Castanea sativa
Sweet Chestnut
A lighter, softer cousin of oak. Tannin-rich heartwood gives it real durability outdoors, but those same tannins react with iron, so fixings need to be stainless or brass.
- Užauginta ir nukirsta Europoje.
- Botaninė grupė. Spygliuočių mediena gaunama iš spygliuočių, lapuočių mediena iš plačialapių medžių.
- Botaninė šeima, kuriai priklauso rūšis.
Pranešti, kai atsirasŽinyno medienos rūšis. Šiuo metu vienetų neturime.
Ar tinka jūsų projektui?
Puikiai tinka
- External cladding and rainscreens
- Interior wall and ceiling panelling
- Barn-style and rustic furniture frames
- Garden furniture and pergolas
- Coopered tanks, vats, and planters
- Beams and exposed structural framing
Dabartinėje kolekcijoje Sweet Chestnut nėra
Turimos panašios medienos rūšys
Šiuo metu Sweet Chestnut nėra. Šios medienos rūšys tinka tiems patiems projektams, o jų vienetų turime.
Gaukite pranešimus apie Sweet Chestnut
Parašysime jums, kai KORENA pasirodys naujų Sweet Chestnut storlenčių. Kiekvienas vienetas yra vienetinis, todėl verta sužinoti iš anksto.
Medienos išvaizda
Kaip atrodo
Straight-grained and coarse-textured, with prominent ring-porous figure that reads as oak at a glance. Heartwood is a warm honey-brown that ambers with age; sapwood is a narrow pale band. Lacks oak's strong medullary rays, so quartersawn faces are calmer and less flecked.
- Heartwood: warm honey to mid-brown, ambers with age
- Sapwood: narrow, pale cream to light straw
- Fumed: deep chocolate to near-black with ammonia
- Oiled: pulls warmer and slightly redder than oak
- Weathered outdoors: silver-grey patina within 1–2 seasons
- Straight grain, coarse texture; resembles oak.
Apdirbimas
Apdirbimas
Saws and planes well with sharp tooling. Softer than oak, so it dents more easily but is also kinder on edges. Splits readily when screwed near ends or edges, pre-drill and countersink. Glues and steam-bends predictably. Turning is workable but the coarse grain can tear on end-grain cuts.
Apdaila
Takes oil, hardwax, and water-based finishes cleanly. Open pores benefit from a grain filler if you want a glass-flat surface, or leave them open for a tactile, oak-like read. Fuming with ammonia darkens it deeply thanks to the high tannin content. Test stains on offcuts, tannins can pull cool tones grey.
Džiovinimas
Dries slowly and is prone to ring shake and honeycomb if pushed. Air-dry to around 25–30% MC before kilning, then run a gentle schedule. Movement in service is moderate, tangential shrinkage near 7% means wide boards want room to move in panels and tabletops.
Kiek mediena brinks ir trauksis?
Kintant oro drėgnumui, mediena skersai pločio brinksta ir traukiasi. Prieš projektuodami tvirtinimus apskaičiuokite numatomą sezoninį Sweet Chestnut stalviršio pokytį.
Numatomas medienos brinkimas ir traukimasis per sezoną
apie 7,7 mm
Stalviršį tvirtinkite laikikliais arba gembėmis su pailgomis angomis, ne klijais ar stipriai suveržtais varžtais.
Linijinio nuodžiūvio modelis: plotis × (nuodžiūvis ÷ 28 % plaušo soties riba) × sezoninis drėgnio pokytis. Sweet Chestnut skaičiuojamas taikant 6,75 % tangentialinis nuodžiūvį. Tai planavimo įvertis, ne garantija.
Kiek kainuoja
Sauga ir tiekimas
- Užauginta ir nukirsta Europoje.
- IUCN raudonojo sąrašo statusas: pasaulinis šios rūšies apsaugos būklės vertinimas.
Dust is a reported skin and respiratory sensitiser, extract at source and wear a fitted mask when sanding or routing. Heartwood is rated food-contact safe once finished. Critical detail: chestnut tannins react with iron and produce black staining wherever the two meet in the presence of moisture. Use stainless steel or brass fixings, and keep iron tooling off damp stock.
Skaityti visą vadovąIšsamios pastabos apie tekstūrą, spalvos pokyčius, apdirbimą ir stabilumą.
What Sweet Chestnut actually is#
Castanea sativa is often sold as the light alternative to oak, and for appearance and durability that description holds. It is ring porous with a similar grain pattern, it carries a similar warm brown colour, and at decay class 2 it is genuinely durable outdoors.
Where the comparison breaks down is hardness. At 3,010 N Janka chestnut is the softest hardwood in this catalogue apart from black poplar, softer than Scots Pine and less than two thirds as hard as oak. Anyone expecting oak-like wear resistance from an oak-like appearance will be disappointed.
The other difference is visible: chestnut lacks oak's prominent rays, so a quartersawn chestnut board shows no ray fleck.
Ring shake, which is the thing to inspect for#
Chestnut is notably prone to ring shake, a separation along a growth ring inside the log.
The problem is that it frequently does not show on a rough sawn face. A board looks sound, gets machined, and the shake opens into a crescent shaped split that follows the ring and effectively ruins it.
This is the main reason chestnut yields far less usable timber than the abundance of the tree suggests, and it is the main reason to look carefully rather than quickly at a chestnut slab. Check end grain for any ring separation, and look along the length in raking light for a crescent line.
Vartotojų klausimai
Vartotojų klausimai
How is Sweet Chestnut different from oak?
It looks similar and is durable like oak, but it is much lighter and softer at 590 kg per cubic metre and 3,010 N Janka against 675 and 4,980 for European oak. Chestnut also lacks the prominent rays, so it has no ray fleck on quartersawn faces. It is often described as oak without the weight, which is fair for appearance and durability but not for hardness.
What is ring shake and why does it matter in chestnut?
A separation along a growth ring inside the log, which chestnut is particularly prone to. It may be invisible on a rough sawn surface and open up after machining, effectively ruining a board. It is the main reason chestnut yields less usable timber than its abundance suggests, and the main thing to inspect for when buying.
Can it be used outdoors?
Yes. At decay class 2 it is durable, and its high tannin content gives real resistance to rot. Chestnut has been the traditional European timber for fencing, cladding, shingles and outdoor structures for centuries, and coppiced chestnut fence posts are still a standard product.
Does it stain black like oak?
Mechaninės savybės
Techniniai duomenys
Paskelbtos orientacinės vertės. Jei šaltiniai nesutampa, nurodomas intervalas, o pirmiau pateiktoms skalėms naudojama tipinė vertė.
| Tankis (kg/m³)Vieno kubinio metro svoris esant maždaug 12 % drėgniui. Sunkesnė mediena paprastai yra kietesnė ir stipresnė. | 540–650 kg/m³tipinė vertė 590 kg/m³ |
|---|---|
| Kietumas pagal Janka (N)Jėga, kurios reikia plieniniam rutuliukui įspausti į medieną iki pusės. Standartinis atsparumo įspaudams matas. | 2,700–3,300 Ntipinė vertė 3 010 N |
| MOR: stipris lenkiant (MPa)Stipris lenkiant: apkrova, kuriai veikiant sija lūžta. | 70–85 MPa |
| MOE: tamprumo modulis (GPa)Standumas lenkiant: kiek lentyna ar stalviršis įlinksta nuo apkrovos. | 8.0–10.0 GPa |
| Radialinis nuodžiūvisNuodžiūvis skersai rievių nuo žalios iki visiškai sausos būklės. Taip keičiasi radialinio pjūvio lentos. | 3.5–4.5 % |
| Tangentialinis nuodžiūvis |
