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Hyunja
Hyunja (Siphonodon celastrineus)

Family: Celastraceae

Common names: Hyunja, Myauk-okshit, Myaukokshit, Siphonodon, Woibaw

Distributed in: Burma, India, Indonesia, Malaysia, Papua New Guinea, Philippines, Thailand (Oceania and S.E. Asia)

Common uses: Heavy construction, Light construction, Poles

Tree size: Tree height is 40-50 m

Colors: the heart isOrange, Yellowand the sapwoodWhite, Yellow.The grain isStraight, the textureFineand the lusterMedium

Natural durability: Non-resistant to termites, Susceptible to insect attack

Kiln Drying Rate: Slow

Drying Defects: Checking, Distortion

Ease of Drying: Rapidly

Cutting Resistance: Moderate to saw

Mortising: Fairly Difficult to Very Difficult

Moulding: Fairly Difficult to Very Difficult

Movement in Service: Fairly Difficult to Very Difficult

Nailing: Pre-Boring Recommended, Very Good to Excellent

Planing: Fairly Difficult to Very Difficult

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Fairly Difficult to Difficult to Work

Turning: Fairly Difficult to Very Difficult


  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 753 kg/m3
Bending Strength kg/cm2
Crushing Strength kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 2 %
Weight 737 592 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Density 47 lbs/ft3
Weight 46 37 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 10 %

Shrinkage, Tangential = large
Shrinkage, Radial = very small
Density (dry weight) = 46-52 lbs/cu. ft.

Anon,1963,Indian Woods: Their Identification, Properties and uses. Vol.II Linaceae,to Moringaceae,Manager of Publications, Delhi, IndiaBolza, E.,1975,Properties and Uses of 175 Timber Species from Papua New Guinea and West,Irian,C.S.I.R.O. Div. Building Research Report,no.34Whitmore, T.C. (Ed.,1972,Tree Flora of Malaya A Manual for Foresters Volume 1,Forest Department Ministry of Agriculture and Lands Malaysia
*Come interpretare i dati (manleva su eventuali imprecisioni)