Mora Yellow

Specs

Common Names

Mora

Scientific Name

Mora excelsa, M. gonggrijpii

Origin

Northeastern South America (primarily Guyana and Suriname)

Appearance

Heartwood is light to medium reddish brown. Wide pale yellow-brown sapwood is clearly demarcated from heartwood. Has a straight to interlocked grain, with a medium to coarse texture. Good natural luster. Endgrain: Diffuse-porous; large pores in no specific arrangement, few; solitary and radial multiples of 2-3; heartwood deposits present; narrow rays faintly visible without lens, normal spacing; parenchyma vasicentric,lozenge, winged, confluent, and marginal.

Avg. Dried Weight

63 lbs/ft3 (1,015 kg/m3)

Janka Hardness

2300 lbf

Modulus of Rupture

22,550 lbf/in2 (155.5 MPa)

Elastic Modulus

2,790,000 lbf/in2 (19.24 GPa)

Crushing Strength

11,950 lbf/in2 (82.4 MPa)

Shrinkage

Radial: 6.7%, Tangential: 9.9%, Volumetric: 17.7%, T/R Ratio: 1.5

Durability

Mora is rated as durable to very durable, and also has good resistance to insect attacks.

Workability

Pieces with interlocked grain can be difficult to work, frequently resulting in tearout during machining operations. Mora also has a pronounced blunting effect on cutting edges.