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) … Continue reading Black Walnut