Black Walnut

Description

American Black Walnut is a North American hardwood that is used for interiors such as furniture, flooring, gunstock blanks, and other wood products.  Walnut has a warm rich chocolate brown color with hints of dark purple.  Walnut can be steamed or left unsteamed, and generally has a straight grain.   Walnut can be easily worked with both hand and machine tools, painted and stained, as well as polished for an exceptional finish. Walnut has a medium density, moderate bending, low stiffness and has good dimensional stability, which means it is one of the most durable hardwoods of North America. 

Common Name(s): Black Walnut

Scientific Name: Juglans nigra

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

Sizes:

Rough Sawn: sold in board size

⁴/₄ refers to a 1-inch-thick (25 mm) board

⁵/₄ refers to a 1¹/₄ -inch-thick (31.8 mm) board

⁶/₄ refers to a 1 ½ -inch-thick (38.1 mm) board

⁸/₄ refers to a 2-inch-thick (51 mm) board

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