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AramattaAramatta
Aramatta (Diplotropis purpurea)

Family: Leguminosae

Common names: Aji, Alcornoque, Aramatta, Araumatta, Baakia kiabici, Black sucupira, Botonallare, Coeur dehors, Congrio, Kabbes, Kiabici oudou, Konatopo, Levarte kabbes, Levorte kabbes, Mach, Ogoru, Olgoi, Peonia, Sapupira, Sapupira da varzea, Sucupipa, Sucupira, Sucupira assu, Sucupira-parda, Sucupira-preta, Supupira, Swarte kabbes, Taku, Tataboo, Tatabu, Zapan negro, Zwart kabbes, Zwarte kabbes

Distributed in: Brazil, French Guiana, Guyana, Suriname, Venezuela (Central America, Latin America)

Distribution overview: Uplands of the Guianas and in Para and Amazonas in Brazil. Fairly common in French Guiana, infrequent in Surinam and Guyana. Also in Venezuela.

Common uses: Agricultural implements, Bent Parts, Boat building, Boat building: decking, Boat building: framing, Bridge construction, Building construction, Building materials, Cabin construction, Cabinetmaking, Canoes, Chairs, Chests, Construction, Crossties, Desks, Dining-room furniture, Domestic flooring, Door, Drawer sides, Factory construction, Factory flooring, Fine furniture, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Handles, Hatracks, Heavy construction, Joinery, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Marine construction, Millwork, Mine timbers, Moldings, Office furniture, Paneling, Parquet flooring, Piling, Poles, Posts, Radio - stereo - TV cabinets, Railroad ties, Rustic furniture, Shafts/Handles, Shipbuilding, Stools, Structural work, Sub-flooring, Tool handles, Turnery, Utility furniture, Vehicle parts, Veneer: decorative, Wheel spokes, Wheels

Product sources: The ITTO reports that the species is a fairly important source of timber. The timber is exported regularly but in limited quantities.

Environment profile: Status unknown due to inadequate information

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isWaxy appearance, Yellowand the sapwoodWell defined, White to yellow.The grain isWavy, the textureMediumand the lusterPronounced

Natural durability: Susceptible to marine borer attack, Very durable

Odor: No specific smell or taste

Silica Content: Siliceous

Kiln Schedules: T7 - B3 (4/4) US

Drying Defects: Slight surface checking, Slight twist/warp

Ease of Drying: Thick Stock Requires Care

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good The wood is similar to the African species, Wenge (Millettia laurenti ) in many mechanical properties. It is superior to hickory (Carya ) and White oak (Quercus alba ).

Blunting Effect: Moderate

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Fairly Difficult to Very Difficult

Mortising: Fairly Easy to Very Easy

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Fairly Easy to Very Easy, Very Good to Excellent

Planing: Planes to a poor finish

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Moderate working qualities

Routing recessing: Fairly Easy to Very Easy

Sanding: Moderately difficult to work with ordinary tools

Veneering qualities: No drying degrade. Dries flat without splitting, There is slight to moderate drying degrade and the potential for buckles and splits

Steam bending: Poor to Very Poor Results

Screwing: Good screwing properties, Very Good to Excellent Results; Turning: Good results

Painting: Fairly Difficult to Very Difficult ; Polishing: Satisfactory; Staining: Fairly Difficult to Very Difficult ; Varnishing: Fairly Difficult to Very Difficult ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,7
Density 881 kg/m3
Bending Strength 1188 1571 kg/cm2
Crushing Strength 608 874 kg/cm2
Hardness 1004 kg
Impact Strength cm
Shearing Strength 167 kg/cm2
Stiffness 177 197 1000 kg/cm2
Tangential Shrinkage 7 %
Radial Shrinkage 4 %
Weight 817 721 kg/m3
Maximum Load cm-kg/cm3
Toughness 226 cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 16897 22352 psi
Density 55 lbs/ft3
Hardness 2215 lbs
Maximum Crushing Strength 8650 12445 psi
Shearing Strength 2388 psi
Stiffness 2529 2813 1000 psi
Toughness 197 inch-lbs
Specific Gravity 0.7
Weight 51 45 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 7 %
Volumetric Shrinkage 11 %

Hardness (side grain) = hard
Shrinkage, Volumetric = moderate
Shrinkage, Tangential = moderate
Bending strength (MOR) = high
Modulus of Elasticity (stiffness) = high
Shrinkage, Radial = fairly large
Shearing strength (parallel to grain) = medium
Density (dry weight) = 53-60 lbs/cu. ft
Bending strength (MOR) = very high
Shrinkage, Radial = moderate
Modulus of Elasticity (stiffness) = very high
Max. crushing strength = very high
Shrinkage, Volumetric = fairly large
Shrinkage, Tangential = very small
Shrinkage, Tangential = fairly large
Shrinkage, Radial = very small
Shrinkage, Radial = large
Shearing strength (parallel to grain) = high
Shrinkage, Tangential = small
Shrinkage, Tangential = large
Hardness (side grain) = medium
Density (dry weight) = 67-75 lbs/cu.ft
Density (dry weight) = 61-67 lbs/cu. ft
Density (dry weight) = 46-52 lbs/cu. ft.
Bending strength (MOR) = medium

Bena, P.,1960,Essences Forestieres de Guyane,Bureau Agricole et Forestier Guyanais GuyanaBerni, C.A., Bolza, E., Christensen, F.J.,1979,South American Timbers - The Characteristics, Properties and Uses of 190,Species,C.S.I.R.O Div. Building ResearchBoone, R.S., C.J. Kozlik, P.J. Bois, E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Hardwoods - Temperate and Tropical. USDA, Forest Service, General Technical Report FPL-GTR-57, Forest Products Laboratory, Madison, Wisconsin.Brazil -, I.B.D.F.,1980,Woods from Tucurui - characteristics and application,The Ag. Ministry Brazilian Institute for Forest DevelopmentCaribbean Commission,1952,Information on properties of timbers gathered by questionnaire and,collated in the secretariat of the Caribbean Commission including some,related data from technical literature.,Caribbean Commission, Port of Spain, Trinidad Caribbean Timbers, their,Utilization and Trade within the area CTUTA/1/Doc.7 + App.1-18Chichignoud, M., G. Deon, P. Detienne, B. Parant and P. Vantomme.1990.Tropical Timber Atlas of Latin America.International Tropical Timber Organization (ITTO, Centre Technique Forestier Tropical, Division of CIRAD, 45 bis Avenue de la Belle Gabrielle, Nogent-sur-Marne, CEDEX, France.Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Edmondson, C.H.,1949,Reaction of Woods from S.America and Caribbean areas to Marine Borers in,Hawaiian Waters,Caribbean Foresters,10(1,PP37-41Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood B. Wood Species from S. American Tropical,Moist Forests,F.A.O. Forestry DepartmentFanshawe, D.B.,1954,Forest Products of British Guiana Part 1 Principal Timbers,Forest Department British Guiana Forestry Bulletin (New Series 2nd,Edition,No.1Guna et al, S.R.D.,1945,Notes on British Guiana Timbers,The 'Daily Chronicle' Ltd. Printers,28PPHarrar, E.S.,1941,Some Physical Properties of Modern Cabinet Woods 1. Hardness,Tropical Woods,9(68,PP1-11Harrar, E.S.,1942,Some Physical Properties of Modern Cabinet Woods 3. Directional and Volume,Shrinkage,Tropical Woods,9(71, pp26-32Kribs, D.A.,1950,Commercial and Foreign Woods on the American Market (a manual to their,structure, identification, uses and distribution,U.S.A. Penn. State College, Tropical Woods LaboratoryLongwood, F.R.,1962,Commercial Timbers of the Caribbean,U.S.A. Department of Agriculture, Agriculture Handbook,No.207Loureiro, A.A., Freitas da Silva, M.,1968,Catalogo das Madeiras da Amazonia (2 vols,Min. do Ultramar Belem BrasilPolak, A.M.,1992,Major Timber Trees of Guyana A Field Guide,The Tropenbos Foundation Wageningen, The NetherlandsRecord, S.J., Hess, R.W.,1943,Timbers of the New World,Yale University PressSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSallenave, P.,1964,Proprietes Physiques et Mecaniques des Bois Tropicaux (Premier Supplement,C.T.F.T. Publ.,no.23Slooten, H.J. van der,1970,Evaluation Study of eighteen Wood Species from Guyana for Veneer and,Plywood Manufacture,Forest Industries Development Survey FAO Report SF/GUY9 Tech. Report,No.13,U.N.D.P.Surinam Forest Service,1952,Surinam Timber - A Summary with brief descriptions of the main timber,species of Surinam,Surinam Forest ServiceTakahashi, A.,1975,Compilation of data on the Mechanical Properties of Foreign Woods (Part 2,Central and South America,Shimane University, Japan, Research Report on Foreign Wood No.4Teixeira, D. E., M. A. E. Santana and M. Rabelo de Souza.1988. Amazonian Timbers for the International Market.ITTO Technical Series 1.Brazilian Institute for Forestry Development, Brazil.Vink, A.T.,1965,Surinam Timbers,Surinam Forest Service Paramaribo,3rd rev. ed.Wangaard, F.F., et al,1954,Properties and Uses of Tropical Woods 4,Tropical Woods,14(99, pp1-187Wolcott, G.N.,1950,An Index to the Termite Resistance of Woods,Agricultural Experimental Station, University of Puerto Rico Bulletin,No.85Wood, B., Calnan, D.,1976,Toxic Woods,British Journal of Dermat 94 Suppl. 13
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