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Arjun
Arjun (Ehretia acuminata)

Family: Boraginaceae

Common names: Arjun, Australian silky ash, Brown cedar, Bual, Chillay, Churnwood, Kala-aja, Kalthanu, Koda, Kurkuria, Nalshuna, Narra, Pandayan, Panden, Punjlaurai, Punna, Punya, Punyan, Puran, Shaursi, Silky ash

Distributed in: Australia, Bhutan, Burma, India, Japan, Philippines (Oceania and S.E. Asia)

Common uses: Agricultural implements, Cabinetmaking, Flooring, Furniture, Heavy construction, Joinery, Light construction

Tree size: Tree height is 10-20 m

Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodSame as heartwood, White to yellow.The grain isInterlocked, the textureMediumand the lusterMedium

Natural durability: Perishable, Susceptible to attack from powder post (Lyctid & Bostrychid) beetles

LightInduced Color Change: Darker

Response to hand tools: Easy to machine



  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 641 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 %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Density 40 lbs/ft3
Weight 39 31 lbs/ft3

Density (dry weight) = 38-45 lbs/cu. ft.

Audas, J.W.,Native Trees of Australia,Whitcombe & Tombs PTY. LtdCause, M.L.; Rudder, E.J. and Kynaston, W.T.,1989,Queensland Timbers Their Nomenclature, Density, and Lyctid Susceptability,Queensland Department of Forestry, Technical Pamplet No.2Desch, H.E.,1948,The Ashes,Wood 13 (10) pp285-7Francis, W.D.,1951,Australian Rain-forest Trees,Commonwealth of Australia - Forestry and Timber BureauGamble, J.S.,1902,A Manual of Indian Timbers,Sampson Low, Marston & Co. London
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