The American Black walnut was usually called American walnut, or Black walnut for short. Native in North America only, very different from European walnut varieties, some of which are grown in Ontario, Canada, but not enough for commercial harvesting. Usually grown in the same area as juglans cinerea or white walnut.
One of the most important uses of walnut is the application of walnut veneer and solid wood sawn wood. This contrasts sharply with other tree species, especially locust wood, maple and oak. American walnut can be replaced by American eucalyptus , because the latter one also has similar wood-grain pattern. However, eucalyptus only match with the walnut by dyeing.
The difference between sapwood and heartwood is slightly obvious and edge narrow. Semi-ring pore material, the growth ring is obvious.
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Common Name(s): Black Walnut
Scientific Name: Juglans nigra
Distribution: Eastern United States
Tree Size: 100-120 ft (30-37 m) tall, 2-3 ft (.6-1 m) trunk diameter
Average Dried Weight: 38 lbs/ft3 (610 kg/m3)
Specific Gravity (Basic, 12% MC): .51, .61
Janka Hardness: 1,010 lbf (4,490 N)
Modulus of Rupture: 14,600 lbf/in2 (100.7 MPa)
Elastic Modulus: 1,680,000 lbf/in2 (11.59 GPa)
Crushing Strength: 7,580 lbf/in2 (52.3 MPa)
Shrinkage: Radial: 5.5%, Tangential: 7.8%, Volumetric: 12.8%, T/R Ratio: 1.4
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