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.
- Buiten Europa geteeld en via Europese partnerwerven geïmporteerd.
- Botanische groep. Naaldhout komt van coniferen en loofhout van loofbomen.
- De botanische familie waartoe de houtsoort behoort.
Ontvang bericht zodra het binnenkomtReferentiehoutsoort. Momenteel geen stukken op voorraad.
Is dit geschikt voor uw project?
Zeer geschikt voor
- 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
Geen Black Walnut in de huidige uitgifte
Vergelijkbare houtsoorten op voorraad
Momenteel is er geen Black Walnut. Deze houtsoorten zijn geschikt voor dezelfde projecten en zijn wel beschikbaar.
Bericht ontvangen over Black Walnut
We sturen u een e-mail wanneer nieuwe boomstambladen van Black Walnut bij KORENA binnenkomen. Elk stuk is uniek, dus tijdig bericht is belangrijk.
Uiterlijk van het hout
Hoe het eruitziet
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.
Bewerking
Bewerking
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.
Afwerking
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.
Drogen
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.
Hoeveel zal het werken?
Hout zwelt en krimpt over de breedte wanneer de lucht vochtiger en droger wordt. Schat de seizoenswerking van een blad van Black Walnut voordat u de bevestigingen ontwerpt.
Verwachte seizoenswerking
ongeveer 9,1 mm
Bevestig het blad met bladwervels of sleufbeugels, niet met lijm of strak aangedraaide schroeven.
Lineair krimpmodel: breedte × (krimp ÷ 28 % vezelverzadiging) × seizoensverschil in vochtgehalte. Gebruikt 8 % tangentiële krimp voor Black Walnut. Dit is een planningsschatting, geen garantie.
Wat het kost
Veiligheid en herkomst
- Buiten Europa geteeld en via Europese partnerwerven geïmporteerd.
- Status op de Rode Lijst van IUCN: de wereldwijde beoordeling van de beschermingsstatus van deze houtsoort.
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.
Lees de volledige gidsUitgebreide informatie over tekening, kleurverandering, bewerking en stabiliteit.
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.
Vragen van kopers
Vragen van kopers
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?
Mechanische eigenschappen
Technische gegevens
Gepubliceerde referentiewaarden. Als bronnen uiteenlopen, wordt het bereik getoond en wordt de gebruikelijke waarde gebruikt voor de bovenstaande schalen.
| Dichtheid (kg/m³)Massa per kubieke meter bij ongeveer 12 % vochtgehalte. Zwaarder hout is meestal harder en sterker. | 560–660 kg/m³gebruikelijk 610 kg/m³ |
|---|---|
| Janka-hardheid (N)De kracht die nodig is om een stalen kogel tot de helft in het hout te drukken. Dit is de standaardmaat voor weerstand tegen deuken. | 4,100–4,900 Ngebruikelijk 4.490 N |
| MOR: breukmodulus (MPa)Buigsterkte: de belasting waarbij een balk breekt. | 100–110 MPa |
| MOE: elasticiteitsmodulus (GPa)Buigstijfheid: hoeveel een plank of blad onder belasting doorbuigt. | 11.0–12.0 GPa |
| Radiale krimpKrimp dwars op de groeiringen, van vers tot ovendroog. Kwartiers gezaagde planken werken volgens deze waarde. | 5.0–6.0 % |
| Tangentiële krimp |
