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മരത്തിന്റെ കടുപ്പം ടെസ്റ്റുചെയ്യുന്നതിനുള്ള ഒരു രീതിയാണ് ജങ്ക കടുപ്പ പരീക്ഷണം (Janka hardness test). 11.28 മില്ലീമീറ്റർ വ്യാസമുള്ള ഒരു സ്റ്റീൽ ഉണ്ട അതിന്റെ പകുതിയോളം ഒരു മരത്തടിയിൽ അടിച്ചുകയറ്റാൻ വേണ്ടിവരുന്ന ബലത്തിന്റെ അളവാണ് ഇതിൽ പരീക്ഷിക്കുന്നത്. പൊതുവേ നിലത്തുവിരിക്കാനുള്ള മരത്തിന്റെ കടുപ്പം പരീക്ഷിക്കാനാണ് ഇത് ഉപയോഗിക്കുന്നത്.
മരത്തിന്റെ ഇനം | (ശക്തി പൗണ്ടിൽ) | |
---|---|---|
Australian Buloke[1] | 5060 | |
Schinopsis brasiliensis, Quebracho, Barauna, Chamacoco[2] | 4800 | |
Schinopsis balansae, Quebracho Colorado, Red Quebracho[3] | 4570 | |
Lignum vitae, Guayacan, Pockenholz | 4500 | |
Piptadenia Macrocarpa, Curupay, Angico Preto, Brazilian Tiger Mahogany | 3840 | |
Snakewood, Letterhout, Piratinera Guinensis | 3800 | |
Brazilian Olivewood | 3700 | |
Brazilian Ebony | 3692 | |
Ipê, Brazilian Walnut, Lapacho | 3684 | |
African Pearwood, Moabi | 3680 | |
Grey Ironbark | 3664 | |
Bolivian Cherry | 3650 | |
Lapacho | 3640 | |
Cumaru, Brazilian Teak | 3540 | |
Sucupira, Brazilian Chestnut, Tiete Chestnut | 3417 | |
Ebony | 3220 | |
Massaranduba, Brazilian Redwood, Paraju | 3190 | |
Yvyraro | 3040 | |
Strand Woven Bamboo | 3000 | |
Bloodwood | 2900 | |
Red Mahogany, Turpentine | 2697 | |
Live Oak | 2680 | |
Southern Chestnut | 2670 | |
Spotted Gum | 2473 | |
Brazilian Cherry, Jatoba | 2350 | |
Mesquite | 2345 | |
Golden Teak | 2330 | |
Guatambú, Kyrandy, Balfourodendron riedelianum | 2240 | |
Santos Mahogany, Bocote, Cabreuva, Honduran Rosewood | 2200 | |
Pradoo | 2170 | |
Brazilian Koa | 2160 | |
Brushbox | 2135 | |
Osage Orange[4] | 2040 | |
Karri | 2030 | |
Sydney Blue Gum | 2023 | |
Bubinga | 1980 | |
Cameron | 1940 | |
Tallowwood | 1933 | |
Merbau | 1925 | |
Amendoim | 1912 | |
Jarrah | 1910 | |
Purpleheart | 1860 | |
Goncalo Alves, Tigerwood | 1850 | |
Hickory, Pecan, Satinwood | 1820 | |
Afzelia, Doussie, Australian Wormy Chestnut | 1810 | |
Bangkirai | 1798 | |
Rosewood | 1780 | |
African Padauk | 1725 | |
Blackwood | 1720 | |
Merbau | 1712 | |
Kempas | 1710 | |
Black Locust | 1700 | |
Highland Beech | 1686 | |
Wenge, Red Pine, Hornbeam | 1630 | |
Tualang | 1624 | |
Zebrawood | 1575 | |
True Pine, Timborana | 1570 | |
Peroba | 1557 | |
Sapele, Sapelli, Kupa'y | 1510 | |
Curupixa | 1490 | |
Sweet Birch | 1470 | |
Hard maple, Sugar Maple | 1450 | |
Caribbean Walnut | 1390 | |
Kentucky coffeetree | 1390 | |
Natural Bamboo (represents one species) | 1380 | |
Australian Cypress | 1375 | |
White Oak | 1360 | |
Tasmanian oak | 1350 | |
Ribbon Gum | 1349 | |
Ash (White) | 1320 | |
American Beech | 1300 | |
Red Oak (Northern) | 1290 | |
Caribbean Heart Pine | 1280 | |
Yellow Birch, Iroko | 1260 | |
Movingui | 1230 | |
Heart pine | 1225 | |
Carapa guianensis, Brazilian Mesquite | 1220 | |
Larch | 1200 | |
Carbonized Bamboo (represents one species) | 1180 | |
Teak | 1155 | |
Cocobolo | 1136 | |
Brazilian Eucalyptus, Rose Gum | 1125 | |
English Oak [5] | 1120 | |
Makore | 1100 | |
Siberian Larch | 1100 | |
Peruvian Walnut | 1080 | |
Boreal | 1023 | |
Black Walnut, North American Walnut | 1010 | |
Cherry | 995 | |
Black Cherry, Imbuia | 950 | |
Red Maple[6] | 950 | |
Boire | 940 | |
Paper Birch | 910 | |
Eastern Red Cedar | 900 | |
Southern Yellow Pine (Longleaf) | 870 | |
Lacewood, Leopardwood | 840 | |
African Mahogany | 830 | |
Mahogany, Honduran Mahogany | 800 | |
Parana | 780 | |
Sycamore | 770 | |
Box Elder | 720 | |
Shedua | 710 | |
Radiata Pine[7] | 710 | |
Silver Maple[8] | 700 | |
Southern Yellow Pine (Loblolly and Shortleaf) | 690 | |
Douglas Fir | 660 | |
Western Juniper | 626 | |
Alder (Red) | 590 | |
Larch | 590 | |
Chestnut | 540 | |
Hemlock | 500 | |
Western White Pine | 420 | |
Basswood | 410 | |
Eastern White Pine | 380 | |
Balsa | 100 | |
Cuipo | 22 |
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