American Black Cottonwood Wood

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American Black Cottonwood Wood
Categories:	Wood and Natural Products; Wood; Hardwood
Material Notes:	Hardwood. Relatively easy to work with hand tools. Fair steam bending, poor planing, poor shaping. Data is based on small, clear, air-dried samples unless specified. Property values marked by an asterisk (*) have been taken from an unusually old reference source.
Key Words:	Populus trichocarpa; Lumber, Timber
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Physical Properties	Original Value	Comments

Density	0.350 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Wood Indentation	1100 N	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	1200 N	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
Tensile Strength, Ultimate	270 psi	Perpendicular to Grain*
Modulus of Rupture	0.0570 GPa	In Bending
	4.80 ksi	Static Bending*
Flexural Yield Strength	36.5 MPa	Bending stress at proportional limit
	2900 psi	Fiber Stress at Elastic Limit; Static Bending*
Flexural Modulus	9.00 - 9.45 GPa	In Bending
	1070 ksi	Static Bending*
Compressive Strength	3.30 MPa	Perpendicular to Grain
	30.3 - 34.0 MPa	Parallel to Grain
	200 psi	Perpendicular to Grain*
	1770 psi	Parallel to Grain*
	2160 psi	Max Crushing Strength Parallel to Grain*
Shear Strength	600 psi	Parallel to Grain*
Impact	2.2	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	6800	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	0.440 in-lb/in³	Static Bending*
Work to Maximum Load	5.00 in-lb/in³	Static Bending*

Thermal Properties	Original Value	Comments
Thermal Conductivity	0.600 BTU-in/hr-ft²-°F	Oven Dry
	0.720 BTU-in/hr-ft²-°F	12% Moisture Content
Shrinkage	3.6 %	Radial, from green to oven dry
	8.6 %	Tangential, from green to oven dry
	12.4 %	Volumetric, from green to oven dry

References for this datasheet.

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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