Mahogany, American

Mahogany

Mahogany, American

Durability

Density in kg/m3

Mahogany

The Tree
Forest-grown trees are often very large, sometimes 45.0m high, with a diameter of 2.0m or more above a heavy buttress. Plantation-grown trees often make very rapid growth, frequently reaching small saw-log size in 20 years on good sites, and under average conditions, 300mm to 355mm saw-logs (diameter inside bark) are grown in about 40 years.

The Timber
The sapwood is generally 25mm to 50mm wide, yellowish-white in colour, sharply demarcated from the heartwood, which is pinkish or salmon coloured when freshly sawn, later becoming light reddish-brown with a golden lustre. The grain which is pinkish or salmon coloured when freshly sawn, later becoming light reddish-brown with a golden lustre. The grain is commonly interlocked, producing a wide attractive striped figure on radial surfaces. The texture is rather fine to medium, and is uniform. Deposits of dark-coloured gum in the pores are common, and white deposits are sometimes present. Ripple marks on the tangential longitudinal surfaces can usually be observed.Plantation-grown wood is generally somewhat less dense than forest-grown wood, the latter weighing about 560 kg/m3 and the former about 496 kg/m3 when dried. There appears to be no appreciable difference in density and technical properties of wood from the different countries.

Drying
Central American mahogany can be air dried and kiln dried rapidly and easily, without appreciable warping or checking. The presence of tension wood and gelatinous fibres is not uncommon in S. macrophylla and such wood can result in a high rate of longitudinal shrinkage during kiln drying.

Strength
The strength properties are extremely good for a timber of its weight. For this reason it was at one time used almost exclusively for aeroplane propellers. Plantation-grown wood is slightly below forest-grown wood in bending strength and work to maximum load in static bending in proportion to its slightly lower density. On the other hand, plantation-grown wood is generally superior in hardness, compression across the grain and shear. In the air dry condition, plantation-grown material is very much lower in modulus of elasticity, although both types are about equal in shock resistance.

Working Qualities
Good - One of the most satisfactory and easiest of woods to work, either with hand or machine tools. The sometimes frequent presence of tension wood gives rise to fuzzy surfaces in machining, which necessitates heavy sanding, but the use of sharp cutting edges where woolliness is encountered is generally sufficient, along with sanding, to produce an excellent finish. The wood is easy to glue, takes nails and screws well and will take an excellent polish. It is one of the easier woods to slice or rotary cut into veneer, although flitches will frequently develop cracks when not properly boiled.

Latin Name
Swietenia macrophylla

Also known as
American mahogany (According to origin), araputanga (Brazil), zopilote gateado (Mexico), acajou (France), caoba ( Spanish-speaking areas), mara (Brazil), mogno (Brazil), caoba hondurena (Spanish-speaking areas)

Wood Type
Hardwood

Treatability
Extremely difficult

Moisture
Small

Texture
Medium

Origin
Mexico, Central America, South America, Brazil, Belize, Colombia, Panama, Peru, Bolivia