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Alpine ash
Alpine ash (Eucalyptus delegatensis)

Family: Myrtaceae

Common names: Alpine ash, Australian oak, Eucalyptus, Gum top stringy bark, Mountain ash, Red mountain ash, Southern mountain ash, Stringy bark, Tasmanian oak, Victorian ash, White top stringy bark, Woollybut

Distributed in: Australia (Oceania and S.E. Asia)

Distribution overview: Eastern Victoria, extreme southeastern New South Wales in Australia.

Common uses: Agricultural implements, Baseball bats, Boat building (general), Boat building: planking, Boxes and crates, Cabinetmaking, Carvings, Cooperages, Flooring, Food containers, Furniture, Handles: general, Heavy construction, Joinery, Ladders, Light construction, Matches, Moldings, Oars, Paneling, Particleboard, Plywood corestock, Plywood, Poles, Pulp/Paper products, Skis, Sporting Goods, Tool handles, Toys, Turnery, Vats, Vehicle parts, Wheel spokes, Wheels

Tree size: Trunk diameter is 150-200 cm

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

Natural durability: Susceptible to marine borer attack, Very durable

Kiln Schedules: Kiln Drying Rate (in days) is rather slow

Kiln Drying Rate: Slow (18-28 days for boards < 32 mm, to 52-84 days for boards >= 63 mm)

Drying Defects: Severe collapse and honeycomb, Slight surface checking

Ease of Drying: Moderately Difficult to Difficult

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Blunting Effect: Blunting effect on sawing dry wood is moderate

Cutting Resistance: Easy to saw

Gluing: Moderate gluing properties

Nailing: Holds satisfactorily, Pre-Boring Recommended

Planing: Planes well, to a good finish

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Moderate working qualities

Routing recessing: Satisfactory routing results

Veneering qualities: Moderately easy to veneer, There is slight to moderate drying degrade and the potential for buckles and splits

Steam bending: Very good

Screwing: Easy to screw, Fairly Difficult to Very Difficult; Turning: Fairly Difficult to Very Difficult

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

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 641 kg/m3
Bending Strength 643 1006 kg/cm2
Crushing Strength 362 553 kg/cm2
Hardness 451 kg
Impact Strength cm
Shearing Strength 116 kg/cm2
Stiffness 119 137 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 6 %
Weight 624 496 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 9158 14311 psi
Density 40 lbs/ft3
Hardness 995 lbs
Maximum Crushing Strength 5159 7875 psi
Shearing Strength 1652 psi
Stiffness 1695 1956 1000 psi
Weight 39 31 lbs/ft3
Radial Shrinkage 6 %
Tangential Shrinkage 10 %

Density (dry weight) = 38-45 lbs/cu. ft. 0
Bending strength (MOR) = medium 0
Modulus of Elasticity (stiffness) = medium 1
Density (dry weight) = 46-52 lbs/cu. ft.
Max. crushing strength = medium
Shearing strength (parallel to grain) = low
Density (dry weight) = 31-37 lbs/cu. ft.
Max. crushing strength = high
Shrinkage, Tangential = large
Hardness (side grain) = soft
Shrinkage, Radial = large
Modulus of Elasticity (stiffness) = low
Modulus of Elasticity (stiffness) = high
Bending strength (MOR) = low
Shrinkage, Radial = fairly large
Shearing strength (parallel to grain) = medium
Bending strength (MOR) = high

Australia - 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.1Banks, C.H., Schoeman, J.P., Otto, K.P.,1977,The Mechanical Properties of Timbers with particular reference to South,Africa,South African Forestry Research Institute Bulletin,(Ed.,Schoeman, J.P. 1973 & Otto K.P. 1976,No.48Boas, I.H.,1947,The Commercial Timbers of Australia - Their Properties and Uses,Council for Scientific and Industrial Research, MelbourneBolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBolza, E., Kloot, N.H.,1963,The Mechanical Properties of 174 Australian Timbers,C.S.I.R.O. Division of Forest Products Technological Paper,No.25Bolza, E.,1976,Timber and Health,Div. Building Res. C.S.I.R.O. AustraliaFarmer, R.H.,1972,Handbook of Hardwoods,HMSOForests Products Research Laboratory, U.K.,1956,A Handbook of Hardwoods,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research EstablishmentHaslett, A.N.,1988,Properties and utilisation of exotic speciality timbers grown in New,Zealand Part V: Ash Eucalypts and Eucalyptus nitens E. regans,,E.delegatensis, E.fastigata, E.obliqua, E.sieberi, E.fraxinoides, E.nitens,New Zealand Forest Service, Forest Research Institute, FRI Bulletin No.119I.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 CuttingScott, M.H.,1935,Weights of South African Growth Timbers,South African Department of Agriculture and Forestry Bulletin,No.145,Forest Products Institute, Forestry Series No.1Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7The Australian Timber Journal & Building Products, Merchandiser,1969,Timber Durability and Preservation,Supplement to Australian Timber Journal 35(4) Tech. Timb. Guide No.8Thomas, A.J.,1955,Tasmanian Woods,Forestry Department Tasmania, Bulletin No.1Timber Development Association,1942,Tasmanian Oak - Eucalyptus obliqua, E. regnans and E. gigantea,TRADA Timber Leaflet No. 30
*Come interpretare i dati (manleva su eventuali imprecisioni)