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Blunting Effect
Boring
Comments
Common Names
Common Uses
Countries of Distribution
Cutting Resistance
Drying Defects
Ease of Drying
Family Name
Gluing
Grain
Heartwood Color
Kiln Drying Rate
Kiln Schedules
Luster
Movement in Service
Nailing
Natural Durability
Numerical Data
Painting
Planing
Polishing
References
Regions of Distribution
Resistance to Impregnation
Resistance to Splitting
Response to Hand Tools
Sapwood Color
Scientific Name
Screwing
Staining
Steam Bending
Strength Properties
Texture
Trade Name
Tree Identification
Tree Size
Turning
Veneering Qualities

Scientific Name
Eucalyptus microcorys

Trade Name
Eucalipto microcorys

Family Name
Myrtaceae

Wood Image 1

Common Names
Eucalipto microcorys, Microcorys gum, Microcorys-gom, Tallowwood

Regions of Distribution
Africa, Oceania and S.E. Asia

Countries of Distribution  [VIEW MAP]
Australia, India, Kenya, South Africa, Sri Lanka, Uganda

Common Uses
Boat building: decking, Bridge construction, Decks, Flooring, Flooring: industrial heavy traffic, Furniture, Handles: general, Heavy construction, Joinery (external): ground contact, Light construction, Marine construction, Piling, Poles, Posts, Railroad ties, Tool handles, Turnery, Vehicle parts, Wheel spokes, Wheels

Heartwood Color
Red
Yellow
Purple
Brown
Pink
Orange
Yellow to golden-yellow to orange
Brown
Pale brown
Greenish to greyish


Sapwood Color
White
Yellow
Red
Color not distinct from heartwood
Paler than heartwood
Clearly differentiated from the heartwood


Grain
Interlocked
Closed
Figure
Wavy
Distinct (figure)

Interlocked
Wavy
Distinct figure


Texture
Coarse
Medium coarse


Luster
Lustrous


Natural Durability
Durable
Susceptible to insect attack
Resistant to termites
Moderately durable
Non-resistant to powder post beetles
Non-resistant to termites
Very durable
Susceptible to attack from powder post (Lyctid & Bostrychid) beetles
Durable
Resistant to attack from termites (Isoptera)
Pinworms (ambrosia beetles) are commonly present
Susceptible to attack from termites (Isoptera)
Moderately resistant to termite (Isoptera) attack


Kiln Schedules
UK=C US=T3C2/T3C1 Fr=3
Dry at a slow speed
UK=B US=T2C2/T2C1 Fr=2
Kiln Drying Rate (in days) is rather slow


Drying Defects
Splitting
Checking
Distortion
Moderate end spitting
Severe surface checking
Moderate twist/warp
Moderate surface checking


Ease of Drying
Variable
Easy
Difficult


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


Tree Identification
Bole/stem form is straight


Tree Size
Tree height is 20-30 m
Trunk diameter is 100-150 cm
Tree height is 10-20 m
Tree height is 30-40 m


Comments
General finishing qualities are rated as good

Blunting Effect
Moderate
Blunting effect on sawing dry wood is mild
Blunting effect on machining is fairly severe
Blunting effect on sawing dry wood is moderate
Blunting effect on machining is severe


Boring
Easy


Cutting Resistance
Easy to saw
Cutting Resistance with dry wood is easy


Gluing
Fairly Easy to Very Easy
Difficult to glue


Movement in Service
Unstable with Poor Stability - Large Movement
Medium
Stable


Nailing
Pre-Boring Recommended
Fairly Easy to Very Easy
Holds nails well


Planing
Fairly Difficult to Very Difficult
Fairly Easy to Very Easy
Planes well, to a good finish


Resistance to Impregnation
Resistant heartwood
Resistant sapwood
Permeable sapwood
Heartwood is extremely resistant
Sapwood is moderately resistant


Resistance to Splitting
Poor


Response to Hand Tools
Easy to Work
Fairly Difficult to Difficult to Work
Easy to machine
Difficult to machine
Moderate working qualities


Screwing
Fairly Easy to Very Easy
Very Good to Excellent Results
Fair to Good Results


Turning
Very Good to Excellent Results
Fair to Good Results
Easy to turn
Good results
Difficult to turn


Veneering Qualities
Suitable for peeling
Suitable for slicing
Veneers easily
Veneers moderately easy
Difficult to veneer


Steam Bending
Poor to Very Poor Results
Moderate


Painting
Fair to Good Results


Polishing
Very Good to Excellent Results
Fair to Good Results
Good results
Satisfactory results


Staining
Poor results
Finish is generally satisfactory
Finish is generally good


Strength Properties
Bending strength (MOR) = high
Max. crushing strength = high
Density (dry weight) = 61<
Shearing strength (parallel to grain) = medium
Hardness (side grain) = Hard
Density (dry weight) = 53-60
Hardness (side grain) = medium
Shearing strength (parallel to grain) = high
Max crushing strength (stiffness) = very high
Shrinkage, Tangential = large
Density (dry weight) = 46-52 lbs/cu. ft.
Bending strength (MOR) = medium
Toughness -hammer drop = medium
Shrinkage, Radial = fairly large
Modulus of Elasticity (stiffness) = high
Shrinkage, Volumetric = large
Shrinkage, Tangential = fairly large
Shearing strength (parallel to grain) = low
Max. crushing strength = medium
Density (dry weight) = 38-45 lbs/cu. ft.
Shrinkage, Tangential = small
Shrinkage, Tangential = moderate
Hardness (side grain) = soft
Density (dry weight) = 31-37 lbs/cu. ft.


Numerical Data
ItemGreenDryEnglish
Bending Strength1469821970psi
Density55lbs/ft3
Hardness2007lbs
Impact Strength40inches
Maximum Crushing Strength738510501psi
Shearing Strength2311psi
Stiffness216724941000 psi
Weight5446lbs/ft3
Radial Shrinkage5%
Tangential Shrinkage9%
Volumetric Shrinkage14%
ItemGreenDryMetric
Bending Strength10331544kg/cm2
Density881kg/m3
Hardness910kg
Impact Strength101cm
Maximum Crushing Strength519738kg/cm2
Shearing Strength162kg/cm2
Stiffness1521751000 kg/cm2
Weight865737kg/m3
Radial Shrinkage5%
Tangential Shrinkage9%

References
Anderson, R.H.,1947,The Trees of New South Wales,New South Wales Department of Agriculture

Australia - Forestry and Timber Bureau,1957,Forest Trees of Australia,Australia Interior Department, Forestry and Timber Bureau

Australia - N.S.W. Forestry Commission,1988,Furniture Timbers of New South Wales,Forest Commission, N.S.W., Aust. Tech. Publication No.1

Banks, C.H. and J.P. Schoeman. 1963. Railway Sleeper and Crossing Timbers. Bulletin No. 41, Republic of South Africa. The Government Printer, Pretoria, South Africa.

Banks, 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.48

Banks, C.H.,1954,The Mechanical Properties of Timbers with Particular Reference to those,grown in the Union of South Africa,Journal of the South African Forestry Association,No. 24 pp.44-65,[South,African Forestry Journal]

Bois, P.J.,1966,The Strength Properties of Tanzania Timbers,Tanzania Forest Div. Util. Sec. Moshi Tech. Note, No.35

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building Research

Bolza, E., Kloot, N.H.,1963,The Mechanical Properties of 174 Australian Timbers,C.S.I.R.O. Division of Forest Products Technological Paper,No.25

Bootle, K.R.,1971,The Commercial Timbers of New South Wales and their use,Angus & Robertson (publishers) PTY Ltd

Brown, W.H.,1978,Timbers of the World, No. 8 Australasia,TRADA, Red Booklet Series

Cause, M.L., Et al,1974,The Nomenclature, Density and Lyctus - Susceptibility of Queensland,Timbers,Queensland Forestry Department Pamphlet 13

Clifford, N.,1953,Commercial Hardwoods - Their Characteristics Identification and,Utilization,Sir Isaac Pitman & Sons Ltd. London

Cox, H.A.,1939,A Handbook of Empire Timbers,Forest Products Research Laboratory, Princes Risborough

Da Costa, E.W.B., Osborne, L.D.,1967,Comparative decay resistance of 26 New Guinea timber species in,accelerated laboratory tests,Comm. Forestry Review 46(1) pp63-74

Farmer, R.H.,1972,Handbook of Hardwoods,HMSO

Forest Products Research Laboratory, U.K.,1945,A Handbook of Empire Timbers,Department of Scientific and Industrial Research Forest Products Research

Forestry Commission of New South Wales,1987,Timbers used in New South Wales for Domestic Buildings,Forestry Commission of New South Wales, Technical Publication No.6

Forests Products Research Laboratory, U.K.,1956,A Handbook of Hardwoods,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research Establishment

Fouarge, J.,1970,Essais Physiques,Mecaniques et de Durabilite de Bois de la Republique,Democratique du Congo,I.N.E.A.C. Belgium Serie Technique,No.76

Gay, F.J., Et al,1955,Standard laboratory colonies of termites for evaluating the resistance of,timber, timber preservatives and other materials to termite attack.,C.S.I.R.O., Australia Bulletin,No.277

Hall, N., Et al,1970,Forest Trees of Australia,Australian Government Publishing Service, Canberra

Howard, A.L.,1948,A Manual of Timbers of the World.,Macmillan & Co. Ltd. London 3rd ed.

Kingston, R.S.T., Risdon, C.J.E.,1961,Shrinkage and Density of Australian and other South-West Pacific Woods,C.S.I.R.O. Division of Forest Products Technological Paper No.13

Kloot, N.H., Bolza, E.,1961,Properties of Timbers Imported into Australia,C.S.I.R.O. Forest Products Division Technological Paper,No.12

Lavers, G.M.,1983,The Strength Properties of Timber (3rd ed. revised Moore G.L.,Forest Products Research Laboratory, Princes Risborough, Building Research,Establishment Report (formerly Bulletin No.50)

Patterson, D.,1988,Commercial Timbers of the World, 5th Edition,Gower Technical Press

Rendle, B.J.,1969,World Timbers (3 Vols.,Ernest Benn Ltd. London

Sao Paulo - Instituto de Pesquisas Tecnologicas,1956,Tabelas de Resultados obtidos para Madeiras Nacionais,Inst. Pesq. Tec. Sao Paulo, Brazil Bol., No.31(2nd Ed.)

Scott, 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.1

Scott, M.H.,1953,Utilisation Notes on South African Timbers,South African Forestry Department Bulletin No.36

South African Lumber Millers Assoc.,1969,Notes on some Commercially Available Hardwoods,S.A.L.M.A. Timber Info. Centre Timber Technical Guide,No.1

Streets, R.J.,1962,Exotic Forest Trees in the British Commonwealth,Clarendon Press Oxford

Takahashi, 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

The Australian Timber Journal & Building Products, Merchandiser,1969,Timber Durability and Preservation,Supplement to Australian Timber Journal 35(4) Tech. Timb. Guide No.8

Titmuss, F.H.,1965,Commercial Timbers of the World,Technical Press Ltd., London, 3rd edition









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