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Common Name(s): Balsa
Scientific Name: Ochroma pyramidale
Distribution: Tropical regions of the Americas; also grown on plantations
Tree Size: 60-90 ft (18-28 m) tall, 3-4 ft (1-1.2 m) trunk diameter
Average Dried Weight: 9 lbs/ft3 (150 kg/m3)
Specific Gravity (Basic, 12% MC): .12, .15
Janka Hardness: 90 lbf (390 N)
Modulus of Rupture: 2,840 lbf/in2 (19.6 MPa)
Elastic Modulus: 538,000 lbf/in2 (3.71 GPa)
Crushing Strength: 1,690 lbf/in2 (11.6 MPa)
Shrinkage: Radial: 2.3%, Tangential: 6.0%, Volumetric: 8.5%, T/R Ratio: 2.6
balsa-endgrain-zoom-s.jpg (46.59 KB, 下载次数: 7)
2015-12-20 17:05 上传
找来一块轻木，拍了张照片。
balsa1.jpg (18.45 KB, 下载次数: 8)
2015-12-20 17:03 上传
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发表于 2016-3-2 09:48:20
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