Juglans nigra
Black Walnut
American Black Walnut is the chocolate-brown hardwood that built mid-century furniture. Imported into European yards as kiln-dried slabs, it works cleanly and finishes to a deep, warm tone that ages well.
- Audzēta ārpus Eiropas un importēta caur Eiropas noliktavām.
- Botāniskā grupa. Skujkoki ir koniferi, bet lapu koki ir platlapji.
- Botāniskā dzimta, kurai pieder suga.
Paziņot, kad būs pieejamsAtsauces suga. Pašlaik noliktavā nav pieejamu gabalu.
Vai tā ir piemērota jūsu projektam?
Lieliski piemērota
- Live-edge dining and conference tables
- Mid-century-style casework and credenzas
- Dark-toned kitchen islands and breakfast bars
- Desks and writing tables with figured tops
- Gunstocks, knife scales and high-end tool handles
- Turned bowls and hollow forms
Pašreizējā kolekcijā nav Black Walnut
Līdzīgas sugas noliktavā
Pašlaik nav Black Walnut. Šīs sugas ir piemērotas tiem pašiem projektiem, un to gabali ir pieejami.
Saņemt paziņojumus par Black Walnut
Mēs nosūtīsim e-pasta ziņojumu, kad KORENA būs pieejami jauni Black Walnut dēļi. Katrs gabals ir vienreizējs eksemplārs, tāpēc ir vērts uzzināt laikus.
Koksnes izskats
Kā tā izskatās
Heartwood ranges from chocolate brown to a purplish or greyish brown, often with darker streaks. Sapwood is pale cream, usually steamed at the mill to even out the contrast, but you'll still see some on wide slabs. Grain is generally straight, though figured boards (curl, crotch, burl) turn up regularly and command a premium. Medium, even texture takes detail well.
- Chocolate to purplish-brown heartwood
- Pale cream sapwood, often steamed for uniformity
- Darker streaks and figure on wider boards
- Lightens slightly under UV over the first year
- Deepens and warms under oil finishes
- Generally straight; can be irregular or wavy. Medium texture.
Apstrāde
Apstrāde
Easy across the board. Sawing, planing, sanding, turning and carving all rate 4 out of 5. Glues and screws without complaint. Steam bending is the one weak spot (3/5), workable for gentle curves, not the species you'd choose for tight bentwood seating. Sharp tooling keeps the surface clean; dull blades will burnish rather than tear.
Apdare
Finishes beautifully with very little fuss. Hard wax oil and Danish oil deepen the brown without muddying the grain; a thin shellac seal coat helps if you're spraying lacquer over oily patches. Sanded to 180–220 it feels silky in the hand. Black walnut lightens slightly with UV exposure over the first year, the opposite of cherry, so a UV-inhibiting topcoat helps on pieces near windows.
Žāvēšana
Slabs arrive kiln-dried to roughly 8–10% MC. Movement in service is moderate, radial 5.0–6.0%, tangential 7.5–8.5%, so wide tops still want a breathable build (breadboard ends, slot-screwed cleats, or fixed-and-floating fasteners). Acclimatise to your shop for two to three weeks before final flattening.
Cik daudz tā kustēsies?
Mainoties gaisa mitrumam, koksne šķērsām platumam uzbriest un saraujas. Pirms stiprinājumu projektēšanas novērtējiet Black Walnut galda virsmas sezonālo koka kustību.
Paredzamā sezonālā koka kustība
aptuveni 9,1 mm
Stipriniet galda virsmu ar stiprinājumiem vai kronšteiniem rievās, nevis ar līmi vai cieši pievilktām skrūvēm.
Lineārā rukuma modelis: platums × (rukums ÷ 28% šķiedras piesātinājums) × sezonālā mitruma svārstība. Black Walnut izmanto 8% tangenciālais rukumu. Plānošanas aplēse, nevis garantija.
Cik tā maksā
Drošība un iegāde
- Audzēta ārpus Eiropas un importēta caur Eiropas noliktavām.
- IUCN Sarkanā saraksta statuss: sugas globālais aizsardzības novērtējums.
Walnut dust contains juglone and is a known respiratory and skin sensitiser. Run a dust extractor at the source and wear a P3/FFP3 mask when sanding. Juglone-laden offcuts and shavings are toxic to horses and to some plants (tomatoes, apples), so don't compost or use as bedding. Cured finished surfaces are food-contact safe.
Lasīt pilno ceļvediPlašākas piezīmes par koksnes zīmējumu, krāsas maiņu, apstrādi un izmēru stabilitāti.
What Black Walnut actually is#
Juglans nigra is the darkest wood in this catalogue and the North American counterpart to European walnut. Where Juglans regia is a lighter grey brown full of streaking, black walnut is a deeper, more uniform chocolate.
The other significant difference is commercial rather than botanical. Black walnut is grown as a forestry species across eastern North America, so it comes in larger, straighter, more consistent sizes than European walnut, much of which is salvaged from orchards and gardens. If you need matched material across several wide boards, black walnut is the easier species to source.
The steaming question, which matters more than most people realise#
A large proportion of commercial black walnut is steamed during kiln drying.
Steaming drives colour out of the dark heartwood and into the pale sapwood. The result is a board that reads more uniformly brown, with the sapwood muddied to a dull tan rather than staying cream. For a factory producing matched furniture components, that uniformity is the point.
For a live edge slab it is usually the opposite of what you want. The sharp contrast between pale cream sapwood and near black heartwood is one of the most striking features this species offers, and steaming destroys it.
Unsteamed black walnut keeps that contrast. It is worth asking which you are being offered, because the difference is permanent and not visible from a description alone.
Pircēju jautājumi
Pircēju jautājumi
How is Black Walnut different from European Walnut?
Black walnut, Juglans nigra, is darker and more uniformly chocolate brown, where European walnut runs lighter grey brown with more streaking and marbling. Black walnut is slightly softer at 4,490 N against 5,410 N but slightly stiffer at 11.0 GPa. Black walnut also comes in larger, more consistent sizes because it is grown as a forestry species rather than an orchard tree.
Is Black Walnut steamed, and does it matter?
Much commercial American black walnut is steamed during drying, which drives colour from the dark heartwood into the pale sapwood and makes the board look more uniformly brown. Unsteamed walnut keeps a sharp contrast between cream sapwood and dark heartwood. For a live edge slab where the sapwood line is a feature, unsteamed is usually what you want, and it is worth asking.
Does Black Walnut fade?
Yes. Like European walnut it lightens with light exposure rather than darkening, mellowing from deep chocolate toward a warmer, lighter brown. This is the opposite of what oak and cherry do. A UV inhibiting finish slows it without stopping it.
Is walnut dust dangerous?
Mehāniskās īpašības
Tehniskie dati
Publicētas atsauces vērtības. Ja avoti atšķiras, parādīts diapazons, bet iepriekšējās skalās izmantota tipiskā vērtība.
| Blīvums (kg/m³)Svars uz kubikmetru pie aptuveni 12% mitruma. Smagāka koksne parasti ir cietāka un stiprāka. | 560–660 kg/m³tipiskā vērtība 610 kg/m³ |
|---|---|
| Janka cietība (N)Spēks, kas vajadzīgs, lai tērauda lodīti līdz pusei iespiestu koksnē. Standarta iespiedumu pretestības mērs. | 4,100–4,900 Ntipiskā vērtība 4490 N |
| MOR: lieces stiprība (MPa)Lieces stiprība: slodze, pie kuras sija lūst. | 100–110 MPa |
| MOE: elastības modulis (GPa)Lieces stingrība: cik daudz plaukts vai galda virsma izliecas zem slodzes. | 11.0–12.0 GPa |
| Radiālais rukumsRukums šķērsām augšanas gredzeniem no svaigi zāģēta līdz absolūti sausam stāvoklim. Šādi kustas radiāla griezuma dēļi. | 5.0–6.0 % |
| Tangenciālais rukumsRukums gar augšanas gredzeniem. Šādi kustas tangenciāla griezuma dēļi un vairums dēļu. |
