Malas - Homalium foetidum (Roxb.) Benth.

Malas makes up approximately 9% of the total log exports of Papua New Guinea. It is somewhat similar to the Mahogany range of timbers, having good working and finishing properties. The colour makes it easily distinguishable from other timber species and as a finished product it gives something different.

  • The Heartwood is brown, reddish brown or sometimes yellow-brown. The sapwood is slightly paler and not distinctly demarcated merging into the darker heartwood. The grain is usually straight but in some cases can be deeply interlocked. It is virtually un-figured with a fine and even texture.
  • The timber season well with a risk of checking on back sawn material, and has a tenancy to twist slightly. All material should be quarter sawn to avoid degrade. However, quarter sawn boards are still at risk of slight edge checking which is generally shallow and can easily be removed by dressing.
  • Malas presents no conversion problems considering its density and has little blunting effect on tools. It requires pre-boring before nailing to prevent end split; planes and machines to a smooth finish and bends well in steaming.
  • Malas is a high density timber and has value in uses such as heavy construction, wharf and bridge decking, flooring, boat building, truck bodies, scantling, turnery, sleepers, joinery, piles, posts, poles and tool handles.
Names
Family:
Flacourtiaceae
Species:
Homalium foetidum (Roxb.) Benth.
Standard Trade Names:
Malas
Other Names:
Aranga (Philippines) malasata (Solomon Is.) petaling, padang, selimbar (Malaya) gia (Indonesia) Burma lancewood (U.K)
PROPERTIES
Density:
740-840 Kg/m3 @ 12% m.c
Colour:
Light red to red brown.
Texture:
Fine and even.
Grain:
Straight or shallowly interlocked, sometimes can be deeply interlocked .
Figure:
Virtually un-figured.
Durability:
Class 3: Moderately Durable
Permeability:
Class 2: Sapwood is permeable and heartwood is reasonably uniform to pressure impregnation
WORKABILITY
General:
Very soft and easy to work with if blades are kept sharp.
Sawing:
Cutting resistance is reported to be easy, relative to the density of the timber.
Planing:
Excellent characteristics; produces a smooth surface.
Blunting:
Low
Boring:
Fairly easy.
Turning:
Good turning properties.
Nailing:
Requires pre-boring.
Gluing:
Glues satisfactorily.
Finishing:
Stain and polishes well.
MECHANICAL PROPERTIES
Strength:
SD2
Structural Grade:
F34(select grade).
Hardness(Janka):
9.5kN (seasoned), 7.2kN (unseasoned).
Max. Crushing Strength:
84MPa (seasoned), 55Mpa (unseasoned).
Modulus of Elasticity:
19GPa (seasoned), 16GPa (unseasoned).
Modulus of Rupture:
152MPa (seasoned), 105MPa (unseasoned).
SEASONING
General:
Seasons well, some risk of checking.
Movement:
Very low
Shrinkage:
Low