| a．Machine properties (air-dried, parallel to fibers） |
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Origin |
type | specific gravity | Compression strength [kg/cm2] |
Bending strength [kg/cm2] |
Tensile strength [kg/cm2] |
Shear strength [kg/cm2] |
Elastic modulus [t/cm2] |
Quality of Hard Wood [cm] |
|---|---|---|---|---|---|---|---|---|
| Day Book |
Red kashi Red pine Spruce Quercus crispula |
0.90 0.60 0.45 0.80 |
510 520 460 460 |
1,110 730 590 790 |
1,220 570 490 900 |
120 82 59 79 |
110 57〜140 43〜110 59〜110 |
0.03 3.0 3.0 0.06 |
| Kaede
4 / 5,000
Translation results
Maple Wig Larch |
0.72 0.50 0.65 |
564 500 640 |
910 700 830 |
821 540 700 |
114 70 90 |
57〜126 72〜90 98〜110 |
― 0.09 0.15 |
|
| Chestnut Black pine Zelkova |
0.60 0.60 0.75 |
350 440 530 |
580 700 870 |
600 520 880 |
64 76 97 |
49〜110 ― 84〜110 |
3.0 3.0 0.06 |
|
| Spanish mackerel Sea Route White oak Japanese Cedar |
0.35 0.65 0.90 0.40 |
340 510 640 400 |
470 820 1,180 580 |
280 930 1,250 450 |
49 87 123 52 |
38〜57 ― 76〜86 57〜130 |
3.0 0.06 0.03 3.0 |
|
| bamboo And Spruce |
0.40 0.45 0.60 |
667 370 550 |
1,460 580 750 |
1,610 580 580 |
― 63 83 |
― 42〜86 57〜86 |
― 3.0 3.0 |
|
| Cypress Hinoki Leaf Himeko pine |
0.50 0.50 0.50 |
520 380 370 |
800 600 630 |
570 550 550 |
72 72 69 |
77〜130 53〜110 60〜86 |
3.0 3.0 ― |
|
| Beech Hou Fir Wild cherry tree |
0.75 0.45 0.45 0.65 |
490 390 450 530 |
950 730 640 880 |
870 640 510 740 |
98 80 65 100 |
57〜89 57〜86 42〜110 57〜110 |
0.30 3.0 3.0 0.24 |
|
| North Rice |
Rice Cedar Rice Toga Rice cypress Rice pine |
0.40 0.50 0.50 0.50 |
370 375 415 480 |
570 615 675 770 |
590 630 690 740 |
59 63 69 64 |
70 99 84 110 |
2.27 2.17 2.00 2.10 |
| South Rice |
Red Lauan White lauan cheek |
0.60 0.50 0.60 |
410 430 340 |
870 780 790 |
100 110 70 |
1.09 |
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| [Note]Hardness is the diameter 3cm Steel ball4,000kg It is the depth of Kubomi when it is press-fitted in, and the shape of the grain and the plank is about the same, but smaller than the shape of Kiguchi.。 |
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| b．Other properties（About air-drying material） |
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| Calorific value[kcal/kg] | Japanese average 4,500 | |||||||
| Thermal conductivity[kcal/mh℃] | 0.1(vertical) 0.7(beside) | |||||||
| Ignition and ignition[℃] | Conifer average 257、Hardwood average 263、Fire protection treatment 320 | |||||||
| Electrical resistance[Ω/cm2-cm] | Raw material 7,500、Desiccant 750,000,000 | |||||||
| Shinbi・Shrinking[％] | In a water content state below the fiber saturation point, it expands and contracts as the water content increases and decreases.
(a)A change in humidity of 1% at room temperature changes the water content by 0.25%. (b)A change in moisture content of 1% changes the air-dried length at the following rate.。 If S = air-dry specific density (Plank)0.55S、 (Masa eyes)0.30S、 (Fiber direction)0.03S、 |
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| References: "Engineer's Must-Have Mechanical Design Handbook" (Revised by Saburo Kano) Characteristics of industrial materials Non-metal materials Page 559 Quoted from the properties of wood. | ||||||||