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Brown alder
Brown alder (Ackama paniculata)

Family: Cunoniaceae

Common names: Brown alder, Corkwood, Pencil cedar, Rose alder, Rose-leaf marara, Sugar bark

Distributed in: Australia, United States (North America, Oceania and S.E. Asia)

Common uses: Boxes and crates, Brush backs & handles, Cabinetmaking, Flooring, Flooring: industrial heavy traffic, Furniture, Heavy construction, Joinery, Light construction, Millwork, Paneling, Plywood, Plywood: veneer (marine), Turnery, Veneer: decorative

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isRed, Reddish brownand the sapwoodWhite, Yellow.The grain isWeak figure, the textureMedium

Natural durability: Susceptible to attack from powder post (Lyctid & Bostrychid) beetles, Susceptible to insect attack

Kiln Schedules: Dry at a slow speed

Drying Defects: No surface checking, Slight surface checking

Tree Identification: Bole/stem form is buttressed

Comments: General finishing qualities are rated as good

Cutting Resistance: Cutting Resistance with dry wood is easy

Gluing: Fairly Easy to Very Easy

Nailing: Holds nails well, Very Good to Excellent

Planing: Easy to plane

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Moderate working qualities

Routing recessing: Routing is difficult

Veneering qualities: Veneers easily, Veneers moderately easy

Screwing: Fair to Good Results, Very Good to Excellent Results; Turning: Easy to turn

Staining: Finish is generally satisfactory ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 544 kg/m3
Bending Strength 429 674 kg/cm2
Crushing Strength 275 449 kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 95 110 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 528 416 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 6111 9589 psi
Density 34 lbs/ft3
Maximum Crushing Strength 3916 6397 psi
Stiffness 1358 1568 1000 psi
Weight 33 26 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 9 %

Density (dry weight) = 31-37 lbs/cu. ft.
Modulus of Elasticity (stiffness) = low
Max. crushing strength = medium
Density (dry weight) = 38-45 lbs/cu. ft.
Bending strength (MOR) = low
Shrinkage, Tangential = large
Shrinkage, Tangential = fairly large
Shrinkage, Radial = moderate
Shrinkage, Radial = large
Shrinkage, Radial = fairly large

Anderson, R.H.,1947,The Trees of New South Wales,New South Wales Department of AgricultureAustralia - N.S.W. Forestry Commission,1968,Working Properties of some Native and Imported Timbers,Forestry Commission of New South Wales, Technical Publication No.8Australia - N.S.W. Forestry Commission,1988,Furniture Timbers of New South Wales,Forest Commission, N.S.W., Aust. Tech. Publication No.1Boas, I.H.,1947,The Commercial Timbers of Australia - Their Properties and Uses,Council for Scientific and Industrial Research, MelbourneBootle, K.R.,1971,The Commercial Timbers of New South Wales and their use,Angus & Robertson (publishers) PTY LtdForestry Commission of New South Wales,1987,Timbers used in New South Wales for Domestic Buildings,Forestry Commission of New South Wales, Technical Publication No.6Francis, W.D.,1951,Australian Rain-forest Trees,Commonwealth of Australia - Forestry and Timber BureauI.U.F.R.O.,1973,Veneer Species of the World,Assembled at F.P.L. Madison on behalf of I.U.F.R.O. Working Party on,Slicing and Veneer CuttingThe Australian Timber Journal & Building Products, Merchandiser,1969,Timber Durability and Preservation,Supplement to Australian Timber Journal 35(4) Tech. Timb. Guide No.8
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