American Western Hemlock Wood

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American Western Hemlock Wood
Categories:	Wood and Natural Products; Wood; Softwood
Material Notes:	Obtainable in large sizes Softwood. Relatively easy to work with hand tools. Data is based on small, clear, air-dried samples unless specified. Usual surface texture: Fine Dimensional changes when dried lumber is subjected to variations in humidity during service: Small Resistance to fungal decay (Heartwood in ground contact): Non-durable (5 to 10 years) Resistance to penetration by preservatives: Resistant Common Applications: Construction, joinery Property values marked by an asterisk (*) have been taken from an unusually old reference source.
Key Words:	Tsuga heterophylla; Lumber, Timber
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Physical Properties	Metric	English	Comments

Density	0.380 g/cc	0.0137 lb/in³	Oven Dry Weight/Unseasoned Volume
	0.305 - 0.508 g/cc	0.0110 - 0.0184 lb/in³	at nominal specific gravity. Coast Mountains-region (Canada) origin
	0.358 - 0.577 g/cc	0.0129 - 0.0208 lb/in³	at oven-dry state. Coast Mountains-region (Canada) origin
	0.371 - 0.605 g/cc	0.0134 - 0.0219 lb/in³	at 12.0% m.c. Coast Mountains-region (Canada) origin
	0.657 g/cc	0.0237 lb/in³	Unseasoned*
Moisture Absorption at Equilibrium	2.5 - 3.5 %	2.5 - 3.5 %	Between 40% RH and 90% RH. Coast Mountains-region (Canada) origin

Mechanical Properties	Metric	English	Comments
Hardness, Wood Indentation	1900 N	427 lb (f)	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	2400 N	540 lb (f)	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	2400 N	540 lb (f)	Side
Tensile Strength, Ultimate	1.79 MPa	260 psi	Perpendicular to Grain*
	2.10 MPa	305 psi	Perpendicular to Grain
Modulus of Rupture	0.0421 GPa	6.10 ksi	Static Bending*
	0.0700 GPa	10.2 ksi	In Bending
Flexural Yield Strength	23.4 MPa	3400 psi	Fiber Stress at Elastic Limit; Static Bending*
	46.9 MPa	6800 psi	Bending stress at proportional limit
Flexural Modulus	8.20 GPa	1190 ksi	Static Bending*
	10.28 GPa	1491 ksi	In Bending
Compressive Strength	2.41 MPa	350 psi	Perpendicular to Grain*
	4.70 MPa	682 psi	Perpendicular to Grain
	15.8 MPa	2290 psi	Parallel to Grain*
	19.9 MPa	2890 psi	Max Crushing Strength Parallel to Grain*
	42.7 - 43.0 MPa	6190 - 6240 psi	Parallel to Grain
Poissons Ratio	0.382	0.382	µ_TR, 12% Moisture Content. Coast Mountains-region (Canada) origin
	0.423	0.423	µ_LT, 12% Moisture Content. Coast Mountains-region (Canada) origin
	0.442	0.442	µ_RT, 12% Moisture Content. Coast Mountains-region (Canada) origin
	0.485	0.485	µ_LR, 12% Moisture Content. Coast Mountains-region (Canada) origin
Machinability	100 %	100 %	Good Relative to Other Wood
Shear Strength	5.58 MPa	810 psi	Parallel to Grain*
	8.10 MPa	1170 psi	Orientation Unknown
Impact	2.4	2.4	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	7800	7800	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	0.00400 J/cm³	0.580 in-lb/in³	Static Bending*
Work to Maximum Load	0.0414 J/cm³	6.00 in-lb/in³	Static Bending*
Toughness	15.8 J	11.7 ft-lb	Radial
	23.8 J	17.6 ft-lb	Tangential

Thermal Properties	Metric	English	Comments
Thermal Conductivity	0.111 W/m-K	0.770 BTU-in/hr-ft²-°F	Oven Dry
	0.135 W/m-K	0.940 BTU-in/hr-ft²-°F	12% Moisture Content
Shrinkage	4.3 %	4.3 %	Radial; Green to Zero Moisture
	7.9 %	7.9 %	Tangential; Green to Zero Moisture
	11.9 %	11.9 %	Volumetric; Green to Zero Moisture

Descriptive Properties
Color	Pale Brown		Usual for heartwood

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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