North American Elm Wood

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North American Elm Wood
Categories:	Wood and Natural Products; Wood; Hardwood
Material Notes:	Good strength, toughness and bending properties Ring-Porous Hardwood. Data is based on small, clear, air-dried samples unless specified. Usual surface texture: Coarse Dimensional changes when dried lumber is subjected to variations in humidity during service: Medium Resistance to fungal decay (Heartwood in ground contact): Non-durable (5 to 10 years) Resistance to penetration by preservatives: Moderately Resistant Common Applications: Furniture, coffins, rubbing strips Property values marked by an asterisk (*) have been taken from an unusually old reference source.
Key Words:	Ulmus americana; Lumber, Timber
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Physical Properties	Original Value	Comments

Density	0.460 g/cc	Oven Dry Weight/Unseasoned Volume
	54.0 lb/ft³	Unseasoned*

Mechanical Properties	Original Value	Comments
Hardness, Wood Indentation	2400 N	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	2700 N	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	3700 N	Side
Tensile Strength, Ultimate	4.60 MPa	Perpendicular to Grain
	560 psi	Perpendicular to Grain*
Modulus of Rupture	0.0510 GPa	Static Bending
	6.90 ksi	Static Bending*
Flexural Yield Strength	3600 psi	Fiber Stress at Elastic Limit; Static Bending*
Flexural Modulus	9.20 GPa	Static Bending
	1030 ksi	Static Bending*
Compressive Strength	4.80 MPa	Perpendicular to Grain
	38.0 MPa	Parallel to Grain
	390 psi	Perpendicular to Grain*
	2290 psi	Parallel to Grain*
	2880 psi	Max Crushing Strength Parallel to Grain*
Machinability	50 %	Medium Relative to Other Wood
Shear Strength	10.4 MPa	Orientation Unknown
	920 psi	Parallel to Grain*
Impact	2.9	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	8100	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	0.830 in-lb/in³	Static Bending*
Work to Maximum Load	11.0 in-lb/in³	Static Bending*
Cleavage	37.0 kN/m	Radial surface of failure, Unseasoned*
	47.0 kN/m	Tangential surface of failure, Unseasoned*

Thermal Properties	Original Value	Comments
Thermal Conductivity	0.860 BTU-in/hr-ft²-°F	Oven Dry
	1.00 BTU-in/hr-ft²-°F	12% Moisture Content
Shrinkage	4.2 %	Radial; Green to Zero Moisture
	9.5 %	Tangential; Green to Zero Moisture
	14.6 %	Volumetric; Green to Zero Moisture

Descriptive Properties
Color	Pale reddish-brown	Usual for heartwood

References for this datasheet.

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PTSA110 / 71249

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