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Ateang
Ateang (Hopea ferrea)

Family: Dipterocarpaceae

Common names: Ateang, Atteang, Chegal batu, Chengal batu, Chengal laki, Ching chaap, Kian saai, Koki thmar, Lao tao, Mach, Malaut, Malut, Mulut, Roteang, Sang, Sang da, Sang dao, Takhian hin, Takhian nu, Takhian-hin

Distributed in: Cambodia, Laos, Malaysia, Thailand, Vietnam (Oceania and S.E. Asia)

Common uses: Heavy construction

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isReddish brown, Yellow to golden-yellow to orangeand the sapwoodPaler than heartwood, Red.The grain isStraight, the textureStripe (figure)

Natural durability: Very durable, Very durable

Kiln Drying Rate: Naturally dries quickly

Drying Defects: Distortion, Splitting

Ease of Drying: Reconditioning Treatement

Tree Identification: Bole/stem form is misshapen

Boring: Fairly easy to very easy

Carving: Poor to Very Poor Results

Cutting Resistance: Easy to saw

Mortising: Fairly Difficult to Very Difficult

Moulding: Fairly Difficult to Very Difficult

Movement in Service: Fairly Difficult to Very Difficult

Planing: Fairly Easy to Very Easy

Response to hand tools: Fairly Difficult to Difficult to Work

Sanding: Fairly Difficult to Very Difficult

Turning: Fairly Difficult to Very Difficult

Polishing: Fair to Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 833 kg/m3
Bending Strength 1212 1765 kg/cm2
Crushing Strength kg/cm2
Hardness 1192 kg
Impact Strength cm
Shearing Strength 177 kg/cm2
Stiffness 166 193 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 17241 25113 psi
Density 52 lbs/ft3
Hardness 2628 lbs
Shearing Strength 2525 psi
Stiffness 2373 2752 1000 psi
Weight 51 49 lbs/ft3

Density (dry weight) = 67-75 lbs/cu. ft.
Density (dry weight) = 61-67 lbs/cu. ft.
Density (dry weight) = 53-60 lbs/cu. ft.
Shearing strength (parallel to grain) = medium
Shearing strength (parallel to grain) = high
Modulus of Elasticity (stiffness) = very high
Modulus of Elasticity (stiffness) = high
Hardness (side grain) = very hard
Hardness (side grain) = hard
Bending strength (MOR) = very high
Bending strength (MOR) = high

Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Fundter, J.M.,1982,Names for Dipterocarp timbers and trees from Asia,Pudoc, Wageningen, NetherlandsI. Soerianegara and R.H.M.J. Lemmens (Editors,1993,Plant Resources of South-East Asia 5,(PROSEA, 1,Timber trees: Major commercial timbers,Pudoc Scientific Publishers, Wageningen 1993Sono, P.,1974,Merchantable Timbers of Thailand.,Forest Products Research Division, Royal Forest Department, Bangkok,,Thailand.
*Come interpretare i dati (manleva su eventuali imprecisioni)