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.
- Odlat utanför Europa och importerat via europeiska partnerlager.
- Botanisk grupp. Barrträ kommer från barrträd, lövträ från bredbladiga träd.
- Den botaniska familj som träslaget tillhör.
Få besked när det kommer inReferensträslag. Inga plankor i lager just nu.
Passar det ditt projekt?
Passar bra för
- 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
Ingen Black Walnut i det aktuella släppet
Liknande träslag i lager
Ingen Black Walnut just nu. De här träslagen passar samma projekt och finns i lager.
Få besked om Black Walnut
Vi skickar e-post när nya plankor i Black Walnut kommer till KORENA. Varje exemplar är unikt, så det är bra att få besked tidigt.
Träets utseende
Så ser det ut
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.
Bearbetning
Så bearbetas det
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.
Ytbehandling
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.
Torkning
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.
Hur mycket kommer det att röra sig?
Trä sväller och krymper över bredden när luften blir fuktigare och torrare. Beräkna årstidsrörelsen hos en skiva i Black Walnut innan du utformar infästningarna.
Förväntad årstidsrörelse
cirka 9,1 mm
Fäst skivan med sargar eller beslag med spår, inte med lim eller hårt åtdragna skruvar.
Linjär krympningsmodell: bredd × (krympning ÷ 28 % fibermättnad) × årstidsvariation i fuktkvot. Använder 8 % tangentiell krympning för Black Walnut. Ett planeringsvärde, inte en garanti.
Vad det kostar
Säkerhet och inköp
- Odlat utanför Europa och importerat via europeiska partnerlager.
- Status på IUCN:s rödlista: den globala bedömningen av träslagets bevarandestatus.
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.
Läs hela guidenFördjupning om ådring, färgförändring, bearbetning och stabilitet.
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.
Köparnas frågor
Frågor som köpare ställer
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?
Mekaniska egenskaper
Tekniska data
Publicerade referensvärden. När källorna skiljer sig åt visas intervallet och det typiska värdet används i skalorna ovan.
| Densitet (kg/m³)Massa per kubikmeter vid cirka 12 % fuktkvot. Tyngre trä är oftast hårdare och starkare. | 560–660 kg/m³typiskt 610 kg/m³ |
|---|---|
| Janka-hårdhet (N)Kraften som krävs för att pressa in en stålkula halvvägs i träet. Standardmåttet på motstånd mot märken. | 4,100–4,900 Ntypiskt 4 490 N |
| MOR: böjhållfasthet (MPa)Böjhållfasthet: belastningen då en balk går av. | 100–110 MPa |
| MOE: elasticitetsmodul (GPa)Böjstyvhet: hur mycket en hylla eller skiva böjer ned under belastning. | 11.0–12.0 GPa |
| Radiell krympningKrympning tvärs årsringarna, från rått till ugnstorrt. Kvartssågade brädor rör sig så här. | 5.0–6.0 % |
| Tangentiell krympningKrympning längs årsringarna. Plainsågade brädor och de flesta plankor rör sig så här. |
