North American Slippery Elm (Red Elm) Wood

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North American Slippery Elm (Red Elm) Wood
Categories:	Wood and Natural Products; Wood; Hardwood
Material Notes:	Ring-Porous Hardwood Property values marked by an asterisk (*) have been taken from an unusually old reference source.
Key Words:	Ulmus rubra; Lumber, Timber
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Physical Properties	Original Value	Comments

Density	0.480 g/cc	Oven Dry Weight/Unseasoned Volume
	56.0 lb/ft³	Unseasoned*

Mechanical Properties	Original Value	Comments
Hardness, Wood Indentation	2900 N	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	3300 N	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
Tensile Strength, Ultimate	650 psi	Perpendicular to Grain*
Modulus of Rupture	8.00 ksi	Static Bending*
Flexural Yield Strength	4000 psi	Fiber Stress at Elastic Limit; Static Bending*
Flexural Modulus	1230 ksi	Static Bending*
Compressive Strength	510 psi	Perpendicular to Grain*
	2840 psi	Parallel to Grain*
	3320 psi	Max Crushing Strength Parallel to Grain*
Shear Strength	1110 psi	Parallel to Grain*
Impact	3.4	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	9200	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	0.820 in-lb/in³	Static Bending*
Work to Maximum Load	15.4 in-lb/in³	Static Bending*
Cleavage	70.0 kN/m	Radial surface of failure, Unseasoned*
	74.0 kN/m	Tangential surface of failure, Unseasoned*

Thermal Properties	Original Value	Comments
Thermal Conductivity	0.880 BTU-in/hr-ft²-°F	Oven Dry
	1.10 BTU-in/hr-ft²-°F	12% Moisture Content
Shrinkage	4.9 %	Radial; Unseasoned to Oven Dry*
	8.9 %	Tangential; Unseasoned to Oven Dry*
	13.8 %	Volumetric; Unseasoned to Oven Dry*

References for this datasheet.

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PTSA160 / 71254

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