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Ditta 5
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Ditta 1
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AmboraAmbora
Ambora (Tambourissa thouvenotii)

Family: Monimiaceae

Common names: Ambora

Distributed in: Madagascar (Africa)

Common uses: Boat building (general), Boxes and crates, Building materials, Carvings, Casks, Core Stock, Decorative veneer, Domestic flooring, Excelsior, Exterior trim & siding, Exterior uses, Figured veneer, Flooring, Furniture, Hardboards, Interior construction, Interior trim, Joinery, Light construction, Millwork, Moldings, Packing cases, Parquet flooring, Particleboard, Plywood, Shingles, Shipbuilding, Sub-flooring, Trimming, Turnery, Veneer, Wainscotting

Environment profile: Status has not been officially assessed

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isYellow, Yellowish tanand the sapwoodWhite, Yellow.The grain isInterlocked grain shows attractive figure , the textureMedium coarse and uniformand the lusterMedium

Natural durability: Susceptible to insect attack, Very durable

Odor: Pleasant odor that persists after material is converted

Kiln Drying Rate: Naturally dries slowly

Drying Defects: Severe twisting/warping, Splitting

Ease of Drying: Variable

Blunting Effect: Moderate

Boring: Very easy to impregnate with preservatives

Carving: Good results

Cutting Resistance: Material is very soft and saws easily

Gluing: Good gluing characteristics

Mortising: Mortise finishing is very good

Moulding: Very good moulding properties

Movement in Service: Very good moulding properties

Nailing: Good nailing properties, Pre-Boring Recommended

Planing: Very Good to Excellent

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Poorly

Routing recessing: Routing is easy

Sanding: The sanding finish is generally good

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Unsuitable

Screwing: Good screw holding properties, Pre-boring recommended; Turning: Very Good to Excellent Results

Polishing: Very Good to Excellent; Staining: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 512 kg/m3
Bending Strength 597 926 kg/cm2
Crushing Strength 272 465 kg/cm2
Hardness 144 kg
Impact Strength cm
Shearing Strength 117 kg/cm2
Stiffness 90 106 1000 kg/cm2
Tangential Shrinkage 8 %
Radial Shrinkage 4 %
Weight 496 400 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 8500 13181 psi
Density 32 lbs/ft3
Hardness 319 lbs
Maximum Crushing Strength 3873 6614 psi
Shearing Strength 1666 psi
Stiffness 1294 1519 1000 psi
Weight 31 25 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 8 %
Volumetric Shrinkage 11 %

Shrinkage, Tangential = moderate
Shrinkage, Radial = small
Shrinkage, Radial = moderate
Max. crushing strength = medium
Bending strength (MOR) = medium
Shrinkage, Volumetric = moderate
Shrinkage, Tangential = small
Shrinkage, Tangential = large
Shrinkage, Tangential = fairly large
Shrinkage, Radial = large
Shrinkage, Radial = fairly large
Hardness (side grain) = very soft
Density (dry weight) = 31-37 lbs/cu. ft.
Compression strength (parallel to grain) = high
Bending strength (MOR) = high
The bending strength of air-dried wood of the species is similar to that of Teak, which is considered to be strong. Strength in compression parallel to grain is in the high range. Other species in this range include Teak, White oak, and Hard maple.

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7
*Come interpretare i dati (manleva su eventuali imprecisioni)