Appearance of American Black Walnut
The heartwood of American black walnut ranges from golden brown to dark chocolate, occasionally displaying narrow streaks of purplish or darker brown. Its sapwood is creamy white and provides a striking contrast to the darker heartwood. The grain is typically fine and straight, but the timber often features attractive wavy or curly grain patterns, especially near knotty areas, creating a highly decorative figure. Over time, the heartwood lightens, particularly when exposed to UV light.
Applications of American Black Walnut
American black walnut is widely regarded as a premium material for high-end furniture, cabinetry, and joinery. It is particularly favoured for its appearance in veneers used for paneling and cabinetry. Additional applications include doors, flooring, mouldings, and turnings. The timber’s dimensional stability and strength also make it a preferred choice for gunstocks and musical instruments, while its suitability for carving and turning allows for detailed ornamental work.
Workability of American Black Walnut
This timber performs well with both hand and machine tools, making it an excellent choice for carving, turning, and precision joinery. American black walnut is suitable for steam bending and takes a high polish, enhancing its decorative qualities. It glues well when conditions are carefully controlled and offers good dimensional stability for fine woodworking projects.
Durability of American Black Walnut
American black walnut is moderately durable and exhibits good resistance to decay. However, it is not termite-resistant, and care should be taken when used in environments prone to insect attack.
Origin and Availability of American Black Walnut
American black walnut grows predominantly in the eastern United States. In Australia, it is generally available in upper grades, where knots and sapwood may be present. It is most commonly imported as veneer for use in cabinetry and paneling, with solid timber products less readily available.
Very Low | Low | Medium | High | Very High | |
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Tangential : | 4.90% | ||||
Radial : | 3.40% | ||||
Unit Movement Tangential: | 0.27% | ||||
Unit Movement Radial: | 0.19% |
Very High | High | Reasonably High | Medium High | Medium | Reasonably Low | Low | Very Low | |
Unseasoned: | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 |
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Seasoned: | SD1 | SD2 | SD3 | SD4 | SD5 | SD6 | SD7 | SD8 |
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Structural No. 1 | Structural No. 2 | Structural No. 3 | Structural No. 4 | Structural No. 5 | |
Unseasoned: | F11 | F8 | F7 | F5 | F4 |
Seasoned: | F17 | F14 | F11 | F8 | F7 |
Seasoned: |
615kg/m3
|
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Unseasoned: |
970kg/m3
|
Very High | High | Reasonably High | Medium | Low | Very Low | |
Unseasoned: | J1 | J2 | J3 | J4 | J5 | J6 |
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Seasoned: | JD1 | JD2 | JD3 | JD4 | JD5 | JD6 |
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White, yellow, pale straw to light brown | Pink to pink brown | Light to dark red | Brown, chocolate, mottled or streaky | |
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Modulus of Rupture - Unseasoned: | 66 MPa |
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Modulus of Rupture - Seasoned: | 101 MPa |
Modulus of Elasticity - Unseasoned: | 9.8 GPa |
Modulus of Elasticity - Seasoned: | 11.6 GPa |
Maximum Crushing Strength - Unseasoned: | 29.6 MPa |
Maximum Crushing Strength - Seasoned: | 52.3 MPa |
Impact - Unseasoned: | |
Impact - Seasoned: | |
Toughness - Unseasoned: | |
Toughness - Seasoned: | |
Hardness - Unseasoned: | 4 |
Hardness - Seasoned: | 4.5 |
Low | Moderate | Reasonably High | High | |
(0 - 5 yrs) | (5 - 15 yrs) | (15 - 25 yrs) | (more than 25 yrs) | |
In-Ground: | ![]() | |||
(0 - 7 yrs) | (7 - 15 yrs) | (15 - 40 yrs) | (More than 40 yrs) | |
Above ground: | ![]() | |||
(0 - 20 yrs, usually < 5) | (21 - 40 yrs) | (41 - 64 yrs) | (More than 60 yrs) | |
Marine Borer Resistance: |
Lyctid Borer Susceptibility: | Susceptible |
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Lyctid Borer Susceptibility - Other: | |
Termite Resistance: | Not Resistant |
1 - non-combustible | 2 - reasonably non-combustible | 3 - slightly combustible | 4 - combustible | |
Fire Properties Group |
Average Specific Extinction Area: | <250 |
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Bushfire Resistance: | Not Tested |