American Rock Elm Wood

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American Rock Elm Wood
Categories:	Wood and Natural Products; Wood; Hardwood
Material Notes:	Ring-Porous Hardwood. Least easy to work with hand tools. Very good 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:	Ulmus thomasii; Lumber, Timber
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Physical Properties	Original Value	Comments

Density	0.570 g/cc	Oven Dry Weight/Unseasoned Volume
	44.0 lb/ft³	Unseasoned*

Mechanical Properties	Original Value	Comments
Hardness, Wood Indentation	4400 N	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	4400 N	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
Tensile Strength, Ultimate	660 psi	Perpendicular to Grain*
Modulus of Rupture	0.102 GPa	In Bending
	9.50 ksi	Static Bending*
Flexural Yield Strength	55.2 MPa	Bending stress at proportional limit
	4600 psi	Fiber Stress at Elastic Limit; Static Bending*
Flexural Modulus	10.3 GPa	In Bending
	1190 ksi	Static Bending*
Compressive Strength	4.80 MPa	Perpendicular to Grain
	38.0 - 49.0 MPa	Parallel to Grain
	750 psi	Perpendicular to Grain*
	2870 psi	Parallel to Grain*
	3780 psi	Max Crushing Strength Parallel to Grain*
Shear Strength	1270 psi	Parallel to Grain*
Impact	4.1	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	11000	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	1.20 in-lb/in³	Static Bending*
Work to Maximum Load	19.8 in-lb/in³	Static Bending*

Thermal Properties	Original Value	Comments
Thermal Conductivity	0.300 BTU-in/hr-ft²-°F	12% Moisture Content, US origin
	1.00 BTU-in/hr-ft²-°F	Oven Dry, US origin
Shrinkage	4.8 %	Radial, from green to oven dry, US origin
	8.1 %	Tangential, from green to oven dry, US origin
	8.1 %	Tangential; Unseasoned to Oven Dry*
	14.9 %	Volumetric, from green to oven dry, US origin

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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