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
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Item |
Green |
Dry |
Metric |
Specific Gravity |
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Density |
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641 |
kg/m3 |
Bending Strength |
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kg/cm2 |
Crushing Strength |
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kg/cm2 |
Hardness |
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kg |
Impact Strength |
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cm |
Shearing Strength |
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kg/cm2 |
Stiffness |
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1000 kg/cm2 |
Tangential Shrinkage |
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% |
Radial Shrinkage |
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% |
Weight |
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kg/m3 |
Maximum Load |
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cm-kg/cm3 |
Toughness |
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cm-kg |
Static Bending |
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kg/cm2 |
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 |  |  |  | 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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