North American Engelmann Spruce Wood

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North American Engelmann Spruce Wood
Categories:	Wood and Natural Products; Wood; Hardwood
Material Notes:	Softwood with resin canals. 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:	Picea engelmannii; Lumber, Timber
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Physical Properties	Original Value	Comments

Density	0.350 g/cc	Air Dry (12-15% Moisture Content)
Cell Length	3.00 mm	Mature Wood

Mechanical Properties	Original Value	Comments
Hardness, Wood Indentation	1700 N	Side
Tensile Strength, Ultimate	2.40 MPa	Perpendicular to Grain
	88.0 MPa	Axial
Modulus of Rupture	0.0640 GPa	Static Bending
	4.20 ksi	Static Bending*
Flexural Yield Strength	2500 psi	Fiber Stress at Elastic Limit; Static Bending*
Flexural Modulus	8.90 GPa	Static Bending
Compressive Strength	2.80 MPa	Perpendicular to Grain
	31.0 MPa	Parallel to Grain
	290 psi	Perpendicular to Grain*
	1740 psi	Parallel to Grain*
	1980 psi	Max Crushing Strength Parallel to Grain*
Poissons Ratio	0.058	µ_TL, 12% Moisture Content
	0.083	µ_RL, 12% Moisture Content
	0.255	µ_TR, 12% Moisture Content
	0.422	µ_LR, 12% Moisture Content
	0.462	µ_LT, 12% Moisture Content
	0.53	µ_RT, 12% Moisture Content
Shear Strength	8.30 MPa	Orientation Unknown
	590 psi	Parallel to Grain*
Toughness	12.5 J	Radial
	20.4 J	Tangential
Cleavage	19.0 kN/m	Radial surface of failure, Unseasoned*
	24.0 kN/m	Tangential surface of failure, Unseasoned*

Thermal Properties	Original Value	Comments
Thermal Conductivity	0.630 BTU-in/hr-ft²-°F	Oven Dry
	0.750 BTU-in/hr-ft²-°F	12% Moisture Content
Shrinkage	3.4 %	Radial; Green to Zero Moisture
	6.6 %	Tangential; Green to Zero Moisture
	10.4 %	Volumetric; Green to Zero Moisture

References for this datasheet.

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PTSA120 / 71250

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