Collection: Coast Grey Box

Coast Grey Box is a tough, highly durable Australian hardwood that thrives in the coastal regions of eastern Victoria and New South Wales. Known for its resilience and strength, this large hardwood species is similar in appearance to Grey Box (Eucalyptus moluccana) and is valued for its use in heavy-duty applications where durability is essential.

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Appearance of Coast Grey Box Timber

The heartwood of Coast Grey Box is a pale brown, sometimes showing a hint of pink, while its sapwood is a lighter shade. With a fine, even texture and an interlocked grain, Coast Grey Box presents a refined, natural appearance. It is typically free of gum veins, giving it a clean and consistent look, ideal for high-traffic or exposed applications.

Common Applications of Coast Grey Box Timber

Highly durable and dense, Coast Grey Box is well-suited for heavy engineering construction, round timber, and sleepers. Its strength and longevity make it a reliable choice for projects requiring structural integrity and endurance, especially in challenging environments.

Workability of Coast Grey Box Timber

While Coast Grey Box offers outstanding durability, its density makes it challenging to work with. The timber can be painted, stained, and polished, though surface preparation and machining should occur just before gluing for optimal results. It is slow to dry but resistant to surface checking, ensuring stability through the drying process. Coast Grey Box is also satisfactory for steam bending, allowing for a range of applications in engineered wood products.

Origin and Availability of Coast Grey Box Timber

Kosny Timber sources Coast Grey Box from sustainably managed native forests along the southern and central coasts of New South Wales and eastern Victoria. Availability is generally limited to these regions, but the timber’s exceptional properties make it well worth the investment for heavy-duty applications.

 Very LowLowMediumHighVery High
    Check markCheck mark
Tangential :    8.20%
Radial :   3.90% 
Unit Movement Tangential:    0.42%
Unit Movement Radial:    0.31%

Very High

High

Reasonably High

Medium High

Medium

Reasonably Low

Low

Very Low

Unseasoned:

S1

S2

S3

S4

S5

S6

S7

S8

Check mark

Seasoned:

SD1

SD2

SD3

SD4

SD5

SD6

SD7

SD8

Check mark
 Structural
No. 1
Structural
No. 2
Structural
No. 3
Structural
No. 4
Structural
No. 5
Unseasoned:F22F22F17F14F11
Seasoned:F34F34F27F22F17
Seasoned:

 

1100kg/m3

 

Unseasoned:

 

1200kg/m3

 

Very High

High

Reasonably High

Medium

Low

Very Low

Unseasoned:

J1

J2

J3

J4

J5

J6

Check mark

Seasoned:

JD1

JD2

JD3

JD4

JD5

JD6

Check mark
 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:101 MPa
Modulus of Rupture - Seasoned:163 MPa
Modulus of Elasticity - Unseasoned:17 GPa
Modulus of Elasticity - Seasoned:20 GPa
Maximum Crushing Strength - Unseasoned:53 MPa
Maximum Crushing Strength - Seasoned:87 MPa
Impact - Unseasoned:23 J
Impact - Seasoned:26 J
Toughness - Unseasoned:High - 25 Nm and above
Toughness - Seasoned:High - 25 Nm and above
Hardness - Unseasoned:10
Hardness - Seasoned:13
 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:Resistant
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EFH Spread-of-Flame Index:         
EFH Smoke-Developed Index:         
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