing Strength 10035 13590 psi
Shearing Strength 2525 psi
Weight 54 46 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 4 %

Density (dry weight) = 53-60 lbs/cu. ft
Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Density (dry weight) = 46-52 lbs/cu. ft.
Density (dry weight) = >75 lbs/cu. ft
Density (dry weight) = 67-75 lbs/cu.ft
Density (dry weight) = 61-67 lbs/cu. ft
Toughness-Hammer drop (Impact Strength) = low
Shearing strength (parallel to grain) = medium
Shearing strength (parallel to grain) = high
Max. crushing strength = very high
Hardness (side grain) = hard

Browne, F.G.,1955,Forest Trees of Sarawak and Brunei and their Products.,Government Printing Office, Kuching, SarawakBurgess, P.F.,1966,Timbers of Sabah,Sabah Forest Record, no.6Desch, H.E.,1954,Manual of Malayan Timbers (2 vols,Malayan Forest Records,no.15Jackson, W.F.,1957,The Durability of Malayan Timbers,Malayan Forester,20,pp38-48Malaysian Timber Industry Board,1986,100 Malaysian Timbers,The Malaysian Timber Industry BoardThomas, A.V., Browne, F.G.,1950,Notes on Air-Seasoning of Timber in Malaya,Malayan Forester 13(4) pp214-23Thomas, A.V., Pillai, P.K.B.,1954,Shrinkage of Malayan timbers,Malayan Forester 17(4) pp208-9Whitmore, T.C.,1973,Tree Flora of Malaya A Manual for Foresters Volume 2,Forest Department Ministry of Primary Industries Malaysia
*Come interpretare i dati (manleva su eventuali imprecisioni)