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WATTLE (Acacia leucophloea)

Trade Name

Wattle

Scientific Name

Acacia leucophloea Willd.

Family

LEGUMINOSAE

Common Names

A kawa (Vietnam); A bu (Vietnam); Phayamai (Thailand); Chalaep daeng (Thailand); Ta noung (Myanmar); Pilang (Indonesia); Forest siris (Australia)

Scientific Name Synonyms

Delapontea microphylla Gagnep; Delapontea ferox Gagnep; Acacia melanochaetes Zoll

Description Of The Tree

Botanical Description

It is a medium-sized to fairly large deciduous tree up to 35 m tall. The bole is up to 100 cm in diameter.

Natural Habitat

Acacia leucophloea is found in savanna or scrub vegetation, dry forests and teak forests, on well drained soils, between 50 to 750 m of altitude.

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Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Colored deposits in heartwood vessels. Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and sh Axial parenchyma in marginal or in seemingly marginal bands. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma aliform. Axial parenchyma confluent. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 4 to 10 rays per mm (medium). Larger rays more than 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Fibers with simple to minutely bordered pits.

  • Wood Macro Photo Radial Plane
  • Wood Micro Photo Of Transversal Section

Availability

Cites Status

Unrestricted

General Wood Description

Color

The heartwood is pale olive brown to pink darkening to reddish-brown or dark red with darker streaks, sharply differentiated from the pale yellowish sapwood.

COLOR INDEX (1=Black, 7=Light yellow,white)

4

Grain

The grain varies from straight to slightly interlocked.

Texture

The texture is fine to medium and even.

Luster

This species is moderate in luster.

Natural Durability

It is durable when exposed to weather, but not in contact with ground. It is resistant to dry wood termites.

Natural durability index (1= Very high durability, 7=Vey low durability)

4

Internal Growth Stresses

Growth stresses are reported in this species.

Resistance To Impregnation

The heartwood is moderately resistant to preservative treatment.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.7660571561

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.87

Total shrinkage Tangential (Saturated to 0%MC) (%)

8.1

Total shrinkage Radial (Saturated to 0%MC) (%)

3.8

Drying Defects

Ease of Drying: The wood dries rapidly without much degrade. Boards of 15 mm thick take about 2.5 months to air dry. Drying Defects: It is prone to staining during seasoning. Kiln Schedules: The wood can be dried moderately fast, just like other durian timber, using schedule D (Malaysia), with only slight twisting. It is recommended to air dry sawn timber for at least 2 weeks before kiln drying.

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

2.1

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

876

Stiffness (MOE) 12%MC (kgf/cm²)

107607

Compression parallel to fiber 12%MC (kgf/cm²)

535

Shear strength radial 12%MC (kgf/cm²)

94

Workability

Sawing

Sawing of this wood is reported to be fair to difficult.

Machining

It is easy to machine.

Planing

The wood planes easily to a smooth, lustrous surface using cutting angles of 15 to 25 degrees.

Turning

30

Boring

Boring is reported to be easy.

Nailing

It is easy to nail.

Finishing

Wood of this species is easy to finish.

Polishing

It is easy to polish.

Response To Hand Tools

It is easy to work with hand tools.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, flooring, FURNITURE AND CABINETS, TURNING, TOOLS, tool handles, agricultural tools

General Housing
  • 10 - Silica in Timbers
Flooring
  • 14 - Handbook of Hardwoods
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Turning
  • 30 - Embassy of Honduras in Japan
Tools
  • 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
  • 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Agricultural Tools
  • 44 - Atlas of Peruvian Woods

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