North American Eastern Cottonwood Wood

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North American Eastern Cottonwood Wood
Categories:	Wood and Natural Products; Wood; Hardwood
Material Notes:	Diffuse-Porous Hardwood. 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 deltoides; Lumber, Timber
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Physical Properties	Metric	English	Comments

Density	0.370 g/cc	0.0134 lb/in³	Oven Dry Weight/Unseasoned Volume
	0.785 g/cc	0.0284 lb/in³	Unseasoned*
Cell Length	1.00 mm	0.0394 in	Mature Wood

Mechanical Properties	Metric	English	Comments
Hardness, Wood Indentation	1500 N	337 lb (f)	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	1700 N	382 lb (f)	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	1900 N	427 lb (f)	Side
Tensile Strength, Ultimate	2.83 MPa	410 psi	Perpendicular to Grain*
	4.00 MPa	580 psi	Perpendicular to Grain
Modulus of Rupture	0.0365 GPa	5.30 ksi	Static Bending*
	0.0590 GPa	8.56 ksi	Static Bending
Flexural Yield Strength	20.0 MPa	2900 psi	Fiber Stress at Elastic Limit; Static Bending*
Flexural Modulus	6.96 GPa	1010 ksi	Static Bending*
	9.45 GPa	1370 ksi	Static Bending
Compressive Strength	1.65 MPa	240 psi	Perpendicular to Grain*
	3.30 MPa	479 psi	Perpendicular to Grain
	12.2 MPa	1770 psi	Parallel to Grain*
	15.7 MPa	2280 psi	Max Crushing Strength Parallel to Grain*
	34.0 MPa	4930 psi	Parallel to Grain
Poissons Ratio	0.018	0.018	µ_TL, 12% Moisture Content
	0.043	0.043	µ_RL, 12% Moisture Content
	0.292	0.292	µ_TR, 12% Moisture Content
	0.344	0.344	µ_LR, 12% Moisture Content
	0.42	0.42	µ_LT, 12% Moisture Content
	0.875	0.875	µ_RT, 12% Moisture Content
Shear Strength	4.69 MPa	680 psi	Parallel to Grain*
	6.40 MPa	928 psi	Orientation Unknown
Impact	2.3	2.3	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	7200	7200	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	0.00338 J/cm³	0.490 in-lb/in³	Static Bending*
Work to Maximum Load	0.0503 J/cm³	7.30 in-lb/in³	Static Bending*

Thermal Properties	Metric	English	Comments
Thermal Conductivity	0.102 W/m-K	0.710 BTU-in/hr-ft²-°F	Oven Dry
	0.122 W/m-K	0.850 BTU-in/hr-ft²-°F	12% Moisture Content
Shrinkage	3.9 %	3.9 %	Radial; Green to Zero Moisture
	9.2 %	9.2 %	Tangential; Green to Zero Moisture
	14.1 %	14.1 %	Volumetric; Green to Zero Moisture

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 view all the property values for this datasheet as they were originally entered into MatWeb.

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