Birch, gray

(Betula populifolia)

Common Name(s): Gray Birch

Scientific Name: Betula populifolia

Distribution: Northeastern North America

Tree Size: 20-40 ft (6-12 m) tall, 1 ft (.3 m) trunk diameter

Average Dried Weight: 35 lbs/ft3 (560 kg/m3)

Specific Gravity (Basic, 12% MC): .45, .56

Janka Hardness: 760 lbf (3,380 N)

Modulus of Rupture: 9,800 lbf/in2 (67.6 MPa)

Elastic Modulus: 1,150,000 lbf/in2 (7.93 GPa)

Crushing Strength: 4,870 lbf/in2 33.6- MPa)

Shrinkage: Radial: 5.2%, Tangential: 9.5%, Volumetric: 14.7%, T/R Ratio: 1.8

Color/Appearance: Heartwood tends to be a light reddish brown, with nearly white sapwood. Occasionally figured pieces are available with a wide, shallow curl similar to the curl found in Cherry. There is virtually no color distinction between annual growth rings, giving Birch a somewhat dull, uniform appearance.

Grain/Texture: Grain is generally straight or slightly wavy, with a fine, even texture. Low natural luster.

Endgrain: Diffuse-porous; primarily radial multiples;  medium pores in no specific arrangement, moderately numerous to numerous; parenchyma marginal, and sometimes diffuse-in-aggregates (faintly visible with lens);  narrow rays, spacing fairly close to close.

Rot Resistance: Birch is perishable, and will readily rot and decay if exposed to the elements. The wood is also susceptible to insect attack.

Workability: Generally easy to work with hand and machine tools, though boards with wild grain can cause grain tearout during machining operations. Turns, glues, and finishes well.

Odor: No characteristic odor.

Allergies/Toxicity: Birch in the Betula genushas been reported as a sensitizer. Usually most common reactions simply include skin and respiratory irritation. See the articles Wood Allergies and Toxicityand Wood Dust Safetyfor more information.

Pricing/Availability: Likely to be rather economical in most instances. Figured boards can be more expensive, but normally plain birch lumber is in the same price range as mapleor oak.

Sustainability: This wood species is not listed in the CITES Appendices or on the IUCN Red List of Threatened Species.

Common Uses: Plywood, boxes, crates, turned objects, interior trim, and other small specialty wood items.

Comments: Birch is one of the most widely used woods for veneer and plywood worldwide. Besides regular sheets of plywood, Birch veneer is also used for doors, furniture, and paneling.

Gray Birch (sanded)

Gray Birch (sealed)

Gray Birch (endgrain)

Gray Birch (endgrain 10x)

None of the above content is our original work and all credit (and any errors or omissions) is due www.wood-database.com.
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