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Acajou
Acajou (Khaya spp.)

Family: Meliaceae

Common names: Acajou, Afana, African mahogany, Appapyayi, Apurro, Benin mahogany, Big leaf mahogany, Dubini, Geduloha, Khaya, Krubua, Munyama, Odubin, Odupon, Okunmankra, Orro, Tacamaca rouge, Tiama tiama, Tiame tiame

Distributed in: Uganda (Africa)

Common uses: Boat building (general), Boxes and crates, Brush backs & handles, Carvings, Flooring, Furniture, Heavy construction, Joinery (external): ground contact, Joinery, Light construction, Millwork, Musical instruments, Paneling, Plywood, Sporting Goods, Tables, Turnery, Vehicle parts, Veneer: decorative

Environment profile: Vulnerable

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isRed, Yellowand the sapwoodWhite, Yellow.The grain isWeak figure, the textureMediumand the lusterMedium

Natural durability: Susceptible to insect attack, Very durable

Kiln Schedules: K=F US=T6D4/T3D3 Fr=6

Kiln Drying Rate: Very slow

Drying Defects: Moderate twist/warp, Splitting

Ease of Drying: Slowly

Tree Identification: Bole/stem form is buttressed

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Easy to saw

Gluing: Fairly Easy to Very Easy

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: Fairly Easy to Very Easy

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Variable qualities

Routing recessing: Fairly Easy to Very Easy

Sanding: Very Good to Excellent Results

Veneering qualities: Difficult to veneer

Screwing: Fairly Easy to Very Easy ; Turning: Fairly Easy to Very Easy

Polishing: Very Good to Excellent; Staining: Finish is generally satisfactory;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 512 kg/m3
Bending Strength 579 907 kg/cm2
Crushing Strength 283 456 kg/cm2
Hardness 280 kg
Impact Strength 50 cm
Shearing Strength 132 kg/cm2
Stiffness 89 103 1000 kg/cm2
Tangential Shrinkage 5 %
Radial Shrinkage 3 %
Weight 496 400 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 8244 12907 psi
Density 32 lbs/ft3
Hardness 618 lbs
Impact Strength 20 inches
Maximum Crushing Strength 4026 6494 psi
Shearing Strength 1883 psi
Stiffness 1273 1475 1000 psi
Weight 31 25 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 5 %
Volumetric Shrinkage 9 %

Max. crushing strength = medium 0
Modulus of Elasticity (stiffness) = low
Bending strength (MOR) = medium
Hardness (side grain) = very soft
Shrinkage, Volumetric = small
Shearing strength (parallel to grain) = medium
Shearing strength (parallel to grain) = low
Hardness (side grain) = soft
Density (dry weight) = 31-37 lbs/cu. ft.
Toughness-Hammer drop (Impact Strength) = very low
Bending strength (MOR) = low
Toughness-Hammer drop (Impact Strength) = low
Shrinkage, Tangential = small
Shrinkage, Radial = moderate
Modulus of Elasticity (stiffness) = very low
Shrinkage, Volumetric = moderate
Shrinkage, Volumetric = fairly large
Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Max. crushing strength = low
Max. crushing strength = high

Arkwright, P.,1957,Know your Timbers No.36 African Mahogany (Khaya spp.,Woodworking Industry,14(1, p39Bond, C.W.,1950,Colonial Timbers,Sir Issac Pitman & Sons Ltd. LondonCox, H.A.,1939,A Handbook of Empire Timbers,Forest Products Research Laboratory, Princes RisboroughForest Products Research Laboratory, U.K.,1945,A Handbook of Empire Timbers,Department of Scientific and Industrial Research Forest Products ResearchForest Products Research Laboratory, U.K.,1955,Kiln-Drying Schedules,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research Establishment Leaflet,No.42Greenway, P.J.,1947,Mahogany in East Africa 1 The Khayas,East African Agricultural Journal,13,pp8-14,[East African Agricultural,and Forestry Journal]Heck, G.E.,1937,Strength and related Properties of five foreign woods,F.P.L. Madison Rep., No.R1139Lamb, G.N.,1948,The Mahogany Book (7th Ed.,Mahogany Association Inc., Chicago.Rendle, B.J.,1969,World Timbers (3 Vols.,Ernest Benn Ltd. LondonSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TTimber Information Assoc. Ltd.,1947,Notes on East African Timbers,TRADA, Timber Information, No.28U.K. - Colonial Forest Resources Development Department,1939,British Colonial Timbers - Woods recommended for Various Uses,Colonial Forest Resources Development Department,LondonU.S.D.A. Forest Service,1952,Foreign Woods Imported into the U.S.,F.P.L. Madison Rep., No. R1903-12Uganda Forest Department,1954,Flooring Timbers,Uganda Forest Department Timber Leaflet,No.17Unwin, A.H.,1920,West African Forests and Forestry,T. Fisher Unwin Ltd. LondonWood, B., Calnan, D.,1976,Toxic Woods,British Journal of Dermat 94 Suppl. 13
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