Pericopsis angolensis (Afromosia)


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Scientific Name
Pericopsis angolensis

Trade Name
Afromosia

Family Name
Leguminosae

Synonyms
Ormosia angolensis, Afrormosia angolensis

Common Names
Afromosia, Chianga, Chiwanga, East African afrormosia, Mbanga, Mmanga, Muanga, Mubamku, Muvanga, Muwanga, Mwanga, Umbanga

Regions of Distribution
Africa

Countries of Distribution  [VIEW MAP]
Central African Republic, Tanzania, Zaire, Zimbabwe

Common Uses
Agricultural implements, Boat building (general), Boxes and crates, Cabinetmaking, Canoes, Carvings, Charcoal, Decks, Flooring, Flooring: commercial heavy traffic, Fuelwood, Furniture, Heavy construction, Joinery, Light construction, Marine construction, Millwork, Mine timbers, Musical instruments, Plywood, Poles, Posts, Railroad ties, Sporting Goods, Tool handles, Turnery, Vats, Vehicle parts, Veneer: decorative, Wheel spokes, Wheels

Heartwood Color

Black
Brown
Pale brown
Greenish to greyish
Dark brown
Yellow to golden-yellow to orange
Brown
Black

Sapwood Color

Green/Grey
Brown
White to yellow
Well defined

Grain

Interlocked
Distinct (figure)
Figure
Even
Straight

 

Interlocked
Distinct and very fine figure
Straight

Texture

Even or uniform
Fine
Uniform
Resinous and oily
Fine to medium
Medium
Fine

Natural Growth Defects

Gum and mineral deposits

Natural Durability

Durable
Very durable
Resistant to attack from termites (Isoptera)
Resistant to attack from marine borers
Resistant to attack from powder post (Lyctid & Bostrychid) beetles

Kiln Schedules

Dry at a slow speed
Kiln Drying Rate (in days) is rapid
UK=J US=T10D5S/T8D4S Fr=4
Dry at a moderate speed

Drying Defects

Slight surface checking

Ease of Drying

Easy

Kiln Drying Rate

Rapid (<10 days for boards < 32 mm, to <30 days for boards >= 63 mm)

Tree Identification

Bole/stem form is unknown
Bole/stem form is not buttressed

Blunting Effect

Blunting effect on machining is severe

Boring

Easy

Cutting Resistance

Cutting Resistance with dry wood is difficult

Gluing

Easy to glue

Mortising

Easy to mortise

Moulding

Good finishing results
Easy to mould

Movement in Service

Fair to Good Stability – Medium Movement
Medium
Stable

Nailing

Difficult to nail
Possible if prebored

Planing

Planes well, to a good finish
Difficult to plane
Easy to plane

Resistance to Impregnation

Resistant sapwood
Resistant heartwood
Heartwood is extremely resistant

Resistance to Splitting

Very Poor

Response to Hand Tools

Difficult to machine

Turning

Good results
Easy to turn

Veneering Qualities

Veneers easily
Suitable for peeling
Veneers moderately easy

Steam Bending

Moderate

Polishing

Satisfactory results
Good results

Staining

Finish is generally satisfactory

Varnishing

Good results

Strength Properties

Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Modulus of Elasticity (stiffness) = medium
High
Mor/Bending strength = medium
Hardness (side grain) = hard
53-60 lbs/cu. ft.
53-60 lbs/cu. ft.
Shearing strength (parallel to grain) = high
Medium
Density (dry weight) = 61-67 lbs/cu. ft.
Density (dry weight) = 61-67 lbs/cu. ft.
Very hard
Toughness-Hammer drop (Impact Strength) = low
Medium
Max. crushing strength = very high
Low
Low
High
46-52 lbs/cu. ft.
46-52 lbs/cu. ft.
Very high
Small
38-45 lbs/cu. ft.
38-45 lbs/cu. ft.

Numerical Data

Item Green Dry English
Bending Strength 9547 14879 psi
Density 54 lbs/ft3
Hardness 2524 lbs
Impact Strength 34 inches
Maximum Crushing Strength 7596 10755 psi
Shearing Strength 2384 psi
Stiffness 1665 1923 1000 psi
Weight 53 43 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 4 %
Item Green Dry Metric
Bending Strength 671 1046 kg/cm2
Density 865 kg/m3
Hardness 1144 kg
Impact Strength 86 cm
Maximum Crushing Strength 534 756 kg/cm2
Shearing Strength 167 kg/cm2
Stiffness 117 135 1000 kg/cm2
Weight 849 689 kg/m3
Radial Shrinkage 2 %

References
Banks, C.H., Schoeman, J.P., Otto, K.P.,1977,The Mechanical Properties of Timbers with particular reference to South,Africa,South African Forestry Research Institute Bulletin,(Ed.,Schoeman, J.P. 1973 & Otto K.P. 1976,No.48

Banks, C.H.,1954,The Mechanical Properties of Timbers with Particular Reference to those,grown in the Union of South Africa,Journal of the South African Forestry Association,No. 24 pp.44-65,[South,African Forestry Journal]

Bois et Forets des Tropiques,1978,Kosipo – Entandrophragma candollei,Bois et Forets des Tropiques No.181,pp29-40

Bois, P.J.,1966,The Strength Properties of Tanzania Timbers,Tanzania Forest Div. Util. Sec. Moshi Tech. Note, No.35

Bolza, E., Keating, W.G.,1972,African Timbers – the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building Research

Bryce, J.M.,1967,Commercial Timbers of Tanzania,Tanzanian Forestry Division Util. Sec. Moshi

Duff, C.E.,1944,Termite Resistance Test on the Copperbelt of Northern Rhodesia,Empire Forestry Journal,23(2,pp160-2

Fanshawe, D.B.,1962,Fifty Common Trees of Northern Rhodesia,Natural Resources Board and Forestry Department, Ndola

Ferreirinha, M.P.,1955,Catalogo des Madeiras de Mocambique (pt 1,Min. do Ultramar Junta Invest. do Ultranar Memorias Serie Botanica, 2

Goldsmith, B., Carter, D.T.,1981,The Indigenous Timbers of Zimbabwe,Forestry Commission, Zimbabwe Research Bulletin No.9

Marshall, R.C.,1939,Silviculture of the trees of Trinidad and Tobago – British West Indies,O.U.P.,London

McCoy-Hill, M.,1955,Timbers of Tanganyika – Afrormosia and East African Mahogany,Timber Technology,63(2196, pp538-9

Murira, K.,1984,Natural Durability Tests of Tanzanian Timbers 1955 – 1982,Tanzania Forestry Research Institute, Timber Utilisation Research Centre,,Moshi.

Pardy, A.A.,1952,Notes on Indigenous Trees and Shrubs of S. Rhodesia – Afrormosia,angolensis,Ministry of Agriculture and Lands S. Rhodesia Bulletin,No.1675

Storrs, A.E.G.,1979,Know your Trees – Some of the Common Trees found in Zambia,Zambia Forestry Department, Ndola

Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7

Tanzania Forest Department,1960,The Natural Durability of Local Timbers,Tanzanian Forest Dept. Tech. Note,No.14

Tanzania Forest Department,1966,Flooring Timbers,Tanzania Forest Div. Util. Sec. Moshi – Timbers of Tanganyika

Tanzania Forest Division,1966,Afrormosia angolensis (East African Afrormosia – Mbanga,Tanzania Forest Div. Util. Sec. Moshi – Timbers of Tanganyika

Tanzania Forest Division,1966,Kiln Drying Schedules for Tanzania Timbers Technical Note no.38,Tanzania Forest Div. Util. Sec. Moshi

White, F.,1962,Forest Flora of Northern Rhodesia,O.U.P. London