Categories: Wood and Natural Products; Wood

Material Notes: Plywood is made of several thin layers, or 'plies' that are laminated together. The layer structure leads to more uniform properties than solid wood, since the effects of grain anisotropy are minimized. The properties of plywood vary with the quality of the constituent layers; typical values of sheathing grade are listed below.

Key Words: Timber, Lumber
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Physical PropertiesMetricEnglishComments
Specific Gravity 0.400 - 0.600 g/cc0.400 - 0.600 g/cc
Mechanical PropertiesMetricEnglishComments
Tensile Strength 27.6 - 34.5 MPa4000 - 5000 psiparallel to face; ASTM D3500
Modulus of Rupture 0.0483 - 0.0689 GPa7.00 - 10.0 ksiparallel to face; ASTM D3043
Flexural Modulus 8.20 - 10.3 GPa1190 - 1490 ksiparallel to face; ASTM D3043
Compressive Strength 31.0 - 41.4 MPa4500 - 6000 psiparallel to face; ASTM D3501
Shear Modulus 0.138 - 0.207 GPa20.0 - 30.0 ksiin plane (rolling shear)
 0.586 - 0.758 GPa85.0 - 110 ksithrough thickness (edgewise shear)
Shear Strength 1.72 - 2.07 MPa250 - 300 psiin plane (rolling shear)
 5.52 - 6.89 MPa800 - 1000 psithrough thickness (edgewise shear
Thermal PropertiesMetricEnglishComments
CTE, linear 6.10 µm/m-°C
@Temperature 20.0 °C
3.39 µin/in-°F
@Temperature 68.0 °F
parallel to face
Thermal Conductivity 0.110 - 0.147 W/m-K0.760 - 1.02 BTU-in/hr-ft²-°Fat 12% moisture; depends on wood species
Descriptive Properties
Linear Hygroscopic Expansion< 0.020%30 - 90% RH

References for this datasheet.

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