Niangon

Scientific name:
Heritiera utilis Kosterm; H. densiflora Kosterm
Geographic origin:
West Africa and Central Africa
  • Sapwood: greyish bown
  • Heartwood: varies from reddish brown to pink brown.
  • Fiber: Straight, generally slightly intertwined
  • Grain: medium size to rough
Niangón
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Impregnabilidad Propiedades mecanicas Mecanizacion logo Propiedades fisicas logo
Capacity of being impregnated
  • Sapwood: Low capacity of being impregnated
  • Heartwood: No capable of being impregnated
Mechanical properties
  • Resistance to static flexion 1,150 kg/cm2 &;8226; Elasticity module 105,000 kg/cm2
  • Resistance to compression 550 kg/cm2
Mechanization
  • Sawing process: Easy, except in those cases of oil presence that can cause allergies.
  • Drying process: Speed can vary from medium to high speed. Low to medium risks of deformation and crack formation.
  • Planing process: Difficulties arise from risk of repelling due to frequently intertwined fibers.
  • Gluing process: No difficulties.
  • Nailing and screwing process: No difficulties.
  • Finish: No difficulties, except in those cases of oil stain existance, that must be eliminated with a solvent.
Physical properties
  • Apparent density at 12% humidity 680 kg/m3 semi-heavy wood
  • Dimensional stability
  • - Volumetric contraction coefficient 0.47 % nervous wood
  • - Relation between contractions 2.2 con bastante tendency to deformity
  • Hardness (Chaláis-Meudon) 3.1 semi-hardwood
Observations
  • Habitualment són troncs de petit diàmetre i retorçats, pel que és difícil aconseguir bons amples i llargs