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Clicking any heading in the main data area (at right) will scroll the page back to this top position. Use the following links to jump to the associated section in the main data. Blunting Effect Comments Common Names Common Uses Countries of Distribution Cutting Resistance Distribution Overview Drying Defects Ease of Drying Environmental Profile Family Name Gluing Grain Heartwood Color Kiln Drying Rate Movement in Service Nailing Natural Durability Numerical Data Planing Polishing Product Sources References Regions of Distribution Resistance to Impregnation Response to Hand Tools Routing & Recessing Sapwood Color Scientific Name Screwing Staining Steam Bending Texture Toxicity Trade Name Tree Size Turning Varnishing Veneering Qualities Scientific Name Eucalyptus astringens Trade Name Brown mallet Family Name Myrtaceae Common Names Brown mallet, Ironbark Regions of Distribution Oceania and S.E. Asia Countries of Distribution  [VIEW MAP] India Common Uses Bridge beams, Bridge construction, Bridge joists, Building construction, Building materials, Cabin construction, Construction, Crossties, Factory construction, Foundation posts, Heavy construction, Mine timbers, Posts, Railroad ties, Stakes Environmental Profile Status has not been officially assessed Distribution Overview South western region of western Australia. Heartwood Color Red Yellow White Brown Pink Orange Light brown Grey brown Darkens significantly upon exposure Sapwood Color Red Yellow White 1 to 1.5 inches (2.5 to 4 cm) wide and is immune to Lyctus attack since it is starch free Grain Interlocked Interlocked Texture Coarse Uniform Fine Natural Durability Susceptible to insect attack Resistant to powder post beetles Moderately durable Non-resistant to termites Non-resistant to marine borers Non-resistant to powder post beetles Moderately resistant to decay Toxicity Some toxic effects Drying Defects Internal Honeycombing Possible Checking Collapse Distortion Ease of Drying Moderately Difficult to Difficult Fairly Easy Rapidly Easy Kiln Drying Rate Naturally dries quickly Slow Drying rate is slow Tree Size Tree height is greater than 70 m Tree height is 60-70 m Trunk diameter is 200-250 cm Trunk diameter is 150-200 cm Trunk diameter is 100-150 cm Sapwood width is 0-5 cm Tree height is 30-40 m Tree height is 50-60 m Tree height is 40-50 m Product Sources Brown mallet trees are of considerable importance since the bark is a rich source of tannin. Comments The timber is tough, and is superior in that respect to American ash (Fraxinus americana ), Karri (Eucalyptus diversicolor ), or Spotted gum (E. maculata ). It is also described as dense and very hard, with its toughness increasing on drying Blunting Effect Moderate Little Cutting Resistance Easy to saw Fairly Difficult to Very Difficult to saw Moderate to saw Gluing Fairly Easy to Very Easy Fairly Difficult to Very Difficult Fair to Good Results Movement in Service Fair to Good Stability - Medium Movement Nailing Fair to Good Results Fairly Difficult to Very Difficult Planing Fair to Good Results Fairly Easy to Very Easy Poor to Very Poor Results Very Good to Excellent Results Resistance to Impregnation Resistant heartwood Permeable sapwood Resistant sapwood Response to Hand Tools Easy to Work Fairly Difficult to Difficult to Work Routing & Recessing Fair to Good Results Screwing Fairly Easy to Very Easy Turning Fairly Easy to Very Easy Veneering Qualities Veneers moderately easy Difficult to veneer Veneers easily Suitable for peeling Steam Bending Fair to Good Results Very Good to Excellent Results Polishing Fair to Good Results Very Good to Excellent Results Staining Fair to Good Results Very Good to Excellent Results Varnishing Very Good to Excellent Results Fair to Good Results Fairly Easy to Very Easy Numerical Data Item Green Dry English Bending Strength 16072 25480 psi Crushing Strength 1764 2940 psi Density 62 lbs/ft3 Hardness 3200 lbs Impact Strength 25 inches Maximum Crushing Strength 7585 13328 psi Shearing Strength 2827 psi Static Bending 9330 12642 psi Stiffness 2185 2626 1000 psi Toughness 361 inch-lbs Weight 61 50. lbs/ft3 Item Green Dry Metric Bending Strength 1130 1791 kg/cm2 Crushing Strength 124 206 kg/cm2 Density 993 kg/m3 Hardness 1451 kg Impact Strength 63 cm Maximum Crushing Strength 533 937 kg/cm2 Shearing Strength 198 kg/cm2 Static Bending 655 888 kg/cm2 Stiffness 153 184 1000 kg/cm2 Toughness 415 cm-kg References Bolza, E., Kloot, N. H. 1963. The Mechanical Properties of 174 Australian Timbers. Technological Paper No. 25. Division of Forest Products, Center for Scientific and Industrial Organization (CSIRO, Melbourne, Australia. Hillis, W.E. and A.G. Brown, Editors. 1984. Eucalyptus for Wood Production. Commonwealth Scientific and Industrial Research Organization, Academic Press, Australia. Wallis, N.K. 1956. Australian Timber Handbook. Sponsored by The Timber Development Association of Australia. Angus & Robertson, Ltd., 89 Castlereagh Street, Sydney, Australia.