Scientific Name
Agathis robusta
Trade Name
Kauri pine
Family Name
Araucariaceae
Synonyms
Agathis browneii
Common Names
Agathis, Almaciga, Bindang, Dakua makadre, Damar minyak, Dammara pine, Dundatha pine, Kauri, Kauri pine, Menghilan, Queensland kauri, Queensland kauri pine, South Queensland kauri, Tolong
Plantation species?
Yes
Regions of Distribution
Africa, Oceania and S.E. Asia
Countries of Distribution [VIEW MAP]
Australia, Brunei, Cambodia, China, Fiji, India, Indonesia, Laos, Malaysia, Myanmar, New Zealand, Papua New Guinea, Philippines, South Africa, Thailand, Vietnam
Common Uses
Agricultural implements, Boat building (general), Bobbins, Boxes and crates, Building materials, Cabinetmaking, Carvings, Core Stock, Decorative plywood, Decorative veneer, Domestic flooring, Excelsior, Figured veneer, Flooring, Food containers, Furniture, Interior construction, Interior trim, Joinery, Light construction, Matches, Mathematical instruments, Millwork, Moldings, Musical instruments, Paneling , Paneling, Parquet flooring, Picker sticks, Plain veneer, Plywood, Pulp/Paper products, Shade rollers, Shuttles, Specialty items, Spindles, Spools, Sporting Goods, Stencil & chisel blocks, Sub-flooring, Sucker rods, Tables, Toys, Trimming, Turnery, Umbrella handles , Vats, Veneer, Wainscotting
Environmental Profile
Status has not been officially assessed |
Distribution Overview
Found in Australia, in two disjunct areas: one in S Queensland between Tewantin and Maryborough (mainland) and on Fraser Island |
Heartwood Color
Brown | ||||||||||||
White | ||||||||||||
Red | ||||||||||||
Pink | ||||||||||||
Yellow | ||||||||||||
Orange | ||||||||||||
Pale brown | ||||||||||||
White to cream | ||||||||||||
Pale red to pink | ||||||||||||
Yellow to golden-yellow to orange | ||||||||||||
Pinkish white | ||||||||||||
Light brown |
Sapwood Color
Red | ||||||||||||
Brown | ||||||||||||
Yellow | ||||||||||||
White | ||||||||||||
Color not distinct from heartwood |
Grain
Straight | ||||||||||||
Even | ||||||||||||
Figure | ||||||||||||
Mottle |
Straight | ||||||||||||
Mottled or streaked figure sometimes |
Texture
Fine | ||||||||||||
Even or uniform | ||||||||||||
Fine | ||||||||||||
Uniform |
Luster
High | ||||||||||||
Medium | ||||||||||||
Lustrous |
Natural Durability
Non-durable | ||||||||||||
Perishable | ||||||||||||
Susceptible to insect attack | ||||||||||||
Non-resistant to marine borers | ||||||||||||
Non-resistant to termites | ||||||||||||
Resistant to powder post beetles | ||||||||||||
Non-resistant to termites | ||||||||||||
Non durable | ||||||||||||
Very little natural resistance | ||||||||||||
Susceptible to marine borer attack | ||||||||||||
Susceptible to attack from termites (Isoptera) | ||||||||||||
Susceptible to attack by marine borers and termites | ||||||||||||
Resistant to attack from powder post (Lyctid & Bostrychid) beetles |
Odor
No specific smell or taste |
Corrosive Properties
Non-corrosive |
Kiln Schedules
Drying (speed) is fast | ||||||||||||
Kiln Drying Rate (in days) is fairly rapid | ||||||||||||
Uk=J US=T10D5S/T8D4S Fr=4 | ||||||||||||
T10 – D5s (4/4); T8 – D4s (8/4) US | ||||||||||||
Dry at a moderate speed |
Drying Defects
Collapse | ||||||||||||
Internal Honeycombing Possible | ||||||||||||
Distortion | ||||||||||||
Collapse and honeycomb in heartwood is possible due to mineral stains and wetwood. |
Ease of Drying
Fairly Easy | ||||||||||||
Rapidly | ||||||||||||
Medium to High Shrinkage | ||||||||||||
Slowly | ||||||||||||
Easy |
Drying characteristics have been rated as good
Kiln Drying Rate
Naturally dries quickly | ||||||||||||
Rapid | ||||||||||||
Drying rate is fairly rapid to fast | ||||||||||||
Naturally dries at a moderate speed | ||||||||||||
Rapid (<10 days for boards < 32 mm, to <30 days for boards >= 63 mm) |
Tree Identification
Bole/stem form is straight | ||||||||||||
Bole/stem form is cylindrical | ||||||||||||
Plantation-grown variety tends to grow straighter. |
Tree Size
Trunk diameter is 100-150 cm | ||||||||||||
Tree height is 40-50 m | ||||||||||||
Tree height is 50-60 m | ||||||||||||
Trunk diameter is 150-200 cm | ||||||||||||
Tree height is 20-30 m | ||||||||||||
Tree height is 10-20 m | ||||||||||||
Bark width is 25-30 mm | ||||||||||||
Tree height is 30-40 m | ||||||||||||
Trunk diameter is 200-250 cm | ||||||||||||
Trunk diameter is 300-350 cm |
Comments
General finishing qualities are rated as good
May include compression wood which can cause excessive longitudinal shrinkage and distortion
Blunting Effect
Little | ||||||||||||
Moderate | ||||||||||||
There is some significant blunting effect on cutting tools |
Boring
Fairly easy to very easy | ||||||||||||
Fair to good results | ||||||||||||
Easy |
Important to properly support the stock at the tool exit
Carving
Fairly Easy to Very Easy | ||||||||||||
Easy to carve |
Cutting Resistance
Easy to saw | ||||||||||||
Low resistance to sawing | ||||||||||||
Cutting Resistance with dry wood is easy |
Gluing
Fairly Easy to Very Easy | ||||||||||||
Very Good to Excellent Results | ||||||||||||
Fair to Good Results | ||||||||||||
Moderate gluing properties |
Mortising
Fairly Easy to Very Easy | ||||||||||||
Fair to Good Results | ||||||||||||
Support material during mortising to prevent break out. | ||||||||||||
Finishes well |
Moulding
Fair to Good Results | ||||||||||||
Fairly Easy to Very Easy | ||||||||||||
Good moulding properties |
Movement in Service
Excellent Stability – Small Movement | ||||||||||||
Fair to Good Stability – Medium Movement | ||||||||||||
Stable | ||||||||||||
Holds shape well |
Nailing
Fair to Good Results | ||||||||||||
Fairly Easy to Very Easy | ||||||||||||
Very Good to Excellent Results | ||||||||||||
Holds nails well | ||||||||||||
Easy to nail | ||||||||||||
Holds satisfactorily |
Planing
Fairly Easy to Very Easy | ||||||||||||
Fair to Good Results | ||||||||||||
Very Good to Excellent Results | ||||||||||||
Planes well, to a good finish | ||||||||||||
Good planing properties | ||||||||||||
Easy to plane |
Resistance to Impregnation
Resistant sapwood | ||||||||||||
Resistant heartwood | ||||||||||||
Sapwood has low permeability | ||||||||||||
Heartwood is resistant |
Response to Hand Tools
Easy to Work | ||||||||||||
Responds Readily | ||||||||||||
Easy | ||||||||||||
Easy to machine |
Good recessing properties.
Routing & Recessing
Fairly Easy to Very Easy | ||||||||||||
Routing is easy |
Sanding
Fairly Easy to Very Easy | ||||||||||||
Easy to sand |
Screwing
Fair to Good Results | ||||||||||||
Screwing yields satisfactory results |
Turning
Fairly Difficult to Very Difficult | ||||||||||||
Difficult to turn |
Steam Bending
Fair to Good Results | ||||||||||||
Moderate | ||||||||||||
Good |
Painting
Fair to Good Results | ||||||||||||
Very Good to Excellent Results | ||||||||||||
Fairly Easy to Very Easy | ||||||||||||
Good results | ||||||||||||
Little or no surface prep required |
Polishing
Fair to Good Results | ||||||||||||
Very Good to Excellent Results | ||||||||||||
Good results |
High polish
Staining
Fair to Good Results | ||||||||||||
Very Good to Excellent Results | ||||||||||||
Fairly Easy to Very Easy | ||||||||||||
Finish is generally good | ||||||||||||
Stains well | ||||||||||||
Staining (Characteristic) = non-staining |
Varnishing
Fair to Good Results | ||||||||||||
Fairly Easy to Very Easy | ||||||||||||
Good results |
Strength Properties
Density (dry weight) = 31-37 lbs/cu. ft. | ||||||||||||
Max. crushing strength = low | ||||||||||||
Density (dry weight) = 23-30 lbs/cu. ft. | ||||||||||||
Bending strength (MOR) = low | ||||||||||||
Shrinkage, Tangential = small | ||||||||||||
Shrinkage, Tangential = very small | ||||||||||||
Shrinkage, Radial = very small | ||||||||||||
Shrinkage, Radial = small | ||||||||||||
Modulus of Elasticity (stiffness) = very low | ||||||||||||
Modulus of Elasticity (stiffness) = low |
Numerical Data
Item | Green | Dry | English |
Bending Strength | 7741 | 12807 | psi |
Density | 32 | lbs/ft3 | |
Hardness | 727 | lbs | |
Maximum Crushing Strength | 3227 | 5785 | psi |
Shearing Strength | 1642 | psi | |
Stiffness | 1230 | 1500 | 1000 psi |
Specific Gravity | 0.37 | ||
Weight | 31 | 25 | lbs/ft3 |
Radial Shrinkage | 2 | % | |
Tangential Shrinkage | 4 | % | |
Item | Green | Dry | Metric |
Bending Strength | 544 | 900 | kg/cm2 |
Density | 512 | kg/m3 | |
Hardness | 329 | kg | |
Maximum Crushing Strength | 226 | 406 | kg/cm2 |
Shearing Strength | 115 | kg/cm2 | |
Stiffness | 86 | 105 | 1000 kg/cm2 |
Specific Gravity | 0.37 | ||
Weight | 496 | 400 | kg/m3 |
Radial Shrinkage | 2 | % |
References
Audas, J.W.,Native Trees of Australia,Whitcombe & Tombs PTY. Ltd
Australia – Forestry and Timber Bureau,1957,Forest Trees of Australia,Australia Interior Department, Forestry and Timber Bureau
Boas, I.H.,1947,The Commercial Timbers of Australia – Their Properties and Uses,Council for Scientific and Industrial Research, Melbourne
Boone, R.S., C.J. Kozlik, P.J. Bois, E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Hardwoods -Temperate and Tropical. USDA, Forest Service, General Technical Report FPL-GTR-57, Forest Products Laboratory, Madison, Wisconsin.
Brown, W.H.,1978,Timbers of the World, No. 8 Australasia,TRADA, Red Booklet Series
Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.
Clifford, N.,1957,Timber Identification for the Builder and Architect,Leonard Hill (Books) LTD. London
Dadswell, H.E., Eckersley, A.M.,1935,The Identification of the Principal Commercial Australian Timbers other,than eucalyptus,Australian C.S.I.R.O. Bulletin NO.90
Dallimore, W. and Jackson, A. Bruce,1966,A Handbook of Coniferae and Ginkgoaceae Fourth Ed. Revised by S.G.,Harrison,Edward Arnold (Publishers) Ltd. London
Eddowes, P. J. 1961. Commercial Timbers of Papua New Guinea:Their Properties and Uses. Office of Forests, Papua New Guinea
Forest Products Research Laboratory U.K.,1957,A Handbook of Softwoods,Department of Scientific and Industrial Research Forest Products Research,HMSO
Francis, W.D.,1951,Australian Rain-forest Trees,Commonwealth of Australia – Forestry and Timber Bureau
Fundter, J.M.,1982,Names for Dipterocarp timbers and trees from Asia,Pudoc, Wageningen, Netherlands
Guyana – Forest Department,1951,British Guiana Timbers – Yellow Silverballi,British Guiana Forestry Department Leaflet No. 13
Hall, N., Et al,1972,The use of trees and shrubs in the dry country of Australia,Australian Government, Department of National Development, Forest and,Timber Bureau, Canberra
Howard, A.L.,1948,A Manual of Timbers of the World.,Macmillan & Co. Ltd. London 3rd ed.
Keating, W.G., Bolza, E.,1982,Characteristics properties and uses of timbers. South East Asia, Northern,Australia and the Pacific,C.S.I.R.O. Div. Chemical Technology,Inkata Press,1
Patterson, D.,1988,Commercial Timbers of the World, 5th Edition,Gower Technical Press
Titmuss, F.H.,1965,Commercial Timbers of the World,Technical Press Ltd., London, 3rd edition