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 Boring Carving Comments Common Names Common Uses Countries of Distribution Cutting Resistance Distribution Overview Drying Defects Ease of Drying Environmental Profile Gluing Grain Heartwood Color Luster Mortising Moulding Movement in Service Nailing Natural Durability Numerical Data Odor Planing Polishing References Regions of Distribution Resistance to Impregnation Routing & Recessing Sapwood Color Scientific Name Screwing Silica Content Staining Steam Bending Texture Trade Name Tree Size Turning		Scientific Name Dracontomelum mangiferum Trade Name New Guinea walnut Family Name Common Names New Guinea walnut, Senai, Senkuang Regions of Distribution Oceania and S.E. Asia Countries of Distribution  [VIEW MAP] Indonesia, Malaysia, Papua New Guinea, Philippines Common Uses Bedroom suites, Boat building, Cabinetmaking, Canoes, Chairs, Chests, Concealed parts (Furniture), Core Stock, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Drum sticks, Excelsior, Factory flooring, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Hatracks, Joinery, Kitchen cabinets, Lifeboats, Living-room suites, Musical instruments , Office furniture, Organ pipes, Parquet flooring, Piano keys, Pianos , Plywood, Pulpwood, Shipbuilding, Veneer Environmental Profile Status unknown due to inadequate information Status has not been officially assessed Distribution Overview Very limited quantities in Northern Queensland in Australia but spread throughout Papua New Guinea and other parts of South East Asia. A large tree that can attain 50m (170ft). Heartwood Color Brown Red Pink Orangish cast Grey brown Dark brown with black bands The heartwood has a gray-brown background color with an orange cast. The surface shows irregular, dark brown to black banding Sapwood Color Yellow White Brown Red Wide Pinkish Pale yellow Grey Clearly differentiated from the heartwood Grain Closed Interlocked Figure Wavy Stripe (figure) Striped figure Moderately interlocked and wavy Quartersawn surfaces produce a broken striped figure Texture Coarse Medium Medium Even textured Luster Low Lustrous Natural Durability Perishable Non-resistant to powder post beetles Non-resistant to termites Non-durable Susceptible to attack by marine borers Moderately resistant to attack by termites Heartwood resistant to decay Odor Has an odor No specific smell or taste Silica Content Siliceous Drying Defects Distortion Thinner stock may warp Rapid drying may cause distortion and checking Ease of Drying Rapidly Fairly Easy Little degrade Material in smaller dimensions requires care to minimize degrade Dries well under good controlled conditions Tree Size Tree height is 20-30 m Tree height is 30-40 m Trunk diameter is 100-150 cm Stems are straight and well-formed, with merchantable lengths of 65 to 80 feet (22 to 24 m) Comments New Guinea Walnut is not a true walnut Blunting Effect Medium dulling effect on cutting edges Boring Fair to good results Carving Fair to Good Results Cutting Resistance Easy to saw Easy to saw Resistance to cutting is low, and the wood saws without difficulty. Gluing Very Good to Excellent Results Fairly Easy to Very Easy Satisfactory gluing properties Mortising Fair to Good Results Moulding Fair to Good Results Movement in Service Medium Nailing Fairly Easy to Very Easy Good nailing characteristics Planing Very Good to Excellent Results Fair to Good Results Special attention required Responds well to hand and machine tools Moderate blunting effect on cutting edges Easy to plane Tools should be kept very sharp in order to obtain smooth, clean surfaces Resistance to Impregnation Permeable sapwood Permeable heartwood Resistant to preservative treatment Routing & Recessing Fair to Good Results Screwing Good screwing properties Turning Fair to Good Results Fairly Easy to Very Easy Steam Bending Moderate Polishing Fair to Good Results Surface Preparation Satisfactory results Staining Satisfactory staining properties Numerical Data Item Green Dry English Bending Strength 8350 11564 psi Crushing Strength 608 1049 psi Density 45 lbs/ft3 Hardness 818 lbs Maximum Crushing Strength 4214 6566 psi Shearing Strength 1558 psi Static Bending 5321 7722 psi Stiffness 1372 1627 1000 psi Toughness 83 inch-lbs Specific Gravity 0.66 Weight 44 36. lbs/ft3 Radial Shrinkage 4 % Tangential Shrinkage 7 % Item Green Dry Metric Bending Strength 587 813 kg/cm2 Crushing Strength 42 73 kg/cm2 Density 721 kg/m3 Hardness 371 kg Maximum Crushing Strength 296 461 kg/cm2 Shearing Strength 109 kg/cm2 Static Bending 374 542 kg/cm2 Stiffness 96 114 1000 kg/cm2 Toughness 95 cm-kg Specific Gravity 0.66 Weight 705 576. kg/m3 Radial Shrinkage 4 % References Bolza, E., Kloot, N. H. 1966. The Mechanical Properties of 81 New Guinea Timbers. Technological Paper No. 41. Division of Forest Products, Center for Scientific and Industrial Organization (CSIRO, Melbourne, Australia. Desch, H. E. 1957. Manual of Malayan Timbers - Volume I. Malayan Forest Records, No. 15. Malaya Publishing House Ltd., Singapore. 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 Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc., Fresno, California.