Collection: Sydney Blue Gum

Sydney Blue Gum (Eucalyptus saligna) is a large hardwood native to the coastal forests of New South Wales and southern Queensland. Reaching heights of up to 60 meters, this timber is valued for its durability, strength, and appealing color palette. Extensively grown in Australian plantations, as well as in South Africa and South America, Sydney Blue Gum is a versatile timber suited to both structural and decorative applications.

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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 LowLowMediumHighVery 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:F17F14F11F8F7
Seasoned:F27F22F17F14F11

Seasoned:

840kg/m3

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 brownPink to pink brownLight to dark redBrown, chocolate, mottled or streaky
  
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Modulus of Rupture - Unseasoned:76 MPa
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
 LowModerateReasonably HighHigh
 (0 - 5 yrs)(5 - 15 yrs)(15 - 25 yrs)(more than 25 yrs)
In-Ground:Check mark  
 (0 - 7 yrs)(7 - 15 yrs)(15 - 40 yrs)(More than 40 yrs)
Above ground: Check mark 
 (0 - 20 yrs, usually < 5)(21 - 40 yrs)(41 - 64 yrs)(More than 60 yrs)
Marine Borer Resistance:Check mark  
Lyctid Borer Susceptibility:Susceptible
Lyctid Borer Susceptibility - Other: 
Termite Resistance:Not Resistant
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EFH Spread-of-Flame Index:         
EFH Smoke-Developed Index:         

Critical Radiance Flux - Lower:

>2.2 and <4.5

Critical Radiance Flux - Higher:

>2.2 and <4.5

Smoke Development Rate:

<750

1 - non-combustible2 - reasonably non-combustible3 - slightly combustible4 - combustible

Fire Properties Group
Number:

Average Specific Extinction Area:

<250

Bushfire Resistance:

BAL 12.5 and 19 – All AS3959 required applications