American Black Walnut


The sapwood of walnut is creamy white, while the heartwood is light brown to dark chocolate brown, occasionally with a purplish cast and darker streaks. Walnut is usually supplied steamed, which darkens the sapwood, but a very unique look can also be achieved by leaving it natural. The wood is generally straight grained, but sometimes with wavy or curly grain that produces an attractive and decorative figure. The dark heartwood will lighten in colour as it ages overtime with exposure to UV light.

Properties: Walnut is a tough, hard timber of medium density, with moderate bending and crushing strengths and low stiffness. It works easily with hand and machine tools, and nails, screws and glues well. It holds paints and stains well and can be polished to an exceptional finish. It performs best when dried slowly, reducing the opportunity for degrades. Walnut has good dimensional stability.

Durability: Rated as moderately durable and one of the most durable woods.

Common uses: Furniture, cabinet making, architectural interiors, high class joinery, doors, flooring, gunstocks and panelling. A favoured wood for use in contrast with lighter coloured timbers.

Download American Black Walnut Information Sheet

Botanical Name: Juglans nigra L
Other Names: Black Walnut
Origin: North America
  • Overview
  • Basic Info
  • Technical


Seasoning: Dries slowly with a tendency to honeycomb.
Working Qualities: Typically easy to work provided the grain is straight and regular. Planer tear out can sometimes be a problem when surfacing pieces with irregular or figured grain. Glues, stains, and finishes well, (though walnut is rarely stained). Responds well to steam bending.
Uses: Furniture, cabinetry, architectural interiors, floors, gunstocks, interior paneling, veneer, turned items, and other small wooden objects and novelties.
Price (1-10): 7


Availability: Stocked in Random Width 25mm and 50mm thick boards.
Stocked: Yes
Grade Description: Prime A North American grade for a board to provide 83.3% (10/12ths) clear cuttings of either 3" x 7' or 4" x 5'. This means that defects such as knots, splits and wane are permitted, but in small quantities. Suitable for furniture and joinery.


Primary Suppliers: Cole Hardwoods, Baillie Lumber


Durability In Ground: Perishable/Non Durable
Durability Above Ground: Moderately Durable


Density Air Dry: 600 kg/m3


Shrinkage Radial: 6 %
Shrinkage Tangental: 8 %


Stability Kiln Dry: good dimensional stability

Mechanical Properties

Janka Hardness: 4.5 kN
Modulus of Rupture: 101 MPa
Modulus of Elasticity: 12 GPa
Max Crush Strength: 52 MPa


ASTM Flame Spread: 130 - 140

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