Green wattle (Acacia decurrens)
Family: Leguminosae
Common names: Basboom, Black acacia, Black wattle, Green wattle, Swartwattel, Tan wattle, Wattle
Distributed in: Australia, Costa Rica, India, South Africa, Sri Lanka, United States (Africa, Central America, North America, Oceania and S.E. Asia)
Distribution overview: Originates from Australia (Qld. and NSW, though naturalized in Vic., Tas. and ACT), but has been introduced into other areas of the world.
Common uses: Barge fenders, Boxes and crates, Building materials, Chairs, Charcoal, Chemical derivatives, Chests, Concealed parts (Furniture), Cooperages, Desks, Dining-room furniture, Docks, Dockwork, Dowell pins, Dowells, Drawer sides, Fine furniture, Floor lamps, Flooring, Flooring: industrial heavy traffic, Fuelwood, Furniture , Furniture components, Furniture squares or stock, Furniture, Harbor work, Hatracks, Interior construction, Interior trim, Kitchen cabinets, Living-room suites, Marine construction, Millwork, Mine timbers, Naval architecture, Office furniture, Poles, Posts, Pulp/Paper products, Radio - stereo - TV cabinets, Raft floats, Rafts, Rustic furniture, Stools, Tables , Tool handles, Utility furniture, Wardrobes, Wharf construction
Environment profile: Seeds easily
A horticultural variety
Tree size: Tree height is 20-30 m
Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodDifferent than heartwood, White.The grain isOther figure, the textureMediumand the lusterMedium
Natural durability: Very durable, Very high natural resistance
Odor: No specific smell or taste
Kiln Schedules: Drying (speed) is fast
Kiln Drying Rate: Naturally dries slowly
Drying Defects: Slight twist/warp, Splitting
Ease of Drying: Thick Stock Requires Care
Boring: Fairly easy to very easy
Cutting Resistance: Easy to saw
Mortising: Mortising characteristics fair or medium
Nailing: Possible if prebored, Pre-Boring Recommended
Planing: May produce some torn grain
Resistance to Impregnation: Sapwood is permeable
Response to hand tools: Fairly Difficult to Difficult to Work
Screwing: Fairly Easy to Very Easy, Satisfactory screwing characteristics;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
|
|
|
Density |
|
737 |
kg/m3 |
Bending Strength |
790 |
1228 |
kg/cm2 |
Crushing Strength |
461 |
671 |
kg/cm2 |
Hardness |
|
752 |
kg |
Impact Strength |
|
137 |
cm |
Shearing Strength |
|
155 |
kg/cm2 |
Stiffness |
126 |
145 |
1000 kg/cm2 |
Tangential Shrinkage |
|
|
% |
Radial Shrinkage |
|
|
% |
Weight |
|
|
kg/m3 |
Maximum Load |
|
|
cm-kg/cm3 |
Toughness |
|
541 |
cm-kg |
Static Bending |
|
|
kg/cm2 |
|
 |  |  |  | Item | Green | Dry | English | Bending Strength | 11249 | 17470 | psi | Density | | 46 | lbs/ft3 | Hardness | | 1658 | lbs | Impact Strength | | 54 | inches | Maximum Crushing Strength | 6568 | 9550 | psi | Shearing Strength | | 2205 | psi | Stiffness | 1798 | 2074 | 1000 psi | Toughness | | 470 | inch-lbs | Weight | 45 | 37 | lbs/ft3 | |
Density (dry weight) = 46-52 lbs/cu. ft. 1 Max. crushing strength = high Hardness (side grain) = medium Shearing strength (parallel to grain) = medium Bending strength (MOR) = medium Modulus of Elasticity (stiffness) = medium Bending strength (MOR) = high Modulus of Elasticity (stiffness) = high Toughness-Hammer drop (Impact strength)= high Toughness (total work)= very high Modulus of Elasticity (stiffness) = low Max. crushing strength = medium Density (dry weight) = 38-45 lbs/cu. ft.
Banks, C.H., Schoeman, J.P., Otto, K.P.,1977,The Mechanical Properties of Timbers with particular reference to South,Africa,South African Forestry Research Institute Bulletin,(Ed.,Schoeman, J.P. 1973 & Otto K.P. 1976,No.48Banks, C.H.,1954,The Mechanical Properties of Timbers with Particular Reference to those,grown in the Union of South Africa,Journal of the South African Forestry Association,No. 24 pp.44-65,[South,African Forestry Journal]Bois, P.J.,1966,The Strength Properties of Tanzania Timbers,Tanzania Forest Div. Util. Sec. Moshi Tech. Note, No.35Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBolza, E., Kloot, N.H.,1963,The Mechanical Properties of 174 Australian Timbers,C.S.I.R.O. Division of Forest Products Technological Paper,No.25Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Dave Faison. Into the Woods. Personal Communication, 1993.E.H. Walker,1954,Important Trees of the Ryukyu Islands,United States Civil Administration of the Ryukyu Islands Special Bulletin,No. 3Farmer, R.H.,1972,Handbook of Hardwoods,HMSOGuha, S.R.D.,1969,Summary of Investigations on the suitability of Indigenous Broadleaved,woods for production of Sulphate pulps for writing and printing,Indian Forester,95(8,pp579-90Hartwig, G.L.F.,1967,Flooring Timber in S.Africa - Acacia mearnsii,The South African Builder 45(2) pp34-35Lavers, G.M.,1983,The Strength Properties of Timber (3rd ed. revised Moore G.L.,Forest Products Research Laboratory, Princes Risborough, Building Research,Establishment Report (formerly Bulletin No.50)Little, E.L.,1948,A Collection of Tree Specimens from Western Ecuador,Caribbean Forester,9(3,pp215-98Nation Research Council,1980,Firewood Crops Shrub and Tree Species for Energy Production,National Academy of Sciences, Washington D.C.Rao, K.R. and S.K. Purkayastha. 1972. Indian Woods - Their Identification, Properties and Uses, Volume III - Leguminosae to Combretaceae. Published by the Manager of Publications, Delhi, India.Scott, M.H.,1935,Weights of South African Growth Timbers,South African Department of Agriculture and Forestry Bulletin,No.145,Forest Products Institute, Forestry Series No.1Scott, M.H.,1953,Utilisation Notes on South African Timbers,South African Forestry Department Bulletin No.36South African Lumber Millers Assoc.,1969,Notes on some Commercially Available Hardwoods,S.A.L.M.A. Timber Info. Centre Timber Technical Guide,No.1Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Timber Development Association,1948,Some New Timbers and Their Uses No. 34,Timber Development Association Limited, London [TRADA]
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