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Dungon
Dungon (Tarrietia sylvatica)

Family:

Common names: Chan thip, Dungon, Lau tau, Mascalwood, Palonapin, Resak, Taungsagaing

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

Distribution overview: Distributed in the Philippine Islands, from Luzon (Cagayan to Albay), Mindoro, Samar, Masbate, Panay, and Mindanao (Misamia and Davao). It is common in dry primary forests at low and medium elevations.

Environment profile: Status has not been officially assessed

Tree size: Trunk diameter is 300-350 cm

Colors: the heart isDark chocolate , Reddish brownand the sapwoodPink to pale reddish brown , White.The grain isSometimes curly , the textureSmoothand the lusterNon-lustrous

Natural durability: Resistant to attack by marine borers, Sapwood is readily attacked by insects and decay fungi

Odor: No specific taste The wood has a peculiar odor similar to that of old leather

Drying Defects: Lumber should be piled carefully and heavily weighted to prevent warping

Ease of Drying: Thick Stock Requires Care

Comments: DepositsThe material is highly suitable for steam bent work where strength and durability are required.The wood is reported to often contain large masses of stony deposits in old knots and cracks in the heartTimber produced by Dungon is very similar to that from Dungon-late (Heritiera littoralis) in structure, color, density, and other physical characteristics.

Blunting Effect: Severe dulling effect on tool edges Dulling effect on tool edges is severe because the wood is tough and also because of abrasive deposits

Cutting Resistance: Easy to saw

Planing: Fairly Difficult to Very Difficult

Resistance to Impregnation: Permeable sapwood

Turning: Very Good to Excellent Results

Polishing: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density kg/m3
Bending Strength 878 1617 kg/cm2
Crushing Strength 120 178 kg/cm2
Hardness 1290 kg
Impact Strength cm
Shearing Strength 142 kg/cm2
Stiffness 112 156 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness 461 cm-kg
Static Bending 501 795 kg/cm2
Item Green Dry English
Bending Strength 12489 22999 psi
Crushing Strength 1714 2536 psi
Hardness 2846 lbs
Maximum Crushing Strength 6411 9520 psi
Shearing Strength 2021 psi
Static Bending 7136 11318 psi
Stiffness 1603 2230 1000 psi
Toughness 401 inch-lbs
Specific Gravity 0.79 0.82

Very hard
Bending strength in the air-dry condition (about 12 percent moisture content) is exceptionally high. It is far superior in strength to either Teak or Hard maple. It has superior properties in compression parallel to grain in the air-dry condition than Teak, White oak, or Hard maple. It is very hard - much harder than White oak, Hard maple, or Teak

Desch, H. E. 1954. Manual of Malayan Timbers - Volume II. Malayan Forest Records, No. 15. Malaysia Publishing House Ltd., Singapore.Lauricio, F. M., Bellosillo, S. B., The Mechanical and Related Properties of Philippine Woods, The Philippine Lumber Journal, 12(5):A-H.Reyes, L.J. 1938. Philippine Woods. Department of Agriculture and Commerce, Technical Bulletin 7, Commonwealth of the Philippines, Bureau of Printing, Manila.Schneider, E.E. 1916. Commercial Woods of the Philippines: Their Preparation and Uses. Bulletin No. 14. Department of the Interior, Bureau of Forestry, Manila, Philippines.
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