- Common Name(s):Goncalo alves, tigerwood, jobillo, muiracatiara
- Scientific Name:Astroniumspp. (primarily A. fraxinifolium and A. graveolens)
- Distribution:From Mexico southward to Brazil
- Tree Size:100-130 ft (30-40 m)tall, 3-5 ft (1-1.5 m) trunk diameter
- Average Dried Weight:57 lbs/ft3(905 kg/m3)
- Specific Gravity (Basic, 12% MC):0.8, 0.91
- Janka Hardness:2,170 lbf(9,640 N)
- Modulus of Rupture:16,970 lbf/in2(117 MPa)
- Elastic Modulus:2,401,000 lbf/in2(16.56 GPa)
- Crushing Strength:10,770 lbf/in2(74.2 MPa)
- Shrinkage:Radial: 4.2%,
- Tangential: 7.8%,
- Volumetric: 11.2%,
- T/R Ratio: 1.9
Decorative Veneers, Doors & Windows, Fine furniture, Natural Forest Timber, Tonewoods
Gonçalo Alves / Jobillo / Tigerwood
Goncalo alves is commonly referred to as tigerwood or Brazilian tigerwood among flooring dealers. The wood has superb stiffness, strength, hardness, and durability. However, density and other mechanical properties can vary widely depending on the growing site and source region. The name jobillo is sometimes used locally or among woodturners to refer to higher grades of goncalo alves.
| Color/Appearance | Heartwood is typically a medium reddish brown with irregularly spaced streaks of dark brown to black. Color tends to darken with age. Some pieces of goncalo alves may be completely uniform in color with no streaks or stripes. |
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| Grain/Texture | Grain can be straight, but is usually wavy or interlocked. Fine, uniform texture with good natural luster. |
| Rot Resistance | Goncalo alves has excellent weathering properties, and is rated as very durable regarding decay resistance. |
| Workability | Goncalo alves is generally not too difficult to work, despite its high density. Figured pieces with irregular grain can pose a challenge in planing and machining operations. Goncalo alves can also have a moderate blunting effect on cutters. The wood is very resistant to moisture absorption, which can make it difficult to glue. Goncalo alves turns and finishes well. |
| Odor | No characteristic odor |
| Allergies/Toxicity | Although severe reactions are quite uncommon, goncalo alves has been reported as a sensitizer. Usually most common reactions simply include eye and skin irritation. |
| Pricing/Availability | Widely available in a variety of widths and lengths as both lumber and veneer, as well as smaller craft blanks. Prices should be comparatively moderate for an imported tropical hardwood. |
| Sustainability | This wood species is not listed in the CITES Appendices, and is reported by the IUCN as being a species of least concern. |
| Common Uses | Flooring, veneers, furniture, cabinetry, carving, turned objects, and other small wood specialty objects such as: pool cues, archery bows, knife handles, etc. |
| Comments | Goncalo alves is commonly referred to as tigerwood or Brazilian tigerwood among flooring dealers. The wood has superb stiffness, strength, hardness, and durability. However, density and other mechanical properties can vary widely depending on the growing site and source region. The name jobillo is sometimes used locally or among woodturners to refer to higher grades of goncalo alves. |
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