American Balsa Wood

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American Balsa Wood
Categories:	Wood and Natural Products; Wood; Hardwood
Material Notes:	High buoyancy value, and good insulating value Usual surface texture: Fine Dimensional changes when dried lumber is subjected to variations in humidity during service: Small Resistance to fungal decay (Heartwood in ground contact): Perishable (Under 5 years) Resistance to penetration by preservatives: Resistant Common Applications: Useful for heat sound and vibration insulation. Buoyancy aids
Key Words:	Ochroma pyramidale; Lumber, Timber
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Physical Properties	Metric	English	Comments

Specific Gravity	0.160 g/cc	0.160 g/cc	Green
Density	0.160 g/cc	0.00578 lb/in³	15% Moisture Content. Density can vary by 20% or more.

Mechanical Properties	Metric	English	Comments
Modulus of Rupture	0.0216 GPa	3.13 ksi	Static Bending, 12% Moisture
Flexural Modulus	3.40 GPa	493 ksi	Static Bending, 12% Moisture
Compressive Strength	14.9 MPa	2160 psi	Parallel to Grain, 12% Moisture
Poissons Ratio	0.0090	0.0090	µ_TL, 12% Moisture Content
	0.018	0.018	µ_RL, 12% Moisture Content
	0.229	0.229	µ_LR, 12% Moisture Content
	0.231	0.231	µ_TR, 12% Moisture Content
	0.488	0.488	µ_LT, 12% Moisture Content
	0.665	0.665	µ_RT, 12% Moisture Content
Machinability	100 %	100 %	Good Relative to Other Wood
Shear Strength	2.10 MPa	305 psi	Parallel to Grain, 12% Moisture
Work to Maximum Load	0.0140 J/cm³	2.03 in-lb/in³	Static Bending, 12% Moisture

Thermal Properties	Metric	English	Comments
Thermal Conductivity	0.0400 W/m-K	0.278 BTU-in/hr-ft²-°F	at density of 0.11 g/cc; perpendicular
Shrinkage	3.0 %	3.0 %	Radial Shrinkage Green to Oven Dry
	7.6 %	7.6 %	Tangential Shrinkage Green to Oven Dry
	10.8 %	10.8 %	Volumetric Shrinkage Green to Oven Dry

Descriptive Properties
Color	White		Usual for heartwood

References for this datasheet.

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PTSA670 / 71273

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