
Black box (Eucalyptus microcarpa)
Family: Myrtaceae
Common names: Black box, Green leaved box, Grey box, Gum topped box
Distributed in: Australia (Oceania and S.E. Asia)
Common uses: Fuelwood, Heavy construction, Poles, Posts, Railroad ties
Tree size: Trunk diameter is 150-200 cm
Colors: the heart isPurple, Redand the sapwoodWhite
.The grain isInterlocked, the textureMedium
Natural durability: Susceptible to insect attack, Very durable
Kiln Schedules: Dry at a slow speed
Kiln Drying Rate: Naturally dries slowly
Drying Defects: Distortion, No surface checking
Ease of Drying: Thick Stock Requires Care
Blunting Effect: Little
Boring: Fairly easy to very easy
Carving: Fairly Easy to Very Easy
Cutting Resistance: Easy to saw
Mortising: Fairly Easy to Very Easy
Moulding: Fairly Easy to Very Easy
Movement in Service: Fairly Easy to Very Easy
Planing: Very Good to Excellent
Resistance to Impregnation: Resistant sapwood
Response to hand tools: Fairly Difficult to Difficult to Work
Routing recessing: Fairly Easy to Very Easy
Turning: Fairly Easy to Very Easy
Painting: Very Good to Excellent; Polishing: Very Good to Excellent;
- 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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608 |
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 |
3 |
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% |
Weight |
897 |
592 |
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 | | 38 | lbs/ft3 | Weight | 56 | 37 | lbs/ft3 | Radial Shrinkage | 3 | | % | Tangential Shrinkage | 7 | | % | |
Shrinkage, Tangential = small Shrinkage, Tangential = moderate Shrinkage, Tangential = fairly large Shrinkage, Radial = very small Shrinkage, Radial = small Shrinkage, Radial = moderate Density (dry weight) = 61<
Anderson, R.H.,1947,The Trees of New South Wales,New South Wales Department of AgricultureBootle, K.R.,1971,The Commercial Timbers of New South Wales and their use,Angus & Robertson (publishers) PTY LtdCause, M.L., Et al,1974,The Nomenclature, Density and Lyctus - Susceptibility of Queensland,Timbers,Queensland Forestry Department Pamphlet 13Hall, N., Et al,1970,Forest Trees of Australia,Australian Government Publishing Service, CanberraSimpfendorfer, K.J.,1975,An Introduction to trees for South Eastern Australia,Inkata Press, Melbourne, AustraliaStreets, R.J.,1962,Exotic Forest Trees in the British Commonwealth,Clarendon Press Oxford
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