American Yellow Birch Wood

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American Yellow Birch Wood
Categories:	Wood and Natural Products; Wood; Hardwood
Material Notes:	Diffuse-Porous Hardwood. Least easy to work with hand tools. Very good steam bending, fair 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:	Betula alleghaniensis; Lumber, Timber
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Physical Properties	Metric	English	Comments

Density	0.550 g/cc	0.0199 lb/in³	Oven Dry Weight/Unseasoned Volume
	0.913 g/cc	0.0330 lb/in³	Unseasoned*
Cell Length	1.50 mm	0.0591 in	Mature Wood

Mechanical Properties	Metric	English	Comments
Hardness, Wood Indentation	3300 N	742 lb (f)	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	3600 N	809 lb (f)	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	5600 N	1260 lb (f)	Side
Tensile Strength, Ultimate	3.31 MPa	480 psi	Perpendicular to Grain*
	6.30 MPa	914 psi	Perpendicular to Grain
Modulus of Rupture	0.0593 GPa	8.60 ksi	Static Bending*
	0.115 GPa	16.7 ksi	In Bending
Flexural Yield Strength	31.7 MPa	4600 psi	Fiber Stress at Elastic Limit; Static Bending*
	69.6 MPa	10100 psi	Bending stress at proportional limit
Flexural Modulus	10.6 GPa	1540 ksi	Static Bending*
	13.8 - 13.9 GPa	2000 - 2020 ksi	In Bending
Compressive Strength	3.10 MPa	450 psi	Perpendicular to Grain*
	6.70 MPa	972 psi	Perpendicular to Grain
	19.0 MPa	2760 psi	Parallel to Grain*
	23.9 MPa	3460 psi	Max Crushing Strength Parallel to Grain*
	56.0 - 56.3 MPa	8120 - 8170 psi	Parallel to Grain
Poissons Ratio	0.024	0.024	µ_TL, 12% Moisture Content
	0.043	0.043	µ_RL, 12% Moisture Content
	0.426	0.426	µ_TR, 12% Moisture Content
	0.426	0.426	µ_LR, 12% Moisture Content
	0.451	0.451	µ_LT, 12% Moisture Content
	0.697	0.697	µ_RT, 12% Moisture Content
Shear Strength	7.65 MPa	1110 psi	Parallel to Grain*
	13.0 MPa	1890 psi	Orientation Unknown
Impact	4.5	4.5	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	11700	11700	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	0.00552 J/cm³	0.800 in-lb/in³	Static Bending*
Work to Maximum Load	0.114 J/cm³	16.6 in-lb/in³	Static Bending*
Toughness	56.5 J	41.7 ft-lb	Radial
	70.1 J	51.7 ft-lb	Tangential
Cleavage	50.0 kN/m	285 lb/in	Tangential surface of failure, Unseasoned*
	51.0 kN/m	291 lb/in	Radial surface of failure, Unseasoned*

Thermal Properties	Metric	English	Comments
Specific Heat Capacity	0.390 J/g-°C	0.0932 BTU/lb-°F
Thermal Conductivity	0.144 W/m-K	1.00 BTU-in/hr-ft²-°F	Oven Dry
	0.173 W/m-K	1.20 BTU-in/hr-ft²-°F	12% Moisture Content
	0.173 W/m-K	1.20 BTU-in/hr-ft²-°F
Shrinkage	7.2 %	7.2 %	Radial; Green to Zero Moisture
	9.2 %	9.2 %	Tangential; Green to Zero Moisture
	16.7 %	16.7 %	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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