Appearance of Sydney Blue Gum Timber
Sydney Blue Gum’s heartwood ranges from dark pink to reddish brown, contrasting with its distinctly paler sapwood. The timber has a moderately coarse texture, with a typically straight grain and occasional interlocking. Commonly featuring gum veins, Sydney Blue Gum has a natural character that enhances its aesthetic appeal, making it suitable for visible applications.
Common Applications of Sydney Blue Gum Timber
Sydney Blue Gum is widely used in general construction, particularly in New South Wales, for applications such as flooring, cladding, fencing, paneling, and boatbuilding. It is also a popular choice for landscaping (e.g., garden sleepers), furniture, and joinery. Its resilience and attractive color make it ideal for both structural and decorative indoor and outdoor projects.
Durability of Sydney Blue Gum Timber
This timber is moderately durable, with an in-ground life expectancy of 8 to 15 years. While its heartwood offers reasonable durability, untreated sapwood is susceptible to Lyctid borer attack, making it best suited for above-ground or protected applications when durability is required.
Workability of Sydney Blue Gum Timber
Sydney Blue Gum is relatively easy to work with, allowing for smooth dressing, fixing, and polishing. It is easy to dry and accepts most finishes well, achieving a high-quality polish suitable for decorative purposes. This ease of workability and responsiveness to finishing makes Sydney Blue Gum an excellent choice for furniture and joinery.
Origin and Availability of Sydney Blue Gum Timber
Kosny Timber sources Sydney Blue Gum from native forests and plantations throughout New South Wales, where it is readily available. This widespread availability ensures a steady supply for both domestic and commercial applications, making Sydney Blue Gum a versatile and reliable choice for construction and decorative projects.
Very Low | Low | Medium | High | Very High | |
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Tangential : | 9.50% | ||||
Radial : | 5.40% | ||||
Unit Movement Tangential: | 0.34% | ||||
Unit Movement Radial: | 0.24% |
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: | F17 | F14 | F11 | F8 | F7 |
Seasoned: | F27 | F22 | F17 | F14 | F11 |
Seasoned: | 840kg/m3 |
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Unseasoned: | 1110kg/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: | 76 MPa |
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Modulus of Rupture - Seasoned: | 122 MPa |
Modulus of Elasticity - Unseasoned: | 12 GPa |
Modulus of Elasticity - Seasoned: | 15 GPa |
Maximum Crushing Strength - Unseasoned: | 41 MPa |
Maximum Crushing Strength - Seasoned: | 66 MPa |
Impact - Unseasoned: | 17 J |
Impact - Seasoned: | 18 J |
Toughness - Unseasoned: | Medium - 15 - 24 Nm |
Toughness - Seasoned: | Medium - 15 - 24 Nm |
Hardness - Unseasoned: | 5.8 |
Hardness - Seasoned: | 8.1 |
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 |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
EFH Spread-of-Flame Index: | |||||||||||
EFH Smoke-Developed Index: |
Critical Radiance Flux - Lower: | >2.2 and <4.5 |
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Critical Radiance Flux - Higher: | >2.2 and <4.5 |
Smoke Development Rate: | <750 |
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: | BAL 12.5 and 19 – All AS3959 required applications |