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Alianna-be
Alianna-be (Swartzia bannia)

Family: Caesalpiniaceae

Common names: Alianna-be, Bannia, Banya, Boco, Ebony, Ebony bania, Ijzerhart, Savanne ijzerhart, Savanneijzerhart, Shibalidanm

Distributed in: Brazil, French Guiana, Guyana, Netherlands, Suriname (Latin America, Oceania and S.E. Asia)

Common uses: Agricultural implements, Boat building: framing, Cabinetmaking, Carvings, Flooring, Flooring: industrial heavy traffic, Furniture, Handles: general, Heavy construction, Ladders, Mathematical instruments, Mine timbers, Musical instruments, Musical instruments: strings, Piling, Railroad ties, Tool handles, Toys, Turnery, Vehicle parts, Walking sticks, Wheel spokes

Environment profile: Rare

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isRed, Yellowand the sapwoodWhite to yellow, Yellow.The grain isStriped figure, the textureUniformand the lusterSlightly lustrous

Natural durability: Susceptible to marine borer attack, Very durable

Odor: Has an odor

Kiln Schedules: Drying (speed) is fast

Drying Defects: Slight spring/bow, Slight surface checking

Ease of Drying: Reconditioning Treatement

Tree Identification: Bole/stem form is not buttressed

Comments: General finishing qualities are rated as good

Blunting Effect: Little

Boring: Fairly difficult to very difficult

Carving: Fairly Easy to Very Easy

Cutting Resistance: Easy to saw

Gluing: Fairly Easy to Very Easy

Mortising: Poor to Very Poor

Moulding: Poor to Very Poor

Movement in Service: Poor to Very Poor

Nailing: Possible if prebored, Very Good to Excellent

Planing: Planes well, to a good finish

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Readily

Routing recessing: Fairly Easy to Very Easy

Sanding: Fairly Easy to Very Easy

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Fairly Easy to Very Easy

Screwing: Fairly Easy to Very Easy, Possible if prebored; Turning: Very Good to Excellent Results

Polishing: Very Good to Excellent; Staining: Very Good to Excellent; Varnishing: Fairly Easy to Very Easy;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 1009 kg/m3
Bending Strength 1298 1863 kg/cm2
Crushing Strength 632 869 kg/cm2
Hardness 1333 kg
Impact Strength cm
Shearing Strength 208 kg/cm2
Stiffness 171 199 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 4 %
Weight 993 929 kg/m3
Maximum Load 0,63 0,84 cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 18463 26499 psi
Density 63 lbs/ft3
Hardness 2940 lbs
Maximum Crushing Strength 8990 12374 psi
Shearing Strength 2960 psi
Stiffness 2441 2838 1000 psi
Work to Maximum Load 9 12 inch-lbs/in3
Weight 62 58 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 8 %

Density (dry weight) = >75 lbs/cu. ft.
Shrinkage, Tangential = moderate
Shrinkage, Radial = small
Shearing strength (parallel to grain) = high
Modulus of Elasticity (stiffness) = very high
Max. crushing strength = very high
Hardness (side grain) = very hard
Bending strength (MOR) = very high
Shrinkage, Radial = moderate
Modulus of Elasticity (stiffness) = high
Max. crushing strength = high
Bending strength (MOR) = high
Work to Maximum Load = low
Shrinkage, Tangential = small
Shrinkage, Tangential = large
Shrinkage, Tangential = fairly large
Shrinkage, Radial = large
Shrinkage, Radial = fairly large
Shearing strength (parallel to grain) = very high

Berni, 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 ResearchFanshawe, D.B.,1954,Forest Products of British Guiana Part 1 Principal Timbers,Forest Department British Guiana Forestry Bulletin (New Series 2nd,Edition,No.1Vink, A.T.,1965,Surinam Timbers,Surinam Forest Service Paramaribo,3rd rev. ed.Wangaard, F.F., W.L. Stern, and S.L. Goodrich. 1955. Tropical Woods - Properties and Uses of Tropical Woods, Volume V, No. 103. School of Forestry, Yale University, New Haven, Connecticut.
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