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African cordia
African cordia (Cordia millenii)

Family: Boraginaceae

Common names: African cordia, Akaboa, Aliiba, Cordia, Cordia d'Afrique, Ebais, Ebe, Ketumba, Mujugangoma, Mukebu, Mukumari, Mungoma, Mutumba, Omah, Omo, Omon, Sumba, West African cordia

Distributed in: Ivory Coast, Kenya, Nigeria, Uganda (Africa)

Common uses: Boat building (general), Cabinetmaking, Canoes, Furniture, Joinery, Musical instruments: percussion, Veneer: decorative

Environment profile: Vulnerable

Tree size: Tree height is 30-40 m

Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodPaler than heartwood .The grain isStriped figure, the textureUniformand the lusterLustrous

Natural durability: Resistant to wood staining fungal attack, Susceptible to insect attack

Silica Content: Siliceous

Kiln Schedules: UK=K US=T13C4S/T11D3S

Drying Defects: Slight twist/warp, Splitting

Ease of Drying: Reconditioning Treatement

Tree Identification: Bole/stem form is cylindrical

Comments: General finishing qualities are rated as good

Blunting Effect: High to severe

Boring: Fairly difficult to very difficult

Carving: Fairly Difficult to Very Difficult

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Mortising: Finishes satisfactorily

Moulding: Fairly Difficult to Very Difficult

Movement in Service: Fairly Difficult to Very Difficult

Nailing: Fairly Difficult to Very Difficult, Holds satisfactorily

Planing: Planes to a satisfactory finish

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Easy to machine

Routing recessing: Satisfactory routing results

Screwing: Fairly Difficult to Very Difficult ; Turning: Fairly Difficult to Very Difficult

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

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 400 kg/m3
Bending Strength 485 761 kg/cm2
Crushing Strength 233 391 kg/cm2
Hardness 144 kg
Impact Strength cm
Shearing Strength 109 kg/cm2
Stiffness 71 84 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 2 %
Weight 400 336 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 6911 10833 psi
Density 25 lbs/ft3
Hardness 319 lbs
Maximum Crushing Strength 3324 5570 psi
Shearing Strength 1560 psi
Stiffness 1017 1199 1000 psi
Weight 25 21 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 4 %

Density (dry weight) = 23-30 lbs/cu. ft.
Bending strength (MOR) = low
Shrinkage, Tangential = very small
Modulus of Elasticity (stiffness) = very low
Max. crushing strength = medium
Hardness (side grain) = very soft
Shrinkage, Radial = very small
Shearing strength (parallel to grain) = low
Max. crushing strength = low
Bending strength (MOR) = medium
Shrinkage, Radial = small

Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFarmer, R.H.,1972,Handbook of Hardwoods,HMSOFrance - C.T.F.T.,1973,Investigations and Tests carried out on Tropical Timber by several,Research Laboratories,CTFTTack, C.H.,1969,Uganda Timbers,Govt. Printer UgandaTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Uganda Forest Department,1969,The Shrinkage of Some Ugandan Timbers,Uganda Forestry Department Timber Leaflet,No.47
*Come interpretare i dati (manleva su eventuali imprecisioni)