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East African Walnut
East African Walnut (Lovoa swynnertonii)

Family: Meliaceae

Common names: East African Walnut, Kilimanjaro mahogany, Kilimanjaro walnut, Msau, Msaur, Mukongoro, Mukuso, Mukusu, Mutunguru, Nkoba, Nnabulagala, Omukumbo

Distributed in: Kenya, Uganda (Africa)

Distribution overview: This species occurs in Kenya, Mozambique, Tanzania, Uganda, Zaire and Zimbabwe. It grows within wet evergreen forest. In Kenya, this species prefers sandy or loamy soils. In the Kwale district of Kenya this species is found in lowland forests dominated by Newtonia paucijuga, Milicia excelsa and Antiaris toxicaria and in the Meru district of Kenya it occurs in upland forest dominated by Newtonia buchanannii and Ocotea usambarensis. In Mozambique, this species is only known from the Garuso forests and in Zimbabwe is only known from the Chirinda forest where it is found on well-drained slopes of river banks.

Common uses: Agricultural implements, Boat building (general), Boxes and crates, Cabinetmaking, Canoes, Carvings, Flooring, Furniture, Heavy construction, Joinery, Musical instruments, Paneling, Plywood, Posts, Pulp/Paper products, Railroad ties, Sporting Goods, Tool handles, Turnery, Vehicle parts, Veneer: decorative

Colors: the heart isPurple, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isWavy, the textureMediumand the lusterLustrous

Natural durability: Susceptible to marine borer attack, Very durable

Odor: Has a taste

LightInduced Color Change: Darker

Kiln Schedules: Drying (speed) is fast

Ease of Drying: Thick Stock Requires Care

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Gluing: Difficult to glue

Mortising: Fairly Easy to Very Easy

Moulding: Good finishing

Movement in Service: Good finishing

Nailing: Difficult to nail, Easy to nail

Planing: Planes well, to a good finish

Resistance to Impregnation: Heartwood is resistant

Resistance to Splitting: Poor

Response to hand tools: Easy to machine

Routing recessing: Moderately easy

Sanding: Good sanding finish

Steam bending: Good

Screwing: Possible if prebored ; Turning: Fairly Easy to Very Easy

Polishing: Satisfactory; Staining: Finish is generally satisfactory ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 624 kg/m3
Bending Strength 542 849 kg/cm2
Crushing Strength 380 574 kg/cm2
Hardness 601 kg
Impact Strength 124 cm
Shearing Strength 125 kg/cm2
Stiffness 88 103 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 2 %
Weight 608 496 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 7711 12078 psi
Density 39 lbs/ft3
Hardness 1326 lbs
Impact Strength 49 inches
Maximum Crushing Strength 5408 8171 psi
Shearing Strength 1789 psi
Stiffness 1264 1472 1000 psi
Weight 38 31 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 5 %

Density (dry weight) = 38-45 lbs/cu. ft.
Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Toughness-Hammer drop (Impact Strength) = high
Shrinkage, Volumetric = small
Shrinkage, Radial = small
Shearing strength (parallel to grain) = very low
Modulus of Elasticity (stiffness) = very low
Hardness (side grain) = soft
Hardness (side grain) = medium
Density (dry weight) = 46-52 lbs/cu. ft.
Density (dry weight) = 31-37 lbs/cu. ft.
Bending strength (MOR) = medium
Bending strength (MOR) = low
Toughness-Hammer drop (Impact Strength) = medium
Shrinkage, Volumetric = moderate
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = very high
Shearing strength (parallel to grain) = medium
Modulus of Elasticity (stiffness) = medium
Modulus of Elasticity (stiffness) = low

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBrenan, J.P.M., Greenway, P.J.,1949,Check-lists of the Forest Trees and Shrubs of the British Empire,Imperial Forestry Institute, Oxford No.5 Tanganyika Territories Part 2Bryce, J.M.,1967,Commercial Timbers of Tanzania,Tanzanian Forestry Division Util. Sec. MoshiEggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaMcCoy-Hill, M.,1957,Timbers of Tanganyika - Ngambo, Mpande, East African Walnut and Candelabra,Tree,Timber Technology,65(2219,pp467Patterson, D.N.,1963,The strength of Kenya timbers, their derivation and application,Kenya Forestry Department Research Bulletin,No.23Tack, C.H.,1969,Uganda Timbers,Govt. Printer UgandaUganda Forest Department,1958,Mukusu (Lovoa swynnertonii,Tanzania Forest Dep. Util. Sec. Moshi Timber Leaflet,No.34Uganda Forest Department,1969,The Shrinkage of Some Ugandan Timbers,Uganda Forestry Department Timber Leaflet,No.47Wimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya
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