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Woodworking Math

Tropical wood · Southeast Asia and Oceania

White Chuglam wood

White Chuglam (Terminalia bialata, family Combretaceae) is a tropical timber from Southeast Asia and Oceania. Dry, its Janka hardness is 1,190 lbf (5,293 N), and air-dry it weighs about 43 lb/ft³ (689 kg/m³). The figures are from the USDA Forest Products Laboratory's Tropical Timbers of the World, pp. 747–748.

Other names, by country: Indian Silver Greywood (Indian name for darker, usually figured wood).

Key numbers

Janka hardness, dry
1,190 lbf (5,293 N)
Green: 995 lbf (4,426 N)
As printed: “Janka side hardness 995 lb for green material and 1,190 lb for dry.”
Air-dry density
43 lb/ft³ (689 kg/m³)
Basic specific gravity
0.58 oven-dry weight, green volume
As printed: “Basic specific gravity (ovendry weight/green volume) 0.58; air-dry density 43 pcf.”
Shrinkage, green to oven-dry
7.4% tangential
Radial 5.4%, volumetric 13.2%

One source: USDA Forest Products Laboratory, Tropical Timbers of the World (Chudnoff, 1979 edition), the only published source read for this wood

Strength

Bending strength is the modulus of rupture (MOR); stiffness is the modulus of elasticity (MOE); crushing strength is compression parallel to the grain. The sheet collects these from published tests: it prints 2 data sets, from different tests and sources, so they can differ widely; all are shown, in the sheet's order, each at the moisture content printed beside it, never restated as 12%.

MoistureBending strength (MOR)Stiffness (MOE)Crushing strength
Green11,050 psi (76 MPa)1.76 million psi (12.1 GPa)5,585 psi (39 MPa)
13% MC13,525 psi (93 MPa)2.01 million psi (13.9 GPa)6,810 psi (47 MPa)

A dash means the sheet prints no value; none is filled in.

What the data sheet says

Color, grain and texture
Bright chrome yellow aging to grayish-yellow, sometimes light nut-brown, olive-brown, or yellow-brown with irregular dark streaks; sapwood often very wide and not differentiated. Grain generally straight; texture medium to coarse; lustrous; without characteristic odor or taste.
Working properties
Easy to saw and machine and to work with hand tools; dresses to a smooth finish; nailing and gluing are satisfactory.
Durability
Classified as moderately durable but is susceptible to pinhole borer and powder-post beetle attack.
Uses
Furniture, cabinetwork, paneling, flooring, ships' fittings.
Where it grows
Andaman Islands.

Quoted from Tropical Timbers of the World, pp. 747–748, a USDA Forest Products Laboratory work in the public domain.

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Sources

  1. USDA Forest Products Laboratory, Tropical Timbers of the World (Chudnoff, USDA Forest Products Laboratory, 1979 edition), read 2026-11-07.

How the tags work: How we source every number.