Common Name(s): Rubberwood, Plantation Hardwood, Para Rubbertree Scientific Name: Hevea brasiliensis Distribution: Native to Brazil, but extensively cultivated in tropical regions, especially in Asia Tree Size: 75-100 ft (23-30 m) tall, 1-3 ft (.3-1 m) trunk diameter Average Dried Weight: 37 lbs/ft3 (595 kg/m3) Specific Gravity (Basic, 12% MC): .49, .59 Janka Hardness: 960 lbf (4,280 N) Modulus of Rupture: 10,420 lbf/in2 (71.9 MPa) Elastic Modulus: 1,314,000lbf/in2 (9.07 GPa) Crushing Strength: 6,110 lbf/in2 (42.1 MPa) Shrinkage: Radial: 2.3%, Tangential: 5.1%, Volumetric: 7.5%, T/R Ratio: 2.2 Color/Appearance: Heartwood naturally a light blonde to medium tan color, sometimes with medium brown streaks. Sapwood not distinct from heartwood. Color tends to darken slightly with age. Frequently colored or stained when used in furniture construction. Grain/Texture: Grain is straight, with a somewhat coarse, open texture. Low natural luster. Endgrain: Diffuse-porous; large to very large pores in no specific arrangement, very few; solitary and radial multiples and rows of 2-4; tyloses and heartwood mineral/gum deposits (brown) occasionally present; growth rings usually indistinct; narrow to medium rays barely visible without lens, spacing normal to fairly close; parenchyma diffuse-in-aggregates and  banded (reticulate). Rot Resistance: Rubberwood is perishable, and has very little natural resistance to decay. It is also susceptible to fungal staining and insect attacks. Workability: Easy to work with both … Continue reading Rubberwood